2012 GMC Sierra Owners Manual

Some aluminum wheels can be repaired. See your dealer if any of these conditions exist. Your dealer will know the kind of wheel that is needed. Each new wheel should have the same load-carrying capacity, diameter, width, offset and be mounted the same way as the one it replaces. Replace wheels, wheel bolts, wheel nuts, or Tire Pressure Monitor System (TPMS) sensors with new GM original equipment parts.

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Vehicle Care

10-73

Used Replacement Wheels { WARNING

Replacing a wheel with a used one is dangerous. How it has been used or how far it has been driven may be unknown. It could fail suddenly and cause a crash. When replacing wheels, use a new GM original equipment wheel.

{ WARNING

Using the wrong replacement wheels, wheel bolts, or wheel nuts can be dangerous. It could affect the braking and handling of the vehicle. Tires can lose air, and cause loss of control, causing a crash. Always use the correct wheel, wheel bolts, and wheel nuts for replacement.

Notice: The wrong wheel can also cause problems with bearing life, brake cooling, speedometer or odometer calibration, headlamp aim, bumper height, vehicle ground clearance, and tire or tire chain clearance to the body and chassis. Whenever a wheel, wheel bolt, or wheel nut is replaced on a dual wheel setup, check the wheel nut torque after 160, 1 600 and 10 000 km (100, 1,000 and 6,000 mi) of driving. For proper torque, see “Wheel Nut Torque” under Capacities and Specifications on page 12‑2. See If a Tire Goes Flat on page 10‑75 for more information.

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10-74

Vehicle Care

Tire Chains

{ WARNING

If the vehicle has dual wheels or P265/65R18, P275/55R20, LT265/70R17, LT265/70R18, LT265/60R20, P285/50R20, P285/45R22 or 285/45R22 size tires, do not use tire chains. They can damage the vehicle because there is not enough clearance. Tire chains used on a vehicle without the proper amount of clearance can cause damage to the brakes, suspension, or other vehicle parts. The area damaged by the tire chains could cause you to lose control of the vehicle and you or others may be injured in a crash.

(Continued)

WARNING (Continued)

Use another type of traction device only if its manufacturer recommends it for use on the vehicle and tire size combination and road conditions. Follow that manufacturer's instructions. To help avoid damage to the vehicle, drive slowly, readjust, or remove the device if it is contacting the vehicle, and do not spin the vehicle's wheels. If you do find traction devices that will fit, install them on the rear tires.

Notice: If the vehicle does not have dual wheels and has a tire size other than P265/65R18, P275/55R20, LT265/70R17, LT265/70R18, LT265/60R20, P285/50R20, P285/45R22, or 285/45R22, use tire chains only where legal and only when you must. Use chains that are the proper size for the tires. Install them on the tires of the rear axle. Do not use chains on the tires of the front axle. Tighten them as tightly as possible with the ends securely fastened. Drive slowly and follow the chain manufacturer's instructions. If you can hear the chains contacting the vehicle, stop and retighten them. If the contact continues, slow down until it stops. Driving too fast or spinning the wheels with chains on will damage the vehicle.

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Black plate (75,1)

{ WARNING

Driving on a flat tire will cause permanent damage to the tire. Re-inflating a tire after it has been driven on while severely underinflated or flat may cause a blowout and a serious crash. Never attempt to re-inflate a tire that has been driven on while severely underinflated or flat. Have your dealer or an authorized tire service center repair or replace the flat tire as soon as possible.

Vehicle Care

10-75

{ WARNING Lifting a vehicle and getting under it to do maintenance or repairs is dangerous without the appropriate safety equipment and training. If a jack is provided with the vehicle, it is designed only for changing a flat tire. If it is used for anything else, you or others could be badly injured or killed if the vehicle slips off the jack. If a jack is provided with the vehicle, only use it for changing a flat tire.

If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place, well off the road, if possible.

If a Tire Goes Flat It is unusual for a tire to blowout while driving, especially if the tires are maintained properly. If air goes out of a tire, it is much more likely to leak out slowly. But if there ever is a blowout, here are a few tips about what to expect and what to do: If a front tire fails, the flat tire creates a drag that pulls the vehicle toward that side. Take your foot off the accelerator pedal and grip the steering wheel firmly. Steer to maintain lane position, and then gently brake to a stop, well off the road, if possible. A rear blowout, particularly on a curve, acts much like a skid and may require the same correction as used in a skid. Stop pressing the accelerator pedal and steer to straighten the vehicle. It may be very bumpy and noisy. Gently brake to a stop, well off the road, if possible.

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10-76

Vehicle Care

Turn on the hazard warning flashers. See Hazard Warning Flashers on page 6‑5.

{ WARNING

Changing a tire can be dangerous. The vehicle can slip off the jack and roll over or fall causing injury or death. Find a level place to change the tire. To help prevent the vehicle from moving:

1. Set the parking brake firmly. 2. Put an automatic

transmission in P (Park) or a manual transmission in 1 (First) or R (Reverse).

3. For four-wheel-drive vehicles, be sure the transfer case is in a drive gear– not in N (Neutral).

4. Turn off the engine and do not restart while the vehicle is raised.

(Continued)

The following information explains how to use the jack and change a tire.

Tire Changing

Removing the Spare Tire and Tools

WARNING (Continued)

5. Do not allow passengers to

remain in the vehicle. 6. Place wheel blocks on

both sides of the tire at the opposite corner of the tire being changed.

When the vehicle has a flat tire (B), use the following example as a guide to assist in the placement of the wheel blocks (A).

A. Wheel Block B. Flat Tire

Crew Cab

A. Wing Nut Retaining Tool Kit B. Tool Kit C. Wheel Blocks D. Jack

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Black plate (77,1)

E. Jack Knob F. Wing Nut Retaining Wheel

Blocks

Extended Cab

A. Wing Nut Retaining Tool Kit B. Tool Kit C. Wheel Blocks D. Jack E. Jack Knob For regular cab models, the equipment you will need is behind the passenger seat.

Regular Cab

A. Wing Nut Retaining Tool Kit B. Tool Kit C. Wheel Blocks D. Jack E. Jack Knob F. Wing Nut Retaining Wheel

Blocks

Vehicle Care

10-77

For extended and crew cab models, the equipment is on the shelf behind the passenger side second row seat. 1. Turn the knob on the jack

counterclockwise to lower the jack head to release the jack from its holder.

2. Turn the wing nut

counterclockwise to remove the wheel blocks and the wheel block retainer.

3. Turn the wing nut used to retain

the storage bag and tools counterclockwise to remove it.

Use the jack handle extensions and the wheel wrench to remove the underbody-mounted spare tire.

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Black plate (78,1)

10-78

Vehicle Care

Jack Handle Extensions

I. J. Spare Tire Lock (If equipped) 1. Open the spare tire lock cover

on the bumper and use the ignition key to remove the spare tire lock (J). To remove the spare tire lock, insert the ignition key turn and pull straight out.

2. Assemble the wheel wrench (H)

and the two jack handle extensions (I), as shown.

3.

Insert the hoist end (open end) (F) of the extension through the hole (G) in the rear bumper. Do not use the chiseled end of the wheel wrench. Be sure the hoist end of the extension (F) connects to the hoist shaft. The ribbed square end of the extension is used to lower the spare tire.

4. Turn the wheel wrench

counterclockwise to lower the spare tire to the ground. Continue to turn the wheel wrench until the spare tire can be pulled out from under the vehicle.

A. Spare Tire (Valve Stem

Pointed Down) B. Hoist Assembly C. Hoist Cable D. Tire/Wheel Retainer E. Hoist Shaft F. Hoist End of Extension Tool G. Hoist Shaft Access Hole H. Wheel Wrench

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5. Pull the spare tire out from under

the vehicle.

Vehicle Care

10-79

6. Tilt the tire toward the vehicle

with some slack in the cable to access the tire/wheel retainer. Tilt the retainer and pull it through the center of the wheel along with the cable and spring.

7. Put the spare tire near the

flat tire.

Removing the Flat Tire and Installing the Spare Tire Use the following pictures and instructions to remove the flat tire and raise the vehicle.

A. Jack B. Wheel Blocks C. Jack Handle D. Jack Handle Extension E. Wheel Wrench The tools you will be using include the jack (A), the wheel blocks (B), the jack handle (C), the jack handle extensions (D), and the wheel wrench (E). 1. Do a safety check before

proceeding. See If a Tire Goes Flat on page 10‑75 for more information.

2.

If the vehicle has wheel nut caps, loosen them by turning the wheel wrench counterclockwise. If the vehicle has a center cap with wheel nut caps, the wheel nut caps are designed to stay with the center cap after they are loosened. Remove the entire center cap.

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Black plate (80,1)

10-80

Vehicle Care

If the wheel has a smooth center cap, place the chisel end of the wheel wrench in the slot on the wheel, and gently pry it out.

3. Use the wheel wrench and turn it

counterclockwise to loosen the wheel nuts. Do not remove the wheel nuts yet.

Front Position - 1500 Models

4. Position the jack under the

vehicle, as shown. If the flat tire is on the front of the vehicle (1500 Model vehicles), position the jack under the bracket attached to the vehicle's frame, behind the flat tire.

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Vehicle Care

10-81

Front Position - All Other Models

Position the jack under the vehicle, as shown. If the flat tire is on the front of the vehicle (all other models), position the jack on the frame behind the flat tire.

5.

Rear Position – 1500 Models If the flat tire is on the rear, for 1500 models position the jack under the rear axle about 5 cm (2 in) inboard of the shock absorber bracket.

Rear Position – All Other Models For all other models, position the jack under the rear axle between the spring anchor and the shock absorber bracket. If a snow plow has been added to the front of the vehicle, lower the snow plow fully before raising the vehicle.

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Black plate (82,1)

10-82

Vehicle Care

Make sure that the jack head is positioned so that the rear axle is resting securely between the grooves that are on the jack head.

{ WARNING

Getting under a vehicle when it is lifted on a jack is dangerous. If the vehicle slips off the jack, you could be badly injured or killed. Never get under a vehicle when it is supported only by a jack.

{ WARNING Raising the vehicle with the jack improperly positioned can damage the vehicle and even make the vehicle fall. To help avoid personal injury and vehicle damage, be sure to fit the jack lift head into the proper location before raising the vehicle.

6. Turn the wheel wrench

clockwise to raise the vehicle. Raise the vehicle far enough off the ground so there is enough room for the spare tire to fit under the wheel well.

{ WARNING

Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel nuts become loose after time. The wheel could come off and cause an accident. When changing a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In an emergency, a cloth or a paper towel can be used; however, use a scraper or wire brush later to remove all rust or dirt.

7. Remove all the wheel nuts and

take off the flat tire.

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Black plate (83,1)

Vehicle Care

10-83

{ WARNING

{ WARNING

Never use oil or grease on bolts or nuts because the nuts might come loose. The vehicle's wheel could fall off, causing a crash.

10. Put the wheel nuts back on with the rounded end of the nuts toward the wheel.

11. Tighten each wheel nut by hand. Then use the wheel wrench to tighten the nuts until the wheel is held against the hub.

12. Turn the wheel wrench

counterclockwise to lower the vehicle. Lower the jack completely.

If wheel studs are damaged, they can break. If all the studs on a wheel broke, the wheel could come off and cause a crash. If any stud is damaged because of a loose-running wheel, it could be that all of the studs are damaged. To be sure, replace all studs on the wheel. If the stud holes in a wheel have become larger, the wheel could collapse in operation. Replace any wheel if its stud holes have become larger or distorted in any way. Inspect hubs and hub‐piloted wheels for damage. Because of loose running wheels, piloting pad damage may occur and require replacement of the entire hub, for proper centering of the wheels. When replacing studs, hubs, wheel nuts or wheels, be sure to use GM original equipment parts.

8. Remove any rust or dirt from the wheel bolts, mounting surfaces, and spare wheel. Install the spare tire.

9.

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Black plate (84,1)

10-84

Vehicle Care

{ WARNING

Wheel nuts that are improperly or incorrectly tightened can cause the wheels to become loose or come off. The wheel nuts should be tightened with a torque wrench to the proper torque specification after replacing. Follow the torque specification supplied by the aftermarket manufacturer when using accessory locking wheel nuts. See Capacities and Specifications on page 12‑2 for original equipment wheel nut torque specifications.

Notice: Improperly tightened wheel nuts can lead to brake pulsation and rotor damage. To avoid expensive brake repairs, evenly tighten the wheel nuts in the proper sequence and to the proper torque specification. See Capacities and Specifications on page 12‑2 for the wheel nut torque specification.

place the cap on the wheel and tap it into place until it seats flush with the wheel. The cap only goes on one way. Be sure to line up the tab on the center cap with the indentation on the wheel. For bolt-on hub caps, align the plastic nut caps with the wheel nuts and then tighten by hand. Then use the wheel wrench to tighten. Storing a Flat or Spare Tire and Tools

{ WARNING

Storing a jack, a tire, or other equipment in the passenger compartment of the vehicle could cause injury. In a sudden stop or collision, loose equipment could strike someone. Store all these in the proper place.

Notice: Storing an aluminum wheel with a flat tire under your vehicle for an extended period of time or with the valve stem

13. Tighten the nuts firmly in a

crisscross sequence, as shown, by turning the wheel wrench clockwise.

For vehicles with dual wheels, have a technician check the wheel nut tightness of all wheels with a torque wrench after the first 160 km (100 mi) and then 1600 km (1,000 mi) after that. Repeat this service whenever you have a tire removed or serviced. See Capacities and Specifications on page 12‑2 for more information. When reinstalling the regular wheel and tire, also reinstall either the center cap, or bolt-on hub cap, depending on what the vehicle is equipped with. For center caps,

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Black plate (85,1)

pointing up can damage the wheel. Always stow the wheel with the valve stem pointing down and have the wheel/tire repaired as soon as possible. Store the tire under the rear of the vehicle in the spare tire carrier.

A. Flat or Spare Tire (Valve Stem

Pointed Down) B. Hoist Assembly C. Hoist Cable

D. Tire/Wheel Retainer E. Hoist Shaft F. Hoist End of Extension Tool G. Hoist Shaft Access Hole H. Wheel Wrench I. J. Spare Tire Lock (If Equipped) 1. Put the tire on the ground at the rear of the vehicle with the valve stem pointed down, and to the rear.

Jack Handle Extensions

2. Pull the cable and spring

through the center of the wheel. Tilt the wheel retainer plate down and through the center wheel. Make sure the retainer is fully seated across the underside of the wheel.

Vehicle Care

10-85

3. Attach the wheel wrench (H) and

extensions (I) together, as shown.

4.

Insert the hoist end (F) through the hole (G) in the rear bumper and onto the hoist shaft. Do not use the chiseled end of the wheel wrench.

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Black plate (86,1)

10-86

Vehicle Care

5. Raise the tire part way upward. Make sure the retainer is seated in the wheel opening.

8. Reinstall the spare tire lock,

if the vehicle has one.

To store the jack and jack tools:

6. Raise the tire fully against the

underside of the vehicle by turning the wheel wrench clockwise until you hear two clicks or feel it skip twice. You cannot overtighten the cable.

A. Wing Nut Retaining Wheel

Blocks

B. Wheel Blocks C. Wing Nut Retaining Tool Kit D. Wheel Wrench and Extensions E. Tool Bag F.

Jack Mounting Bracket

7. Make sure the tire is stored

securely. Push, pull (A), and then try to turn (B) the tire. If the tire moves, use the wheel wrench to tighten the cable.

G. Jack H. Bolt Retaining Wheel Blocks 1. Put the tools (D) in the tool

bag (E) and place them in the retaining bracket (C).

2. Tighten down the wing nut (C). 3. Assemble the wheel blocks (B)

and jack (G) together with the wing nut (A) and retaining bolt (H).

4. Position the jack (G) in the

mounting bracket (F). Position the holes in the base of the jack (G) onto the pin in the mounting bracket (F).

5. Return them to their original

location in the vehicle. For more information, refer to “Removing the Spare Tire and Tools” for more information.

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Black plate (87,1)

Full-Size Spare Tire Your vehicle, when new, had a fully-inflated spare tire. A spare tire may lose air over time, so check its inflation pressure regularly. See Tire Pressure on page 10‑58 and Vehicle Load Limits on page 9‑16
for information regarding proper tire inflation and loading your vehicle. For instruction on how to remove, install or store a spare tire, see “Removing the Flat Tire and Installing the Spare” and “Storing a Flat or Spare Tire and Tools” under Tire Changing on page 10‑76.

Notice: If the vehicle has four-wheel drive and a different size spare tire is installed, do not drive in four-wheel drive until the flat tire is repaired and/or replaced. The vehicle could be damaged and the repairs would not be covered by the warranty. Never use four-wheel drive when a different size spare tire is installed on the vehicle. Your vehicle may have a different size spare tire than the road tires originally installed on your vehicle. This spare tire was developed for use on your vehicle, so it is all right to drive on it. If your vehicle has four-wheel drive and the different size spare tire is installed, keep the vehicle in two-wheel drive.

Vehicle Care

10-87

After installing the spare tire on your vehicle, you should stop as soon as possible and make sure the spare tire is correctly inflated. Have the damaged or flat road tire repaired or replaced as soon as you can and installed back onto your vehicle. This way, the spare tire will be available in case you need it again. Do not mix tires and wheels of different sizes, because they will not fit. Keep your spare tire and its wheel together. If your vehicle has a spare tire that does not match your vehicle's original road tires and wheels in size and type, do not include the spare in the tire rotation.

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Black plate (88,1)

10-88

Vehicle Care

Jump Starting For more information about the vehicle battery, see Battery on page 10‑30. If the vehicle is a hybrid, see the hybrid supplement for more information. If the vehicle's battery (or batteries) has run down, you may want to use another vehicle and some jumper cables to start your vehicle. Be sure to use the following steps to do it safely.

{ WARNING

Batteries can hurt you. They can be dangerous because:

. They contain acid that can

burn you.

. They contain gas that can

explode or ignite.

. They contain enough electricity to burn you.

If you do not follow these steps exactly, some or all of these things can hurt you.

Notice: Ignoring these steps could result in costly damage to the vehicle that would not be covered by the warranty. Trying to start the vehicle by pushing or pulling it will not work, and it could damage the vehicle. 1. Check the other vehicle. It must

have a 12-volt battery with a negative ground system.

Notice: Only use a vehicle that has a 12-volt system with a negative ground for jump starting. If the other vehicle does not have a 12-volt system with a negative ground, both vehicles can be damaged. 2.

If you have a vehicle with a diesel engine with two batteries, you should know before you begin that, especially in cold weather, you may not be able to

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Black plate (89,1)

get enough power from a single battery in another vehicle to start your diesel engine. If your vehicle has more than one battery, using the battery that is closer to the starter will reduce electrical resistance. This is located on the passenger side, in the rear of the engine compartment.

3. Get the vehicles close enough

so the jumper cables can reach, but be sure the vehicles are not touching each other. If they are, it could cause an unwanted ground connection. You would not be able to start your vehicle, and the bad grounding could damage the electrical systems.

To avoid the possibility of the vehicles rolling, set the parking brake firmly on both vehicles involved in the jump start procedure. Put the automatic transmission in P (Park) or a manual transmission in Neutral before setting the parking brake. If you have a four-wheel-drive vehicle, be sure the transfer case is in a drive gear, not in Neutral.

Notice: If any accessories are left on or plugged in during the jump starting procedure, they could be damaged. The repairs would not be covered by the vehicle warranty. Whenever possible, turn off or unplug all accessories on either vehicle when jump starting the vehicle.

Vehicle Care

10-89

4. Turn off the ignition on both

vehicles. Unplug unnecessary accessories plugged into the accessory power outlets. Turn off the radio and all the lamps that are not needed. This will avoid sparks and help save both batteries. And it could save the radio!

5. Open the hood on the

other vehicle and locate the positive (+) and negative (−) terminal locations on that vehicle. The positive (+) terminal, is located under a red plastic cover at the positive battery post. To uncover the positive (+) terminal, open the red plastic cover.

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Black plate (90,1)

10-90

Vehicle Care

WARNING (Continued)

Be sure the battery has enough water. You do not need to add water to the battery installed in your new vehicle. But if a battery has filler caps, be sure the right amount of fluid is there. If it is low, add water to take care of that first. If you do not, explosive gas could be present. Battery fluid contains acid that can burn you. Do not get it on you. If you accidentally get it in your eyes or on your skin, flush the place with water and get medical help immediately.

For more information on the location of the remote positive (+) and remote negative (−) terminals, see Engine Compartment Overview on page 10‑6

{ WARNING

An electric fan can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan.

{ WARNING

Using an open flame near a battery can cause battery gas to explode. People have been hurt doing this, and some have been blinded. Use a flashlight if you need more light.

(Continued)

If your vehicle has a gasoline engine, the remote negative (-) terminal is a stud located on the right front of the engine, where the negative battery cable attaches. If your vehicle has a diesel engine, the remote negative (-) terminal is the negative (-) post on the auxiliary battery on the driver side of the engine compartment.

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Black plate (91,1)

{ WARNING

Fans or other moving engine parts can injure you badly. Keep your hands away from moving parts once the engine is running.

6. Check that the jumper cables do not have loose or missing insulation. If they do, you could get a shock. The vehicles could be damaged too. Before you connect the cables, here are some basic things you should know. Positive (+) will go to positive (+) or to a remote positive (+) terminal if the vehicle has one. Negative (−) will go to a heavy, unpainted metal engine part or to a remote negative (−) terminal if the vehicle has one.

Do not connect positive (+) to negative (−) or you will get a short that would damage the battery and maybe other parts too. And do not connect the negative (−) cable to the negative (−) terminal on the dead battery because this can cause sparks.

Vehicle Care

10-91

8. Do not let the other end touch

metal. Connect it to the positive (+) terminal of the good battery. Use a remote positive (+) terminal if the vehicle has one.

9. Now connect the black

negative (−) cable to the negative (−) terminal of the good battery. Use a remote negative (−) terminal if the vehicle has one. Do not let the other end touch anything until the next step.

10. Connect the other end of the negative (−) cable to a heavy, unpainted metal engine part or to the remote negative (−) terminal, on the vehicle with the dead battery.

5.3L Engine (4.3L, 4.8L, 6.0L, 6.2L

11. Start the vehicle with the good

and 6.6L Similar)

7. Connect the red positive (+)

cable to the positive (+) terminal of the vehicle with the dead battery.

battery and run the engine for a while.

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Black plate (92,1)

10-92

Vehicle Care

12. Try to start the vehicle that

had the dead battery. If it will not start after a few tries, it probably needs service.

Notice: If the jumper cables are connected or removed in the wrong order, electrical shorting may occur and damage the vehicle. The repairs would not be covered by the vehicle warranty. Always connect and remove the jumper cables in the correct order, making sure that the cables do not touch each other or other metal.

To disconnect the jumper cables from both vehicles do the following: 1. Disconnect the black

negative (−) cable from the vehicle that had the bad battery.

2. Disconnect the black

negative (−) cable from the vehicle with the good battery.

3. Disconnect the red positive (+) cable from the vehicle with the good battery.

4. Disconnect the red positive (+)

cable from the other vehicle.

5. Return the positive (+) terminal

cover, to its original position.

Jumper Cable Removal

A. Heavy, Unpainted Metal Engine

Part or Remote Negative (−) Terminal

B. Good Battery or Remote Positive (+) and Remote Negative (−) Terminals

C. Dead Battery or Remote

Positive (+) Terminal

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Vehicle Care

10-93

Towing

Towing the Vehicle Notice: To avoid damage, the disabled vehicle should be towed with all four wheels off the ground. Care must be taken with vehicles that have low ground clearance and/or special equipment. Always flatbed on a car carrier. Consult your dealer or a professional towing service if the disabled vehicle must be towed. See Roadside Assistance Program (U.S. and Canada) on page 13‑7 or Roadside Assistance Program (Mexico) on page 13‑9. To tow the vehicle behind another vehicle for recreational purposes, such as behind a motor home, see “Recreational Vehicle Towing” in this section.

Recreational Vehicle Towing Recreational vehicle towing means towing the vehicle behind another vehicle, such as a motor home. The two most common types of recreational vehicle towing are known as dinghy towing and dolly towing. Dinghy towing is towing the vehicle with all four wheels on the ground. Dolly towing is towing the vehicle with two wheels on the ground and two wheels up on a device known as a dolly. Here are some important things to consider before recreational vehicle towing: . What is the towing capacity

of the towing vehicle? Be sure to read the tow vehicle manufacturer's recommendations.

. What is the distance that will be travelled? Some vehicles have restrictions on how far and how long they can tow. Is the proper towing equipment going to be used? See your dealer or trailering professional for additional advice and equipment recommendations. Is the vehicle ready to be towed? Just as preparing the vehicle for a long trip, make sure the vehicle is prepared to be towed.

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Black plate (94,1)

10-94

Vehicle Care

Dinghy Towing

Two-Wheel-Drive Vehicles

Two-wheel-drive vehicles should not be towed with all four wheels on the ground. Two-wheel-drive transmissions have no provisions for internal lubrication while being towed.

Four-Wheel-Drive Vehicles

Notice: If the vehicle is towed with all four wheels on the ground, the drivetrain components could be damaged. The repairs would not be covered by the vehicle warranty. Do not tow the vehicle with all four wheels on the ground.

Use the following procedure to dinghy tow a four-wheel-drive vehicle: 1. Position the vehicle being towed behind the tow vehicle and shift the transmission to P (Park).

2. Turn the engine off and firmly set

the parking brake.

3. Securely attach the vehicle

being towed to the tow vehicle.

{ WARNING Shifting a four-wheel-drive vehicle's transfer case into N (Neutral) can cause the vehicle to roll even if the transmission is in P (Park). The driver or others could be injured. Make sure the parking brake is firmly set before the transfer case is shifted to N (Neutral).

4. Shift the transfer case to

N (Neutral). See “Shifting into Neutral” under Four-Wheel Drive on page 9‑40 for the proper procedure to select the Neutral position for the vehicle.

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Black plate (95,1)

Dolly Towing

Front Towing (Front Wheels Off the Ground) – Two-Wheel-Drive Vehicles

5. Release the parking brake only after the vehicle being towed is firmly attached to the towing vehicle.

6. Turn the ignition to LOCK/OFF

and remove the key — the steering wheel will still turn.

After towing, see “Shifting Out of Neutral” under Four-Wheel Drive on page 9‑40 for the proper procedure to take the vehicle out of the Neutral position.

Vehicle Care

10-95

Two-wheel-drive vehicles should not be towed with the rear wheels on the ground. Two-wheel-drive transmissions have no provisions for internal lubrication while being towed. To dolly tow a two‐wheel‐drive vehicle, the vehicle must be towed with the rear wheels on the dolly. See “Rear Towing (Rear Wheels Off the Ground)” later in this section for more information.

Notice: If a two-wheel drive vehicle is towed with the rear wheels on the ground, the transmission could be damaged. The repairs would not be covered by the vehicle warranty. Never tow the vehicle with the rear wheels on the ground.

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Black plate (96,1)

10-96

Vehicle Care

Front Towing (Front Wheels Off the Ground) – Four-Wheel-Drive Vehicles

3. Shift the transmission to

P (Park).

4. Firmly set the parking brake.

{ WARNING Shifting a four-wheel-drive vehicle's transfer case into N (Neutral) can cause the vehicle to roll even if the transmission is in P (Park). The driver or others could be injured. Make sure the parking brake is firmly set before the transfer case is shifted to N (Neutral).

5. Use an adequate clamping

device designed for towing to ensure that the front wheels are locked into the straight position.

Use the following procedure to dolly tow a four-wheel-drive vehicle from the front: 1. Attach the dolly to the tow vehicle following the dolly manufacturer's instructions.

2. Drive the front wheels onto the

dolly.

6. Secure the vehicle to the dolly

following the manufacturer's instructions.

7. Shift the transfer case to

N (Neutral). See “Shifting into Neutral” under Four-Wheel Drive on page 9‑40 for the proper procedure to select the neutral position for the vehicle.

8. Release the parking brake only after the vehicle being towed is firmly attached to the towing vehicle.

9. Turn the ignition to LOCK/OFF. After towing, see “Shifting Out of Neutral” under Four-Wheel Drive on page 9‑40.

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Rear Towing (Rear Wheels Off the Ground)

2. Drive the rear wheels onto the

dolly.

3. Firmly set the parking brake.

See Parking Brake on page 9‑54.

4. Put the transmission in P (Park). 5. Secure the vehicle to the dolly

following the manufacturer's instructions.

6. Use an adequate clamping

device designed for towing to ensure that the front wheels are locked into the straight position. 7. Turn the ignition to LOCK/OFF.

Two‐Wheel‐Drive Vehicles

Use the following procedure to dolly tow a two-wheel-drive vehicle from the rear: 1. Attach the dolly to the tow vehicle following the dolly manufacturer's instructions.

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10-97

Four‐Wheel‐Drive Vehicles Use the following procedure to dolly tow a four-wheel-drive vehicle from the rear: 1. Attach the dolly to the tow vehicle following the dolly manufacturer's instructions.

2. Drive the rear wheels onto the

dolly.

3. Firmly set the parking brake.

See Parking Brake on page 9‑54.

4. Put the transmission in P (Park). 5. Secure the vehicle to the dolly

following the manufacturer's instructions.

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10-98

Vehicle Care

6. Use an adequate clamping

device designed for towing to ensure that the front wheels are locked into the straight position.

{ WARNING Shifting a four-wheel-drive vehicle's transfer case into N (Neutral) can cause the vehicle to roll even if the transmission is in P (Park). The driver or others could be injured. Make sure the parking brake is firmly set before the transfer case is shifted to N (Neutral).

7. Shift the transfer case to

N (Neutral). See “Shifting into Neutral” under Four-Wheel Drive on page 9‑40 for the proper procedure to select the neutral position for the vehicle.

8. Turn the ignition to LOCK/OFF. After towing, see “Shifting Out of Neutral” under Four-Wheel Drive on page 9‑40.

Appearance Care

Exterior Care

Washing the Vehicle To preserve the vehicle's finish, wash it often and out of direct sunlight. Notice: Do not use petroleum based, acidic, or abrasive cleaning agents as they can damage the vehicle's paint, metal, or plastic parts. If damage occurs, it would not be covered by the vehicle's warranty. Approved cleaning products can be obtained from your dealer. Follow all manufacturer directions regarding correct product usage, necessary safety precautions, and appropriate disposal of any vehicle care product. Notice: Avoid using high pressure washes closer than 30 cm (12 in) to the surface of the vehicle. Use of power washers

exceeding 8,274 kPa (1,200 psi) can result in damage or removal of paint and decals. Rinse the vehicle well, before washing and after, to remove all cleaning agents completely. If they are allowed to dry on the surface, they could stain. Dry the finish with a soft, clean chamois or an all-cotton towel to avoid surface scratches and water spotting. Finish Care Application of aftermarket clearcoat sealant/wax materials is not recommended. If painted surfaces are damaged, see your dealer to have the damage assessed and repaired. Foreign materials such as calcium chloride and other salts, ice melting agents, road oil and tar, tree sap, bird droppings, chemicals from industrial chimneys, etc., can damage the vehicle's finish if they remain on painted surfaces. Wash the vehicle as soon as possible. If necessary, use non-abrasive

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cleaners that are marked safe for painted surfaces to remove foreign matter. Occasional hand waxing or mild polishing should be done to remove residue from the paint finish. See your dealer for approved cleaning products. Notice: Machine compounding or aggressive polishing on a basecoat/clearcoat paint finish may damage it. Use only non-abrasive waxes and polishes that are made for a basecoat/ clearcoat paint finish on the vehicle. To keep the paint finish looking new, keep the vehicle garaged or covered whenever possible.

Protecting Exterior Bright Metal Parts Regularly clean bright metal parts with water or chrome polish on chrome or stainless steel trim, if necessary.

For aluminum, never use auto or chrome polish, steam, or caustic soap to clean. A coating of wax, rubbed to high polish, is recommended for all bright metal parts. Cleaning Exterior Lamps/ Lenses Use only lukewarm or cold water, a soft cloth, and a car washing soap to clean exterior lamps and lenses. Follow instructions under "Washing the Vehicle" later in this section. Windshield and Wiper Blades Clean the outside of the windshield with glass cleaner. Clean rubber blades using lint-free cloth or paper towel soaked with windshield washer fluid or a mild detergent. Wash the windshield thoroughly when cleaning the blades. Bugs, road grime, sap, and a buildup of vehicle wash/wax treatments may cause wiper streaking.

Vehicle Care

10-99

Replace the wiper blades if they are worn or damaged. Damage can be caused by extreme dusty conditions, sand, salt, heat, sun, snow and ice. Weatherstrips Apply silicone grease on weatherstrips to make them last longer, seal better, and not stick or squeak. See Recommended Fluids and Lubricants on page 11‑12. Tires Use a stiff brush with tire cleaner to clean the tires. Notice: Using petroleum-based tire dressing products on the vehicle may damage the paint finish and/or tires. When applying a tire dressing, always wipe off any overspray from all painted surfaces on the vehicle.

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10-100

Vehicle Care

Wheels and Trim — Aluminum or Chrome Use a soft, clean cloth with mild soap and water to clean the wheels. After rinsing thoroughly with clean water, dry with a soft, clean towel. A wax may then be applied. Keep the wheels clean using a soft, clean cloth with mild soap and water. Rinse with clean water. After rinsing thoroughly, dry with a soft, clean towel. A wax may then be applied. Notice: Chrome wheels and other chrome trim may be damaged if the vehicle is not washed after driving on roads that have been sprayed with magnesium, calcium, or sodium chloride. These chlorides are used on roads for conditions such as ice and dust. Always wash the chrome with soap and water after exposure.

Notice: To avoid surface damage, do not use strong soaps, chemicals, abrasive polishes, cleaners, brushes, or cleaners that contain acid on aluminum or chrome-plated wheels. Use only approved cleaners. Also, never drive a vehicle with aluminum or chrome-plated wheels through an automatic car wash that uses silicone carbide tire cleaning brushes. Damage could occur and the repairs would not be covered by the vehicle warranty. Steering, Suspension, and Chassis Components Visually inspect front and rear suspension and steering system for damaged, loose, or missing parts or signs of wear. Inspect the power steering for proper hook-up, binding, leaks, cracks, chafing, etc. Visually check constant velocity joints, rubber boots, and axle seals for leaks.

Body Component Lubrication Lubricate all key lock cylinders, hood hinges, liftgate hinges, and steel fuel door hinge unless the components are plastic. Applying silicone grease on weatherstrips with a clean cloth will make them last longer, seal better, and not stick or squeak. Underbody Maintenance Use plain water to flush dirt and debris from the vehicle's underbody. Your dealer or an underbody car washing system can do this. If not removed, rust and corrosion can develop. Sheet Metal Damage If the vehicle is damaged and requires sheet metal repair or replacement, make sure the body repair shop applies anti-corrosion material to parts repaired or replaced to restore corrosion protection.

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Original manufacturer replacement parts will provide the corrosion protection while maintaining the vehicle warranty. Finish Damage Quickly repair minor chips and scratches with touch-up materials available from your dealer to avoid corrosion. Larger areas of finish damage can be corrected in your dealer's body and paint shop. Chemical Paint Spotting Airborne pollutants can fall upon and attack painted vehicle surfaces causing blotchy, ring-shaped discolorations, and small, irregular dark spots etched into the paint surface.

Interior Care To prevent dirt particle abrasions, regularly clean the vehicle's interior. Immediately remove any soils. Note that newspapers or dark garments that can transfer color to home

furnishings can also permanently transfer color to the vehicle's interior. Use a soft bristle brush to remove dust from knobs and crevices on the instrument cluster. Using a mild soap solution, immediately remove hand lotions, sunscreen, and insect repellant from all interior surfaces or permanent damage may result. Your dealer may have products for cleaning the interior. Use cleaners specifically designed for the surfaces being cleaned to prevent permanent damage. To prevent overspray, apply all cleaners directly to the cleaning cloth. Cleaners should be removed quickly. Never allow cleaners to remain on the surface being cleaned for extended periods of time. Cleaners may contain solvents that can become concentrated in the interior. Before using cleaners, read and adhere to all safety instructions on the label. While cleaning the

Vehicle Care

10-101

interior, maintain adequate ventilation by opening the doors and windows. To prevent damage, do not clean the interior using the following cleaners or techniques: . Never use a razor or any other

sharp object to remove a soil from any interior surface.

. Never use a brush with stiff

bristles.

. Never rub any surface

aggressively or with excessive pressure.

. Do not use laundry detergents

or dishwashing soaps with degreasers. For liquid cleaners, use approximately 20 drops per 3.78L (1 gal) of water. A concentrated soap solution will leave a residue that creates streaks and attracts dirt. Do not use solutions that contain strong or caustic soap.

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10-102

Vehicle Care

. Do not heavily saturate the upholstery when cleaning.

. Do not use solvents or cleaners

containing solvents.

Interior Glass To clean, use a terry cloth fabric dampened with water. Wipe droplets left behind with a clean dry cloth. Commercial glass cleaners may be used, if necessary, after cleaning the interior glass with plain water. Notice: To prevent scratching, never use abrasive cleaners on automotive glass. Abrasive cleaners or aggressive cleaning may damage the rear window defogger. Fabric/Carpet Start by vacuuming the surface using a soft brush attachment. If a rotating brush attachment is being used during vacuuming, only use it on the floor carpet. Before cleaning,

gently remove as much of the soil as possible using one of the following techniques: . Gently blot liquids with a paper towel. Continue blotting until no more soil can be removed. For solid soils, remove as much as possible prior to vacuuming.

To clean: 1. Saturate a clean lint-free

colorfast cloth with water or club soda. Microfiber cloth is recommended to prevent lint transfer to the fabric or carpet.

2. Remove excess moisture by

gently wringing until water does not drip from the cleaning cloth. 3. Start on the outside edge of the

soil and gently rub toward the center. Rotate the cleaning cloth to a clean area frequently to prevent forcing the soil in to the fabric.

4. Continue gently rubbing the soiled area until there is no longer any color transfer from the soil to the cleaning cloth. If the soil is not completely removed, use a mild soap solution followed by only club soda or plain water.

5.

If the soil is not completely removed, it may be necessary to use a commercial upholstery cleaner or spot lifter. Test a small hidden area for colorfastness before using a commercial upholstery cleaner or spot lifter. If ring formation occurs, clean the entire fabric or carpet. Following the cleaning process, a paper towel can be used to blot excess moisture.

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Vehicle Care

10-103

Care of Safety Belts Keep belts clean and dry. { WARNING

Do not bleach or dye safety belts. It may severely weaken them. In a crash, they might not be able to provide adequate protection. Clean safety belts only with mild soap and lukewarm water.

Do not use cleaners that increase gloss, especially on the instrument panel. Reflected glare can decrease visibility through the windshield under certain conditions. Notice: Use of air fresheners may cause permanent damage to plastics and painted surfaces. If an air freshener comes in contact with any plastic or painted surface in the vehicle, blot immediately and clean with a soft cloth dampened with a mild soap solution. Damage caused by air fresheners would not be covered by the vehicle warranty.

Instrument Panel, Leather, Vinyl, & Other Plastic Surfaces Use a soft microfiber cloth dampened with water to remove dust and loose dirt. For a more thorough cleaning, use a soft microfiber cloth dampened with a mild soap solution. Notice: Soaking or saturating leather, especially perforated leather, as well as other interior surfaces, may cause permanent damage. Wipe excess moisture from these surfaces after cleaning and allow them to dry naturally. Never use heat, steam, spot lifters or spot removers. Do not use cleaners that contain silicone or wax-based products. Cleaners containing these solvents can permanently change the appearance and feel of leather or soft trim and are not recommended.

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10-104

Vehicle Care

Floor Mats

{ WARNING

If a floor mat is the wrong size or is not properly installed, it can interfere with the pedals. Interference with the pedals can cause unintended acceleration and/or increased stopping distance which can cause a crash and injury. Make sure the floor mat does not interfere with the pedals.

Use the following guidelines for proper floor mat usage.

The original equipment floor mats were designed for the vehicle. If the floor mats need replacing, it is recommended that GM certified floor mats be purchased. Non-GM floor mats may not fit properly and may interfere with the pedals. Always check that the floor mats do not interfere with the pedals. . Use the floor mat with the

correct side up. Do not turn it over.

. Do not place anything on top of

the driver side floor mat.

. Use only a single floor mat on

the driver side.

. Do not place one floor mat on

top of another.

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Service and Maintenance

General Information

General Information . . . . . . . . . . 11-1

Maintenance Schedule

Maintenance Schedule . . . . . . . 11-3

Special Application Services

Special Application

Services . . . . . . . . . . . . . . . . . . . . 11-8

Additional Maintenance and Care

Additional Maintenance

and Care . . . . . . . . . . . . . . . . . . . 11-9

Recommended Fluids, Lubricants, and Parts

Recommended Fluids and

Lubricants . . . . . . . . . . . . . . . . . 11-12

Maintenance Replacement

Parts . . . . . . . . . . . . . . . . . . . . . . 11-15

Maintenance Records

Maintenance Records . . . . . . 11-16

Service and Maintenance

11-1

General Information This maintenance section applies to vehicles with a gasoline engine. For diesel engine vehicles, see the maintenance schedule section in the Duramax Diesel Supplement. Your vehicle is an important investment. This section describes the required maintenance for the vehicle. Follow this schedule to help protect against major repair expenses resulting from neglect or inadequate maintenance. It may also help to maintain the value of the vehicle if it is sold. It is the responsibility of the owner to have all required maintenance performed. Your dealer has trained technicians who can perform required maintenance using genuine replacement parts. They have up‐to‐date tools and equipment for fast and accurate diagnostics. Many dealers have extended evening and Saturday

hours, courtesy transportation, and online scheduling to assist with service needs. Your dealer recognizes the importance of providing competitively priced maintenance and repair services. With trained technicians, the dealer is the place for routine maintenance such as oil changes and tire rotations and additional maintenance items like tires, brakes, batteries, and wiper blades. Notice: Damage caused by improper maintenance can lead to costly repairs and may not be covered by the vehicle warranty. Maintenance intervals, checks, inspections, recommended fluids, and lubricants are important to keep the vehicle in good working condition. The Tire Rotation and Required Services are the responsibility of the vehicle owner. It is recommended to have your dealer perform these services every 12 000 km/7,500 mi.

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11-2

Service and Maintenance

Proper vehicle maintenance helps to keep the vehicle in good working condition, improves fuel economy, and reduces vehicle emissions. Because of the way people use vehicles, maintenance needs vary. There may need to be more frequent checks and services. The Additional Required Services ‐ Normal are for vehicles that: . Carry passengers and cargo within recommended limits on the Tire and Loading Information label. See Vehicle Load Limits on page 9‑16.

. Are driven on reasonable road

surfaces within legal driving limits.

. Use the recommended fuel. See Recommended Fuel on page 9‑68.

Refer to the information in the Maintenance Schedule Additional Required Services ‐ Normal chart. The Additional Required Services ‐ Severe are for vehicles that are: . Mainly driven in heavy city traffic

in hot weather.

. Mainly driven in hilly or

mountainous terrain. Frequently towing a trailer.

. Used for high speed or

competitive driving.

. Used for taxi, police, or delivery

service.

Refer to the information in the Maintenance Schedule Additional Required Services ‐ Severe chart.

{ WARNING

Performing maintenance work can be dangerous and can cause serious injury. Perform maintenance work only if the required information, proper tools, and equipment are available. If they are not, see your dealer to have a trained technician do the work. See Doing Your Own Service Work on page 10‑4.

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Maintenance Schedule

Owner Checks and Services

At Each Fuel Stop . Check the engine oil level. See

Engine Oil on page 10‑7.

Once a Month . Check the tire inflation

pressures. See Tire Pressure on page 10‑58. Inspect the tires for wear. See Tire Inspection on page 10‑65.

. Check the windshield washer

fluid level. See Washer Fluid on page 10‑26.

Engine Oil Change When the CHANGE ENGINE OIL SOON message displays, have the engine oil and filter changed within the next 1 000 km/600 mi. If driven under the best conditions, the engine oil life system might not indicate the need for vehicle service

Service and Maintenance

11-3

for more than a year. The engine oil and filter must be changed at least once a year and the oil life system must be reset. Your trained dealer technician can perform this work. If the engine oil life system is reset accidentally, service the vehicle within 5 000 km/3,000 mi since the last service. Reset the oil life system when the oil is changed. See Engine Oil Life System on page 10‑10. Tire Rotation and Required Services Every 12 000 km/ 7,500 mi Rotate the tires, if recommended for the vehicle, and perform the following services. See Tire Rotation on page 10‑65. . Check engine oil level and oil

life percentage. If needed, change engine oil and filter, and reset oil life system. See Engine Oil on page 10‑7 and Engine Oil Life System on page 10‑10.

. Check engine coolant level. See Engine Coolant on page 10‑19. . Check windshield washer fluid

level. See Washer Fluid on page 10‑26.

. Visually inspect windshield

wiper blades for wear, cracking, or contamination. See Exterior Care on page 10‑98. Replace worn or damaged wiper blades. See Wiper Blade Replacement on page 10‑36.

. Check tire inflation pressures.

See Tire Pressure on page 10‑58. Inspect tire wear. See Tire Inspection on page 10‑65.

. Visually check for fluid leaks.

Inspect engine air cleaner filter. See Engine Air Cleaner/Filter on page 10‑17. Inspect brake system.

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11-4

Service and Maintenance

. Visually inspect steering, suspension, and chassis components for damaged, loose, or missing parts or signs of wear. See Exterior Care on page 10‑98.

. Check restraint system

components. See Safety System Check on page 3‑20.

. Visually inspect fuel system for

damage or leaks.

. Visually inspect exhaust system

and nearby heat shields for loose or damaged parts. Lubricate body components. See Exterior Care on page 10‑98.

. Check starter switch. See Starter

. Check accelerator pedal for

Switch Check on page 10‑35. . Check automatic transmission shift lock control function. See Automatic Transmission Shift Lock Control Function Check on page 10‑35.