1993 Chevrolet Suburban Owners Manual

6-5

Service & Appearance Care

vehicle’s three-way catalytic All of that means costly

oil can deteriorate quickly. Your

Fuels in Foreign Countries US. or Canada, If you plan on driving in another country outside the unleaded fuel may be hard to find. Do not use leaded gasoline. If you use even one tank full, your emission controls won’t work well or at all. With continuous use, spark plugs can get fouled, the exhaust system can corrode, and your engine converter and oxygen sensor will be damaged. repairs that wouldn’t be covered by your warranty. To check on fuel availability, ask company that does business in the country where you’ll be driving. You can also write us at the following address for advice. you’re going and give your Vehicle Identification Number General Motors of Canada Ltd. International Export Sales Post Office Box 828 Oshawa, Ontario L1H 7N1, Canada

an auto club, or contact a major oil

Just tell us where (VIN).

Fi/ling Your Tank

The fuel cap is behind a hinged door on the left side off the cap, turn

it slowly to the left (counterclockwise).

of your vehicle. To take

PO444

6-6

A Gasoline vapor is highly flammable.

cause very bad injuries. Don’t smoke refueling your vehicle. Keep sparks, flames, and smoking materials away from gasoline.

It burns violently, and that can if you’re near gasoline or

I .

PO485

A If you get gasoline on you and then something ignites it, you could

too quickly. This spray can happen is more likely

be badly burned. Gasoline can spray out on you filler cap full, and and wait for any “hiss” noise Then unscrew the cap all the way. When you put the cap back a clicking noise.

to stop.

in hot weather. Open the

on, turn it to the right (clockwise) until you hear

if your tank

if you open the fuel is nearly fuel filler cap slowly

I NOTICE

6-7

Service & Appearance Care

Checking Things Under the Hood

a&

. .

Hood Release To open the hood, first front of the vehicle and pull

pull the handle inside the vehicle. Then go

up on the secondary hood release. Lift the hood.

to the

.. .

PO21 7

CAUTION A If your vehicle h;-

,can start up and injure you even when the engine

air conditioning, the auxiliary fan under the hood is not runninc

*y,?*& 8gKeep your hands, clothing and tools awav from anv underhoo Wk%selectric fan,

you have one

6-8

~ A U T I O N

- Things that burn can get on hot engine parts and start a fire. These oil, coolant, brake fluid, windshield

include liquids like gasoline, washer and other fluids, and plastic be burned. Be careful not to drop or spill things that will burn onto a

or rubber. You or others could

Before closing the hood, be sure pull the hood down and close it firmly. Engine Oil It's a good idea to check your engine get an accurate reading, the level ground.

all the filler caps are on properly. Then just

oil every time you get fuel.

In order to

oil must be warm and the vehicle must be on

Turn off the engine and give the oil pan. If you don't, the oil dipstick might not

oil a few minutes to get back

down into the

show the actual level.

6-9

I

K2613

it with a paper towel

it back in all the way. Remove it again, keeping the tip

To Check Engine Oil: Pull out the dipstick and clean or cloth, then push lower. When to Add Oil: If the oil is at to add some oil. But you must use the right kind. This part explains what kind of oil to use. For crankcase capacity, see “Capacities and Specifications” in the Index.

or below the ADD mark, then you’ll need

I Don’t add too much oil. gets above the upper mark that engine

If your engine has

so much oil that the

oil level

shows the proper operating range, your

6-1 0

Just fill it enough to put the level somewhere Push the dipstick all the way back in when

in the proper operating range.

you’re through.

K2390

6-1 1

Service & Appearance Cam

What Kind of Oil to Use: Look for three things:

K2543

SG SG must be on the oil container, either by itself or combined with other quality designations, such as W C C , SG/CD, SF, SG, CC, etc. These letters show American Petroleum Institute (API) levels

of quality.

I NOTICE f you use oils that don’t have mgine damage not covered by your warranty.

the “SG” designa..-.., , - J can cause

6-1 2

SAE 5W-30 Vehicles with Light Duty Emissions (8500 GVWR or less). As shown in this chart, SA€ 5W-30 is best for your vehicle. However, you can use SAE 1OW-30 if it's going to be 0°F (-18°C) or above.

6-1 3

Service & Appearance Care

SAE IOW-30 Vehicles with Heavy Duty Emissions As shown in this chart, SAE 1OW-30 is best for your vehicle. However, you can use SAE 5W-30 if it's going to be colder than 60°F (16°C) before your next oil change. When it's very should use SAE 5W-30.

(8501 G W R or more).

cold, below 0°F (-18"C), you

6-14

oil container show its viscosity, or

These numbers on an Do not use other viscosity oils such Energy Conserving Oils with these words on the container will help you save fuel.

II

thickness.

as SAE 1OW-40 or SAE 2OW-50.

oil container, and use only those oils that

This doughnut-shaped logo (symbol) is used on most oil containers to help you select the correct oil, You should look for this on the display the logo. GM Goodwrench@ oil (in Canada, GM Engine Oil) meets all the requirements for your vehicle. Engine Oil Addifives: Don't add anything to your oil. something should be added. When to Change Engine Oil: See if any one of these is true for you;

Your GM dealer is ready to advise

if you think

low speed most of the time

4 miles (6 km). Most trips are less than It's below freezing outside and most trips are The engine is at delivery, or in stop-and-go You tow a trailer often. Most trips are through dusty places. The vehicle is frequently operated off-road.

traffic),

less than 10 miles (16 km). (as in door to door

oil

(8500 GVWR or

is true for your vehicle, then you need to change your

If any one of these and filter every 3,000 miles (5000 km) or 3 months-whichever comes first. Vehicles with Light Duty Emissions If none of them is true, change the months-whichever comes first. Change the filter at the first every other oil change after that. Vehicles with Heavy Duty Emissions If none of them months-whichever comes first. Change the filter at the first every other oil change after that

is true, change the oil every 6,000 miles (1 0 000 km) or 12 oil change and at

oil every 7,500 miles (1 2 500 km) or 12 oil change and at

if mileage determines when you change your

(8501 GVWR or more).

less).

6-1 5

Service & Appearance Care

oil. If time determines when you change your oil, change the filter each time you change your oil. Engine Block Heater: An engine block heater can be cold weather, 0°F (-18°C) or colder. If your vehicle has this option, see “Engine Block Heater” in the Index. What to Do with Used Oil:

a big help if you have

to park outside

in very

in

very long.

soap and water, or a good hand

used oil stay on your skin for

Used engine oil contains things that have caused skin cancer laboratory animals. Don’t let Clean your skin and nails with cleaner. Wash or properly throw away clothing or rags containing-:’-:;$ .. used engine oil. .. , - . f .- , L ., -.. : j ,! If YOU change your own oil, Used oil can be be sure to drain all free-flowing oil from the filter before disposal. Don’t ever dispose of oil by putting it in the trash, pouring it on the ground, into sewers, or into streams or bodies of water. Instead, recycle it to a place that collects used oil. If you have a problem properly disposing of your used oil, ask your dealer, a service station or a local recycling center for help. Air Cleaner

a real threat to the environment.

it by taking

- J ’,: ._ ..:.: ;,i, j

. ,A:<< --.

,,::

:‘:-;

L .

Refer to the Maintenance Schedule to determine when cleaner filter and crankcase ventilation filter. See “Scheduled Maintenance Services” in the Index.

to replace the air

PO21 6

6-1 6

I CAUTION I 10 Operating the engine with the air cleaner

to be burned. The air cleaner not only cleans the air, it if the engine backfires. could be burned. Don’t drive with it the engine with the air cleaner

off.

If it isn’t there, and the engine backfires,

off, and be cr-ful working on

stops flame y(--

off can cause you or others

~ NOTICE If the air cleaner dirt can easily get into your engine, which will damage it. Always have the air cleaner in place when you’re driving.

is off, a backfire can cause a damaging engine fire. And,

is when the

to determine when

on a gas engine, turn the wing nuts

Ib remove the air cleaner filter counterclockwise. Remove the cover and change the filter. Automatic Transmission Fluid When to Check and Change: A good time to check your automatic transmission fluid level engine oil is changed. Refer to the Maintenance Schedule to change your fluid. See “Scheduled Maintenance Services” in the Index. How to Check: Because this operation can be a little difficult, you may choose to have this done at a General Motors dealership Sewice Department. If you do it yourself, be sure to follow all the instructions here, get a false reading on the dipstick.

or you could

NOTICE

I Too much or too little fluid can damage your transmission. Too much can I starting a fire. Be sure to get an accurate reading

fail on hot engine parts, if you check-your

fluid could come out and

mean that some of the

transmission fluid.

least 30 minutes before checking the transmission fluid

Wait at have been driving:

level if you

When outside temperatures are above At high speed for quite a while. In heavy traffic-especially in hot weather. While pulling a trailer.

90°F (32°C).

6-1 7

Service & Appearance Care

To get the right reading, the fluid must be at normal operating temperature, which is 180°F to 200°F (82°C to 93°C). To check the transmission fluid hot: Get the vehicle warmed up by driving about 15 miles (24 km) when outside temperatures are above it's colder than 50°F (lO°C), drive the vehicle in temperature gage moves and then remains steady for ten minutes. Then follow the hot check procedures. To check transmission fluid cold: A cold check is made after the vehicle has been sitting for eight hours or more with the engine as a reference. Let the engine run at idle for temperatures are 50°F (IO'C) or more. If may have added during a cold check. To check the fluid hot or cold:

five minutes if outside

to idle the engine longer.

A hot check must

follow when fluid is

0 (3rd gear) until the engine

it's colder than 50°F (1 O'C), you

off and is used only

50°F (10°C). If

a level place.

P (Park) with the parking brake applied.

Park your vehicle on Place the shift lever in With your foot on the brake pedal, move the shift lever through each gear range, pausing for about three seconds position the shift lever in Let the engine run at idle for

three minutes or more.

P (Park).

in each range. Then,

Then, without shutting off the engine, follow these steps: wipe it with a 1. Flip the handle up and then pull out the dipstick and

clean raa or DaDer towel.

PO229 2. Push it back in all the way, wait three seconds and then pull it back out

again.

6-1 8

3. Check both sides of the dipstick, and read the lower

level must be in the cross-hatched area for a hot check.

COLD area for a cold check or

PO053

level, The fluid in the HOT area or

4. If the fluid level is where it should be, push the dipstick back in

way; then flip the handle

down to lock the dipstick

in place.

all the

of transmission

to determine what kind

HOW To Add Fluid: Refer to the Maintenance Schedule fluid to use. See “Recommended Fluids and Lubricants” in the Index. If the fluid level is low, add only enough of the proper fluid to bring the level up to the COLD area for a cold check or the HOT area for a hot check. It doesn’t take much fluid, generally less than recommend you use only label are especially made for your automatic transmission. Damage caused by fluid other than DEXRON@llE is not covered by your new vehicle warranty. “How To

fluid labeled DEXRON@IIE, because fluids with that

a pint. Don’t overfill. We

as described under

After adding fluid, recheck the fluid level Check”. When the correct way; then flip the handle down

fluid level is obtained, push the dipstick back

in all the

to lock the dipstick

in place.

6-1 9

Service & Appearance Cam

Manual Transmission Fluid When to Check: A good time to have it checked the fluid How to Check: Because this operation can be done at your dealership Service Department. If you do it yourself, be sure get a false reading.

in your manual transmission doesn’t require changing.

is when the engine

oil is changed. However,

a little difficult, you may choose to have this

to follow all the instructions here, or

you could

1 Too much or too little fluid can damage your transmission. Too much can 1

I Y W I ILL

mean that some of the fluid could come out and fall on starting a fire. Be sure to get an accurate reading transmission fluid,

hot engine parts,

if you check your

fluld level only when your engine is

off, the vehicle

cool enough for you

to rest your fingers

is parked on a

Check the level place and the transmission is on the transmission case. Then, follow these steps:

~~~~

1. Remove the filler plug. 2. Check that the lubricant level 3. If the

fluid level is good, install the plug and be sure it is fully seated. fluid as described in the next steps.

the fluid level is low, add more

is up to the bottom of the filler plug hole. If

K24

6-20

How to Add Fluid: Here’s how what kind of fluid to use. See “Recommended Fluids and Lubricants” Index.

to the Maintenance Schedule to determine

to add fluid. Refer

in the

1. Remove the filler plug. 2. Add fluid at the filler plug hole. Add only enough fluid to bring the fluid

level up

to the bottom of the filler plug hole.

3. Install the filler plug. Be sure that the filler plug is fully seated. Hydraulic Clutch

The hydraulic clutch (1/2 inch to an inch)

in your vehicle in the pedal is normal.

is self-adjusting. A slight amount of play

6-21

Service & Appearance Cave

When to Check and What to Use:

your clutch master cylinder reservoir and what

Refer to the Maintenance Schedule to determine how often the fluid level in "Owner Checks and Services" and "Recommended Fluids and Lubricants" the Index. Now to Check:

K2343 you should check

to add. See

in

The proper fluid should be added the diaphragm when it's reservoir cap.

if the level does not reach the bottom

in place in the reservoir. See the instructions on the

K2344 of

6-22

ball

for lubricating the clutch fork to lubricate the clutch

Hydraulic Clufch Grease Fittrhg A grease fitting is on the clutch housing stud. See your Maintenance Schedule for when housing. See “Recommended Fluids and Lubricants” in the Index for the proper lubricant to use. Be sure not to over-fill because you could damage your clutch. Four- Wheel Drive Most lubricant checks in this section However, they have Transfer Case When to Check Lubricant: Refer to the Maintenance Schedule to determine how often to check the lubricant. See “Periodic Maintenance Inspections” in the Index. How to Check and Add Lubricant:

two additional systems that need lubrication.

also apply to four-wheel-drive vehicles.

Ti

PO230

of the filler plug hole, you’ll need to add

to the bottom of the

If the level is below the bottom some lubricant. Add enough lubricant to raise the level filler plug hole. What to Use: Refer to the Maintenance Schedule use. See “Recommended Fluids and Lubricants” in the Index.

to determine what kind

of lubricant to

6-23

Service & Appearance Care

Front Axle When to Check and Change Lubricant: Refer to the Maintenance Schedule to determine how often lubricant and when to change it. See “Scheduled Maintenance Services” in the Index. How to Check Lubricant:

to check the

PO231

to raise the level

to 1/2 inch

to add (warm), add

to the bottom of the filler plug hole.

is below the bottom of the filler plug hole, you’ll need

the filler plug hole.

If the level some lubricant. If the differential is at operating temperature enough lubricant to raise the level If the differential is cold, add enough lubricant (12 mm) below What to Use: Refer to the Maintenance Schedule use. See “Recommended Fluids and Lubricants” in the Index. Rear Axle When to Check and Change Lubricant: Refer to the Maintenance Schedule lubricant and when in the Index.

to determine how often to check the to change it. See “Recommended Fluids and Lubricants”

to determine what kind of

lubricant to

6-24

How to Check Lubricant:

PO592

to raise the level

is below the bottom

to the bottom of the

of the filler plug hole, you’ll need to add

If the level some lubricant. Add enough lubricant filler plug hole. What to Use: Refer to the Maintenance Schedule use. See “Recommended Fluids and Lubricants” Engine Coolant

to determine what kind

of lubricant to

in the Index.

PO593

6-25

Service & Appearance Care

The following explains your cooling system and how to add coolant when low. If you have a problem with engine overheating, see “Engine Overheating” in the Index. The proper coolant for your vehicle Give freezing protection down Give boiling protection up Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning lights and gages work

will: to -34°F (-37°C).

to 258°F (125°C).

as they should.

it is

What to Use: Use a mixture of clean water (preferably distilled), and antifreeze that meets “GM Specification 6038-M,” which won’t damage aluminum GM Engine Coolant Supplement (sealer) with you use these, you don’t need

a complete coolant change.

to add anything else.

parts. Also use If

to your cooling system can

Adding only plain water Plain water, or some other liquid like alcohol, can boil before the proper coolant mix will. Your vehicle’s coolant warning system for the proper coolant mix. With plain water engine could get too hot but you wouldn’t get the overheat warning. Your engine could catch fire and you or others could be burned. Use a 50/50 mix of clean water and a proper antifreeze.

or the wrong mix, your

be dangerous.

is set

.. ..

jIi ,yo.w use an improper coolant mix, your engine .coutd overheat andi badly damaged. The repair cost wouldn’t be covered by your warranty.’ T P ~ much water in ;the mix can freeze and crack the engine, radiator, wre-ad -.other parts. Some conditions, such as air trapped coolant level in the radiator. Check the coolant level when the engine is and follow the steps under “Adding Coolant” for the proper coolant. If you have to add coolant mdre than four times check your cooling system.

in the cooling system, can affect the

a year, have your

way to add

.heater

dealer

cold

6-26

k

NOTICE f YOU use the proper coolant, you don’t have to idditives which claim

to improve the system. These can be harmful

add extra inhibitors or

Adding Coolant

‘1 L

PO206

be at

the coolant level should

To Check Coolant: When your engine is cold, COLD, or a little higher. When your engine is warm, the level should be up to HOT, or a little higher. To Add Coolant: If you need more coolant, add the proper mix at the coolant recovery tank. I CAUTION 4 Turning the radiator pressure cap when the engine and radiator are

hot can allow steam and scalding liquids badly. With the coolant recovery tank, you will almost never have add coolant at the radiator. Never turn cap-even a little-when the engine

to blow out and burn you to

the radiator pressure

and radiator are

the recovery tank, but be careful not

hot. to spill it.

Add coolant mix at 1 CAUTION - b contains ethylene glycol, and

~~

You can be burned if you spill coolant on hot engine parts. Coolant it will burn if the engine parts are hot a hot engine.

enough. Don’t spill coolant

on

6-27

Service & Appearance Care

Radiator Pressure Cap

I I

1 NOTICE

K2515

four radiator pressure cap nust be tightly installed to prevent coolant

is a 15 psi (105 kPa) pressure-type cap and

loss and possible engine

mage from overheating. Be sure the arrows on the cap line up with

werffow tube on the radiator filler neck.

-m

Thermostat Engine coolant temperature is controlled system. The thermostat stops the coolant reaches a preset temperature. When you replace

recommended.

by a thermostat in the engine coolant flow of coolant through the radiator until the

your thermostat, an AC@ thermostat is recommended.

6-28

Power Steering Fluid

How To Check Power Steering Fluid: Unscrew the cap and wipe the dipstick with a and completely tighten it. Then remove the cap again and level on the dipstick.

clean rag. Replace the cap

look at the fluid

K2630

When the engine compartment mark. When the engine compartment COLD mark.

is hot, the level should be at

the FULL

K2693

is cool, the level should be at the

FULL

6-29

Service & Appearance Care

.. c

What to Add: Refer to the Maintenance Schedule to determine what kind See “Recommended Fluids and Lubricants” in the Index.

NOTICE When adding power steering fluid always use the proper fluid. Failure leaks and damage hoses

and seals.

or making a complete fluid change, to use the proper fluid can cause

K2694

of fluid to use.

6-30

Windshield Washer Fluid To Add: Open the cap labeled WASHER FLUID ONLY. Add washer fluid until the bottle is full.

6-31

Service & Appearance Care

Brake Master Cylinder Your brake master cylinder is here.

It is filled with DOT-3 brake fluid.

K2470

wear. When new

fluid level in your master cylinder

is that the brake fluid goes down to an acceptable

There are only two reasons why the brake might go down. The first level during normal brake lining level goes back up. The other reason is system. If it is, you should have your brake system fixed, since a leak means that sooner or later your brakes won’t work well, or won’t work at all. isn’t a good If you add fluid when your linings are worn, then you’ll have a leak. much fluid when you get new brake linings. You should add (or remove) brake fluid, as necessary only when work system.

idea to “top off your brake fluid. Adding brake fluid won’t correct too

is done on the brake hydraulic

linings are put in, the fluid is leaking out of the brake

that fluid

So, it

If you---have too much brake fluid, will b u r n h h e engine is hot enough. and your vehicle could be damaged. Add brake fluid only when work is done on the brake hydraulic system.

it can spill on the engine. The fluid

You or others could be burned,

to determine when to check your brake

Refer to the Maintenance Schedule fluid. See “Periodic Maintenance” To Check Brake Fluid: You can check windows on the brake fluid reservoir. The fluid levels should be above the mark. If they aren’t, have your brake system checked to see

the brake fluid without taking

in the Index,

off the cap. Just look at the

MIN

if there is a leak.

6-32

of each window.

After work is done on the brake hydraulic system, make sure the levels are above MIN and below the top What To Add: When you do need brake fluid, use only DOT-3 brake fluid-such as Delco Supreme 11 @ (GM Part No. 1052535). Use new brake fluid from a sealed container only. NOTICE

DOT-5 silicone brake fluid can damage your vehicle. Don’t use Don’t let someone put in the wrong kind of fluid. For example, just a few drops of mineral-based oil, such as engine oil, -]stem can damaae brake svstem parts be replaced. Brake fluid can damage paint, your vehicle.

so be careful nor IO spit1 Drake

so badlv that 1

in your brake

fll have to

it.

fluid on

or adding fluid.

top quality and work well together

Hydro-Boost Brake System (Hydraulic Pump) The power steering pump is also used as the Hydro-boost pump. Refer to “Power Steering System” in this section when checking fluid level Replacing Brake System Parts The braking system on a modern vehicle is complex. Its many parts have to is to have really good be of braking. Vehicles we design them, as your braking system-for example, when your brake have to have new ones put in-be sure you get new genuine replacement parts. If example, if someone puts balance between your front and rear brakes can change, for the worse. The braking performance you’ve come to expect can change in many other ways if someone puts

replace parts of your linings wear down and you

in brake linings that are wrong for your vehicle, the

and test have top-quality GM brake parts

in the wrong replacement brake parts.

no longer work properly. For

you don’t, your brakes may

it is new. When you

vehicle does when

if the vehicle

GM

in

6-33

Service & Appearance Care

tell you how often to lubricate the fittings. See

Front Suspension and Steering Linkage Your maintenance schedule will “Recommended Fluids and Lubricants” in the Index for the proper lubricant to use. Front Wheel Bearings Your vehicle has front wheel bearings that must be cleaned and repacked. Your maintenance schedule will Front Shock Absorbers The front shock absorbers of your vehicle vehicle ride smoothly and also control the travel When the shock absorbers are serviced, any replacement shock absorbers must be the same as the original equipment shock absorbers in both extended length and strength.

tell you how often this must be done.

do many things. They help the

of the suspension system.

at the first 100, 1,000 and 6,000 miles (160, 1600 and

Wheel Nut Torque For vehicles with dual wheels, when the vehicle, wheel or fasteners are new, have the torque set 9600 km). Use the torque specified in the appropriate Specification Chart later in this section. Single Belt Accessory Drive If your new vehicle uses a serpentine belt, than systems with several belts. The belt runs over or around the pulleys on the engine. to keep the belt tight at all times. The tensioner also makes replacing the belt easier. If you need replacement belt. Your dealership or parts supplier can help you with this. The Accessory Drive Belt Routing label on your vehicle will show you how to route the belt your vehicle uses.

to replace the belt, be sure to get the correct

it is lighter, and more durable

A tensioner is used

6-34

Windshield Wiper Blade lnserfs

PO232

of the insert

in place,

If you think the system it out as soon as possible.

is not

is below 40°F (4°C).

lift the wiper arm and rotate the

then have your dealership check your air conditioning system

To replace the windshield wiper blade insert, blade until it is facing away from the windshield. Unlatch the end from the holding clips. Remove the insert and slide a new one Make sure the blade is secured in the clips. Air Conditioning Every now and to be sure it has not lost any cooling ability, working properly, have your dealership check The air conditioning will not work when the temperature Fluid Leak Check After the vehicle has been parked for a while, inspect the surface under the vehicle for water, oil, fuel or other fluids. Water dripping from the air conditioning system after or fumes, Lubrication Accelerator Control System Your maintenance schedule will tell pivot points must be lubricated. See “Recommended Fluids and Lubricants” the Index for Accelerator cables and cruise control cables should not be lubricated. Any cables that are worn or are hard

the causes should be found and corrected at once.

the proper lubricant to use.

to pull should be replaced.

it has been used is normal.

you how often the accelerator linkage

If you notice fuel leaks

in

6-35

Service & Appearance Care

in the

in the

use.

use.

if they are not lubricated.

Hood Laiches and Hood Hinge Your maintenance schedule will tell you how often to lubricate the hood latch and hood hinge assembly. See “Recommended Fluids and Lubricants” Index for the proper lubricant to Propeller Shaft Slip Splines See your maintenance schedule to find out how often the slip splines must be lubricated, See “Recommended Fluids and Lubricants” in the Index for the proper lubricant to use. Constant Velocity Joints See your maintenance schedule to find out how often the constant velocity joints must be lubricated. See “Recommended Fluids and Lubricants” Index for the proper lubricant to Body Normal use of your vehicle will cause metal to metal wear at some points on the cab and body For exposed surfaces, such as door checks, door lock bolts, lock striker plates, dovetail bumper wedges, etc., a thin film applied. The seat adjusters and seat track should be lubricated with chassis grease, Door weather strips and rubber hood bumpers should be lightly coated with a rubber lubricant. Never use too much lubricant when you are finished. Your maintenance schedule will See “Recommended Fluids and Lubricants” lubricant to use. Lock Cylinders To be sure your locks operate properly, they must be lubricated, vehicle’s maintenance schedule will “Recommended Fluids and Lubricants” use. You should not use penetrating oils because they could installed lubricant and cause the lock could also wash away the lubricant, using a de-icer of this type.

of any lubricant and be sure to wipe up any extra

tell you how often to lubricate these items.

in the Index for the proper lubricant

of engine oil should

in the Index

Your

for the proper

be

wash out the factory

to bind. De-icers which contain alcohol so be sure

to lubricate the lock after

tell you how often to lubricate them. See

to

6-36

your vehicle should be lubricated to keep

tell you how often to lubricate the handle.

in the Index for the proper

Tailgate Handle The tailgate handle pivot points on it working smoothly. Your maintenance schedule will See “Recommended Fluids and Lubricants” lubricant to use. Efectricaf System Battery Every new GM vehicle has to one of these, add water a Delco Freedom@ battery. the original battery’s label. Vehicle Storage If you’re not going to drive black, negative (-) from running down. CAUTION 1 Batteries have acid that can burn you and gas that can explode. , - , can be badly hurt if you aren’t careful. See “Jump Starting”

cable from the battery. This

your vehicle for 25 days or more, take

a Delco Freedom@ battery. You never have When it’s time for a new battery, we recommend Get one that has the catalog number shown on

Index for tips on working around a battery without getting hurt.

will help keep your battery

off the

to

You I

in the

how to prepare your vehicle for longer periods.

your dealer to learn on'^ Bulb Rep/acement Before you replace any bulbs, be sure that all the engine isn’t running.

lights are off and the

6-37

Service & Appearance Care

Sealed Beam Headlights

-.

1. Remove the four screws from the headlight retainer. 2. Pull the headlight out and remove the retainer. 3. Unplug and remove old headlight. 4. Plug in the new headlight 5. Install the retainer 6. Install the screws.

and put it in place.

to the headlight.

Halogen Bulbs CAUTION

Halogen bulbs have pressurized gas inside and can burst or scratch the bulb. You or others could be injured. of halogen bulbs. when handling and disposing

if you drop Take special car€

NOTICE Avoid touching the bulb or Oil from your skin or moisture on the to explode when it is turned on. If either comes in contact with the bulb. clean it v alcohol or

suitable deareaser and wiDe the bulb dry.

letting it come in contact with anything da.. . ~ -

bulb can cause the bulb

6-38

Composite Headlights

PO2

at the top of the radiator support.

out.

1. Remove the two screws 2. Pull the composite headlight lens 3. Unplug the electrical connector. 4. Turn the bulb counterclockwise and remove it. 5. Put the new bulb in and 6. Plug in the electrical connector. 7. Put the headlight back

into the vehicle and

turn it clockwise until it is tight.

tighten the two screws.

6-39

Service & Appearance Care

Front Parkingflurn Signal Lights

1. Remove the screws and take out the parkinglturn signal light assembly,

K2681

2. Squeeze the tab on the side

of the light socket while turning the socket

counterclockwise. 3. Pull out the socket. 4. Push in gently on the bulb, turn it counterclockwise and remove

it from

the socket.

6-40

5. Put the new bulb into the socket, gently press in on the bulb and turn it

clockwise until it is tight.

6. Put the socket back into the light assembly and turn it clockwise

locks.

until it

7. Put the parkinghurn signal light assembly back into the vehicle and

tighten the screws. Side Marker Bulb

1 Remove the screws and 2. Reach through the opening and turn the side marker bulb socket

pull out the parkinglturo signal

light assembly.

counterclockwise and remove it.

3. Pull the bulb straight out of the socket. 4. Put a new bulb into the socket and push it in until 5. Put the socket back into the side marker assembly and turn

to tighten it.

it is tight.

it clockwise

6. Replace the parkinglturn signal light assembly and tighten

the screws.

6-41

Roof Marker Lights

lift off the lens.

1. Remove the screws and 2. Pull the bulb straight out of the socket 3. Put a new 4. Replace the lens and tighten the screws.

bulb into the socket and push it in until it is tight.

Rear Lights

Open the tailgate or rear doors.

PO498

6-42

2. Remove the two black plastic plugs

holes.

in the rear light assembly access

3. Remove the two rear light assembly screws inside the fender and pull

You may want to use a magnetic screwdriver

out the light assembly. when removing the screws.

4. Remove the screws from the bulb retainer and take the bulb retainer

of the light assembly.

PO499 off

of the socket and push it in until it is tight.

5. Pull the old bulb straight out 6. Put in a new bulb 7. Replace the bulb retainer. 8. Replace the rear light assembly and tighten the screws. to use a magnetic screwdriver when installing the screws.

You may want

in your vehicle are protected from short circuits

9. Close the tailgate or rear doors. Fuses and Circuit Breakers The wiring circuits combination of fuses, circuit breakers, and fusible thermal links in the wiring itself. This greatly reduces the chance See “Fuses and Circuit Breakers” Headlights The headlight wiring is protected by a circuit breaker electrical overload will cause the lights remain off. If this happens, have your headlight wiring checked right away.

in the Index for more information.

to go on and

by a

in the light switch. An off, or in some cases to

of fires caused by electrical problems.

6-43

Service & Appearance Care

If

will stop until the

to heavy snow, etc., the wiper

is protected by a circuit breaker and a fuse.

is caused by some electrical problem and not it fixed,

Windshield Wipers The windshield wiper motor the motor overheats due motor cools. If the overload snow, etc., be sure to get Power Windows and Other Power Options Circuit breakers in the fuse panel protect the power windows the circuit breaker opens accessories. When the current load and closes, protecting the circuit until the problem is fixed or goes away. Trailer Wiring Harness The optional seven-wire trailer wiring harness is protected by in the battery feed wire. This fuse Wiring Harness” Fuse Block

is near the junction block. See “Trailer

in the Index for more information.

is too heavy,

an in-line fuse

and other power

, . . .

lW

-+

- =

. . . . . . . . .

K2644

is in the instrument panel on the driver’s side.

if you have one. To remove hold the end of the fuse between your thumb

The fuse block You can remove fuses with a fuse extractor, fuses if you don’t have one, and index finger and pull straight out. Be sure don’t have a spare fuse, you can “borrow” one some feature of your vehicle that you can get along without-like the radio or cigarette lighter-and use its fuse, if it is of the value you need. Replace as soon as you can. See “Fuses and Circuit Breakers” information.

If you ever have a problem

to use the correct fuse.

it in the Index for more

of the correct value. Just pick

on the road and

6 4 4

Exhaust System To help prevent damage your vehicle

if you notice:

to your exhaust system, do not continue

to drive

Engine misfiring Loss of performance Other unusual operating conditions

(OS) sensor that helps keep your engine’s

Have your engine and exhaust system serviced regularly. Three- Way Catalytic Converter Your vehicle’s three-way catalytic converter is designed to reduce the pollutants in your vehicle’s exhaust. Use only unleaded fuel in your vehicle. If you use leaded fuel, you could damage your three-way catalytic converter, and other engine components. Computer Command Control System This system has an oxygen air-fuel mixture at a proper level. Use only unleaded you use leaded fuel, you could damage your oxygen three-way catalytic converter. The Malfunction Indicator Lamp instrument panel lets you know when your emission control system needs service. The light will come on briefly when you start your engine to let you know that the system is working. If it does not come on when you start your engine, or if it comes on and stays on while you’re driving your system may need service. Your vehicle should still be driveable, but you should have system serviced right away. Secondary Air Injection (AIR) System You may have this system. It lets you know wiring harness or solenoid need service. (Service Englne Soon) comes on, you need service.

(SERVICE ENGINE SOON) on your

fuel in your vehicle. (OS) sensor and

if your engine control module,

If the Malfunction Indicator Lamp

If

your

645

Loading Your Vehicle

MFD BY GENERAL MOTORS CORP L-4

. , .. .-. ..

,. . ,FFECT

CROWN ABOVE. 1

XISPEED

TIRE SIZE

RIM

PSVKPA (COLD)

-EL

SPA

SEE OWNERS MANUAL FOR ADDITIONAL INFORMATION

K2134

of your vehicle. This is called the GVWR

is found on the rear edge of the driver's door. The

The Certificationflire label label shows the size of your original tires and the inflation pressures needed to obtain the gross weight capacity (Gross Vehicle Weight Rating). The GVWR includes the weight of the vehicle, all occupants, fuel and cargo. The Certificationnire label also tells you the and rear axles, called Gross Axle Weight Rating (GAWR). actual loads on your front and rear axles, you need to go to a weigh station and weigh your vehicle. Your dealer can help you with this. Be sure to spread out your load equally on both sides of the centerline. Never exceed the GVWR (GAWR) for either the front or rear axle. And, if you do have a heavy load, you should spread

for your vehicle, or the Gross Axle Weight Rating

maximum weights for the front To find out the

it out.

A Do not load your vehicle any heavier than the

GVWR or maximum front and rear GAWRs. If you do, parts on your vehicle can break, or could cause you life of your vehicle.

it can change the way your vehicle handles. These

to lose control. Also, overloading can shorten the

the

Using heavier suspension components not change your weight ratings. Ask your dealer to help you load your vehicle the right way.

to get added durability might

6-46

Your warranty does not

r-rer parts or co

ronents that fail because

~~

If you put things inside anything else-they will go as fast as the vehicle goes. or turn quickly, or if there is a crash, they’ll keep going.

your vehicle-like

suitmes, LWWIY, pac;Kages, or If you have to stop

Things you put inside your vehicle can strike and injure , sudden stop or turn, or in a crash.

people in a

9 Put things in the cargo area of your vehicle. Try to spread the the vehicle so

weight evenly. Never stack heavier things, like suitcases, inside that some of them are above the tops of the seats. When you carry something inside the vehicle, secure whenever you can. Don’t have a seat folded down unless you need

it

to.

Trailering Package

GROSS COMBINATION WEIGHT RATING

(GCWR)

If your vehicle comes with the Trailering Package, there is also which includes the weight called the Gross Combination Weight Rating

(GCWR).

of the vehicle and the trailer it tows. This rating is

PO340 a load rating

6-47

Service & Appearance Care

to include the weight of everything you of

of the people inside as part

it. And, remember to figure the weight

When you weigh your trailer, be sure put in your load. Your dealer can help you determine your Add-on Equipment When you carry removable items, like snow plow blades, you may need put a limit on how many people you carry inside your vehicle. Be sure you buy and install the new equipment. weigh your vehicle before NOTICE

GCWR.

to to

tires. Your new vehicle comes with high quality tires made by

rims We don’t make a leading tire manufacturer. These tires are warranted by the tire manufacturers and their warranties are delivered with every new vehicle. your spare tire is a different brand than your road tires, you will have warranty folder from each of these manufacturers.

If

a tire

6-40

Poorly maintained and improperly used tires are dangerous.

Overloading your tires can cause overheating as a result of too much friction. You could have an air-out and a serious accident. See “Loading Your Vehicle” Underinflated tires pose the same danger as overloaded tires. The resulting accident could cause serious frequently to maintain should be checked when your tires are cold,

injury. Check all tires the recommended pressure. Tire pressure

in the Index.

0 Overinflated tires are more likely to be cut, punctured,

by sudden impact, such as when you at the recommended pressure.

or broken hit a pothole. Keep tires

If your tread is badly worn,

have been damaged, replace them.

0 Worn, old tires can cause accidents,

or if your tires Even if it’s legal, don’t have 16 inch tires. See “Special Tire Inflation” loading and inflation pressures at speeds above

in this section for more information on

65 mph (105 kmh).

drive over 85 mph (135 kmh) if you

is on the rear edge

of the driver’s door, or in the cab, shows the correct inflation

Inflation-Tire Pressure The Certification/Tire label which on the incomplete vehicle document pressures for your tires, when they’re cold. “Cold” means your vehicle has been sitting for at least three hours You can operate some vehicles at reduced inflation pressures only when be carrying reduced loads. On those vehicles, the minimum cold inflation pressures for a typical reduced Pressure” label located on the driver’s door. Weigh the vehicle load on each tire and see the label for the minimum cold inflation pressures for that load.

load are printed on the “Improved Ride Tire to find the

or driven no more than a mile.

you’ll

6-49

Don’t let anyone tell you that underinflation or overinflation is all right. It’- 9 . If your tires don’t have enough air (underinflation)

you can get

Too much flexing Too much heat tire overloading Bad wear Bad handling Bad fuel economy.

too much air (overinflation), you can get:

I If your tires have Unusual wear Bad handling Rough ride Needless damage from road hazards.

nth or more. Also, check the

to check tire pressure.

tire pressure of the spare tire. How to Check: Use a good quality pocket-type gage Simply looking at the tires will not tell you the pressure, especially if you have radial tires-which may look properly inflated even underinflated. If your tires have valve caps, be sure to put them back on. They help prevent leaks by keeping out dirt and moisture. Special Tire Inflation

if they’re

If you have 16 inch tires on your vehicle, and: - You’ll be driving for very long at speeds mph (120 km/h) where legal, inflate tires the recommended cold inflation pressure,

of 66 mph (105 km/h) to 75 10 psi (70 kPa) more than

- You’ll be driving for

very long at speeds of 76 mph

(120 kmih) to 85

mph (135 km/h) where legal, cold inflation pressure should be increased by 10 psi (70 kPa) and you must also reduce axle load capacity by 10%. Do not drive over 85 mph (135 kmlh) even if it’s legal.

- Inflation pressures should never exceed

inflation specified for the maximum 6-50

10 psi (70 kPa) above the

load of the tire.

6-51

K2474

Service & Appearance Care

Tire lnspecfion and Rotation To make your tires mileages recommended Maintenance Services” in the Index.

last longer, have them inspected and rotated at the

in the Maintenance Schedule. See “Scheduled

FRT

FRT

K2655

Use this rotation pattern, If your vehicle has front tires with different load ratings or tread designs (such as all season vs. on/off road) than the rear tires, don’t rotate your tires front to rear, After the tires have been rotated, adjust the front and rear inflation pressure as shown on the CertificationRire label. Make certain that all wheel nuts are properly tightened. See “Wheel Nut Torque” 1 CAUTION

in the Index.

it is fastened, can

a time. The wheel could

Rust or dirt on a wheel, or on the parts to which make the wheel nuts become loose after come off and cause an accident. When you change any rust or dirt from places where the wheel attaches In an emergency, you can use be sure to use a scraper or wire brush later, all the rust or

dirt off. (See ‘Changing a Flat Tire” in the Index.)

a cloth or paper towel to

a wheel, remove to the vehicle. do this; but to get

if you need to,

&52

When It’s Time for New Tires

TREAD WEAR INDICATORS

K1656

to tell when it’s time for new tires

One way indicators, which will appear when your tires have only less of tread remaining. You need a new tire if:

is to check the treadwear

2/32 inch (1,6 mm) or

tire.

You can see the indicators at three places around the You can see cord or fabric showing through the tire’s rubber. The tread or sidewall is cracked, cut cord or fabric. The tire has a bump, bulge The tire has a puncture, cut, because of the size or location

of the damage,

or split. or other damage that can’t be repaired well

or snagged deep enough

to show

Buying New Tires To find out what kind and size of tires you need, label. The tires installed on your vehicle when it was new had a Tire Performance Criteria Specification (TPC Spec) number on each tire’s sidewall. When you get new tires, get ones with that same TPC Spec number. That way, your vehicle will continue to have tires that are designed endurance, handling, speed rating, traction, ride and other things during normal service on your vehicle. the TPC number will be followed by a

“MS” (for mud and snow).

If your tires have an all-season tread design,

to give proper

look at the Certificationnire

6-53

Service & Appearance Care

by

If you mix

to

TPC Spec number,

as your original tires.

to the system developed by the United

If you ever replace your tires with those not having a make sure they are the same size, load range, speed rating and construction type (bias, bias-belted or radial)

tires of different sizes or types (radial and bias-belted tires) the vehicle may not handle properly, and you could have a crash. Be sure to use the same size and type tires on all wheels.

I CAUTION A Mixing tires could cause you to lose control while driving. Uniform Tire Quarity Grading The following information relates States National Highway Traffic Safety Administration which grades tires treadwear, traction and temperature performance. (This applies only vehicles sold in the United States.) Treadwear The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government course. For example, a tire graded times as well on the government course as a tire graded performance of tires depends upon the actual conditions however, and may depart significantly from the norm due to variations driving habits, service practices and differences climate. Traction-A, B, C The traction grades, from highest the tire’s ability to stop on wet pavement conditions on specified government test surfaces tire marked C may have poor traction performance. Warning: The (straight-ahead) traction tests and does not include cornering (turning) traction. Temperature-A, B, C The temperature grades resistance to the generation of heat and tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material and reduce tire life, and excessive temperature can failure. The grade C corresponds to a level of performance which passenger car tires must meet under the Federal Motor Vehicle Safety

as measured under controlled of asphalt and concrete. A

its ability to dissipate heat when

this tire is based on braking

150 would wear one and a half

traction grade assigned to

in in road characteristics and

to lowesr are: A,

test (1 1/2) 100. The relative of their use,

are A (the highest), B, and C, representing the tire’s

of the tire to degenerate lead to sudden tire all

8, and C. They represent

6-54

of performance on

on General

or

is established for a tire that is

in combination, can cause heat buildup

of passenger car tires.

to these grades, all such tires meet General

test wheel than the minimum required by law.

Standard No. 109. Grades B and A represent higher levels the laboratory Warning: The temperature grade for this tire properly inflated and not overloaded. Excessive speed, underinflation, excessive loading, either separately or and possible tire failure. Those grades are molded on the sidewalls While the tires available as standard or optional equipment on General Motors vehicles may vary with respect Motors performance standards and have been approved for use Motors vehicles. All passenger type (P Metric) tires must conform to Federal safety requirements in addition to these grades. Wheel Alignment and Tire Balance The wheels on your vehicle were aligned and balanced carefully at the factory to give you the longest In most cases, you will not need However, if you notice unusual tire wear the other, the alignment may need