2016 Chevrolet Corvette Owners Manual

For more information, see Doing Your Own Service Work 0 216.

Doing Your Own Service Work

{ Warning

It can be dangerous to work on your vehicle if you do not have the proper knowledge, service manual, tools, or parts. Always follow owner manual procedures and consult the service manual for your vehicle before doing any service work.

If doing some of your own service work, use the proper service manual. It tells you much more about how to service the vehicle than this manual can. To order the proper service manual, see Service Publications Ordering Information 0 324. This vehicle has an airbag system. Before attempting to do your own service work, see Servicing the Airbag-Equipped Vehicle 0 76.

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Keep a record with all parts receipts and list the mileage and the date of any service work performed. See Maintenance Records 0 310.

1. Pull the hood release lever

inside the vehicle. It is below the instrument panel on the driver side.

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Caution

Even small amounts of contamination can cause damage to vehicle systems. Do not allow contaminants to contact the fluids, reservoir caps, or dipsticks.

Hood To open the hood:

2. Go to the side of the vehicle

and pull up on the rear edge of the hood, near the windshield. Before closing the hood, be sure all the filler caps are on properly. Then, pull the hood down and close it firmly.

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Engine Compartment Overview

6.2L LT1 V8 Engine (without Dry Sump Engine Oil Tank)

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7. Engine Oil Dipstick. See

“Checking Engine Oil” under Engine Oil 0 223.

8. Brake Fluid Reservoir. See

Brake Fluid 0 240.

9. Clutch Master Cylinder

Reservoir (If Equipped). See Hydraulic Clutch 0 230.

10. Windshield Washer Fluid

Reservoir. See “Adding Washer Fluid” under Washer Fluid 0 238.

1. Passenger Compartment Air

Filter 0 156 (Out of View). See Passenger Compartment Air Filter 0 156.

2. Coolant Surge Tank and

Pressure Cap. See Engine Coolant 0 235.

3. Engine Compartment Fuse

Block 0 247.

4. Engine Air Cleaner/Filter 0 230. 5. Engine Cooling Fan (Out of View). See Cooling System (Engine) 0 232 or Cooling System (Aero Panel) 0 234.

6. Engine Oil Fill Cap. See “When

to Add Engine Oil” under Engine Oil 0 223.

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6.2L LT1 V8 Engine (with Z51 – Dry Sump Engine Oil Tank)

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1. Engine Oil Dipstick. See

“Checking Engine Oil” under Engine Oil 0 223.

2. Dry Sump Engine Oil Tank Fill

Cap. See “Changing Engine Oil and Filter” Engine Oil 0 223. 3. Passenger Compartment Air

Filter 0 156 (Out of View). See Passenger Compartment Air Filter 0 156.

4. Coolant Surge Tank and

Pressure Cap. See Engine Coolant 0 235.

5. Engine Compartment Fuse

Block 0 247.

6. Engine Air Cleaner/Filter 0 230. 7. Engine Cooling Fan (Out of View). See Cooling System (Engine) 0 232 or Cooling System (Aero Panel) 0 234. 8. Brake Fluid Reservoir. See

Brake Fluid 0 240.

9. Clutch Master Cylinder

Reservoir (If Equipped). See Hydraulic Clutch 0 230.

10. Windshield Washer Fluid

Reservoir. See “Adding Washer Fluid” under Washer Fluid 0 238.

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6.2L LT4 V8 Engine (with Z06 – Dry Sump Engine Oil Tank)

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1. Engine Oil Dipstick. See

“Checking Engine Oil” under Engine Oil 0 223.

2. Dry Sump Engine Oil Tank Fill

Cap. See “Changing Engine Oil and Filter” Engine Oil 0 223. 3. Passenger Compartment Air

Filter 0 156 (Out of View). See Passenger Compartment Air Filter 0 156.

4. Coolant Surge Tank and

Pressure Cap. See Engine Coolant 0 235.

5. Engine Compartment Fuse

Block 0 247.

6. Engine Air Cleaner/Filter 0 230. 7. Engine Cooling Fan (Out of View). See Cooling System (Engine) 0 232 or Cooling System (Aero Panel) 0 234. 8. Brake Fluid Reservoir. See

Brake Fluid 0 240.

9. Clutch Master Cylinder

Reservoir (If Equipped). See Hydraulic Clutch 0 230.

10. Windshield Washer Fluid

Reservoir. See “Adding Washer Fluid” under Washer Fluid 0 238.

Engine Oil To ensure proper engine performance and long life, careful attention must be paid to engine oil. Following these simple, but important steps will help protect your investment: . Use engine oil approved to the proper specification and of the proper viscosity grade. See “Selecting the Right Engine Oil” in this section.

. Check the engine oil level regularly and maintain the proper oil level. See “Checking Engine Oil” and “When to Add Engine Oil” in this section.

. Change the engine oil at the

appropriate time. See Engine Oil Life System 0 228.

. Always dispose of engine oil

properly. See “What to Do with Used Oil” in this section.

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Checking Engine Oil (Except Stingray with Z51 and Z06) If the ENGINE OIL LOW–ADD OIL message displays on the Driver Information Center (DIC), check the engine oil level right away. See Engine Oil Messages 0 123. Check the engine oil level regularly. It is a good idea to check the engine oil level at each fuel fill. In order to get an accurate reading, the vehicle must be on level ground. The engine oil dipstick handle is a loop. See Engine Compartment Overview 0 218 for the location of the engine oil dipstick. Obtaining an accurate oil level reading is essential: 1.

If the engine has been running recently, turn off the engine and check within five and 10 minutes of shutoff. Checking the oil level too soon after engine shutoff will not provide an accurate oil level reading.

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{ Warning

The engine oil dipstick handle may be hot; it could burn you. Use a towel or glove to touch the dipstick handle.

2. Pull the dipstick and wipe it with a clean paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level.

When to Add Engine Oil (Except Stingray with Z51 and Z06)

If the oil is below the cross-hatched area at the tip of the dipstick, add 1 L (1 qt) of the recommended oil and then recheck the level. See “Selecting the Right Engine Oil” in

this section for an explanation of what kind of oil to use. For engine oil crankcase capacity, see Capacities and Specifications 0 312. See Track Events and Competitive Driving 0 162 for additional information on engine oil.

Caution

Do not add too much oil. Oil levels above or below the acceptable operating range shown on the dipstick are harmful to the engine. If you find that you have an oil level above the operating range, i.e., the engine has so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, the engine could be damaged. You should drain out the excess oil or limit driving of the vehicle and seek a service professional to remove the excess amount of oil.

See Engine Compartment Overview 0 218 for the location of the engine oil fill cap. Add enough oil to put the level somewhere in the proper operating range. Push the dipstick all the way back in when through. Checking Engine Oil (Stingray with Z51 and Z06)

1. Engine Oil Dipstick 2. Engine Oil Fill Cap

It is a good idea to check the engine oil level at each fuel fill. In order to get an accurate reading, the vehicle must be on level ground.

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tank and there could be no engine oil at all showing on the dipstick. This is normal since the dipstick is designed to read the engine oil level only after the engine has run long enough to reach normal operating temperature. Do not add engine oil based on cold engine dipstick readings. The engine oil level on the dipstick will also be inaccurate if checked while the engine is running. 1. To obtain an accurate engine oil level reading, warm up the engine to at least 80 °C (175 °F). Cold oil will not give a correct oil level reading.

2. Once the engine is warm, turn off the engine. Checking the oil while the engine is running will result in an incorrect oil level reading.

3. Check the oil level between five and 10 minutes after the engine is shut down.

The engine oil dipstick handle is a loop. The dipstick is located on the dry sump engine oil tank. See Engine Compartment Overview 0 218 for the location of the dry sump engine oil tank. These vehicles have a racetrack-ready dry sump engine lubrication system. This high performance system operates differently than a standard engine lubrication system and requires a special procedure when checking the engine oil level. Follow this procedure closely. The engine oil level must be checked when the engine is warm. Cold oil level in the dry sump tank may not indicate the actual amount of oil in the system. With this system, engine oil is contained in an external tank, separate from the engine. Under normal operating conditions, the oil pan under the engine does not store any oil. If the vehicle has been parked for an extended period without the engine being started, some oil will seep back into the oil pan, reducing the amount of oil held in the dry sump

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{ Warning

The engine oil dipstick handle may be hot; it could burn you. Use a towel or glove to touch the dipstick handle.

4. Remove the dipstick from the

external engine oil tank and wipe it with a clean lint-free paper towel or a cloth. Re-insert the dipstick into the external oil tank, pushing it all the way in until it stops.

5. Remove the dipstick from the oil tank and read the level on the cross-hatched area.

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When to Add Engine Oil (Stingray with Z51 and Z06)

If the oil is below the cross-hatched area at the tip of the dipstick, add 1 L (1 qt) of the recommended oil through the oil fill cap opening in the oil tank and then recheck the level. See “Selecting the Right Engine Oil” for an explanation of what kind of oil to use. For engine oil crankcase capacity, see Capacities and Specifications 0 312. See Track Events and Competitive Driving 0 162 for additional information on engine oil.

Caution

Do not add too much oil. Oil levels above or below the acceptable operating range shown on the dipstick are harmful to the engine. If you find that you have an oil level above the operating range, i.e., the engine has so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, the engine could be damaged. You should drain out the excess oil or limit driving of the vehicle and seek a service professional to remove the excess amount of oil.

See Engine Compartment Overview 0 218 for the location of the external engine oil tank and fill cap. Add enough oil to put the level somewhere in the proper operating range. Push the dipstick all the way back into the oil tank when through.

Changing Engine Oil and Filter (Stingray with Z51 and Z06) The vehicle may have a racetrack-ready dry sump engine lubrication system. This high performance system operates differently than a standard engine lubrication system and requires a special procedure when changing the engine oil and filter. Follow this procedure closely when changing the engine oil and filter.

1. Engine Oil Drain Plugs 2. Seals

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7.

Install the oil fill cap and insert the dipstick, if removed.

8. Start the engine and let it run at idle for at least 15 seconds. This will circulate the fresh engine oil through the lubrication system.

9. Shut off the engine and check

the oil level as described under “Checking Engine Oil (Z51 and Z06).”

Selecting the Right Engine Oil Selecting the right engine oil depends on both the proper oil specification and viscosity grade. See Recommended Fluids and Lubricants 0 307.

Specification Ask for and use engine oils that meet the dexos1™ specification.

Steps to follow: 1. Remove the two engine oil

drain plugs from the bottom of the engine oil pan. One drain plug drains the external oil tank via the oil transfer supply line. The other drain plug drains residual oil from the crankcase sump. Allow the oil to drain.

2. Once the oil has been drained

from the engine, remove the engine oil filter and allow the oil to drain.

3. Reinstall both drain plugs and

tighten them to 25 Y (18 lb ft).

4. Replace the oil filter and

tighten it three-quarters to one turn after gasket contact. See Maintenance Replacement Parts 0 309 for the correct filter. 5. Oil is filled through the opening

in the top of the external engine oil tank. Remove the oil fill cap.

6. Add oil to the oil tank. See

Capacities and Specifications 0 312.

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Engine oils that have been approved by GM as meeting the dexos1 specification are marked with the dexos1 approved logo. See www.gmdexos.com. GM recommends Mobil 1® engine oils that show the dexos1 approved logo for its dry sump equipped engines.

Caution

Failure to use the recommended engine oil or equivalent can result in engine damage not covered by the vehicle warranty.

Viscosity Grade Use SAE 5W-30 viscosity grade engine oil. Cold Temperature Operation: In an area of extreme cold, where the temperature falls below −29 °C (−20 °F), an SAE 0W-30 oil may be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, it

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is recommended to select an oil of the correct specification. See “Specification” earlier in this section. For track events or competitive driving, use Mobil 1® 15W-50 engine oil. An instrument cluster warning light will be illuminated at high oil temperatures. See Driver Information Center (DIC) 0 113. Engine Oil Additives/Engine Oil Flushes Do not add anything to the oil. The recommended oils meeting the dexos1™ specification are all that is needed for good performance and engine protection. Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty. What to Do with Used Oil Used engine oil contains certain elements that can be unhealthy for your skin and could even cause cancer. Do not let used oil stay on your skin for very long. Clean your skin and nails with soap and water,

or a good hand cleaner. Wash or properly dispose of clothing or rags containing used engine oil. See the manufacturer's warnings about the use and disposal of oil products. Used oil can be a threat to the environment. If you change your own oil, be sure to drain all the oil from the filter before disposal. Never dispose of oil by putting it in the trash or pouring it on the ground, into sewers, or into streams or bodies of water. Recycle it by taking it to a place that collects used oil.

Engine Oil Life System

When to Change Engine Oil This vehicle has a computer that indicates when to change the engine oil and filter. This is based on a combination of factors which include engine revolutions, engine temperature, and miles driven. Based on driving conditions, the mileage at which an oil change is indicated can vary considerably. For the oil life system to work properly, the system must be reset every time the oil is changed.

Z51 and Z06 models have a racetrack-ready dry sump engine lubrication system. This high performance system operates differently than a standard engine lubrication system and requires a special procedure when changing the engine oil and filter. See Engine Oil 0 223. When the system has calculated that oil life has been diminished, it indicates that an oil change is necessary. A CHANGE ENGINE OIL SOON message comes on. Change the oil as soon as possible within the next 1 000 km (600 mi). It is possible that, if driving under the best conditions, the oil life system may not indicate that an oil change is necessary for up to a year. The engine oil and filter must be changed at least once a year and, at this time, the system must be reset. Your dealer has trained service people who will perform this work and reset the system. It is also important to check the oil regularly over the course of an oil drain interval and keep it at the proper level.

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If the system is ever reset accidentally, the oil must be changed at 5 000 km (3,000 mi) since the last oil change. Remember to reset the oil life system whenever the oil is changed.

Dry Sump Engine Break-In Oil Change If equipped with a dry sump engine, the initial oil and filter change must be performed at 800 km/500 mi. Follow the engine oil life system for every oil change thereafter. How to Reset the Engine Oil Life System Reset the system whenever the engine oil is changed so that the system can calculate the next engine oil change. To reset the system: 1. Scroll through the DIC Info

Pages menu until the REMAINING OIL LIFE percentage is displayed. See Driver Information Center (DIC) 0 113.

2. Press and hold the SEL button

on the DIC while the Oil Life display is active. The oil life will change to 100%.

If the CHANGE ENGINE OIL SOON message comes back on when the vehicle is started, the engine oil life system has not reset. Repeat the procedure.

Automatic Transmission Fluid

How to Check Automatic Transmission Fluid It is not necessary to check the transmission fluid level. A transmission fluid leak is the only reason for fluid loss. If a leak occurs, take the vehicle to the dealer and have it repaired as soon as possible. The vehicle is not equipped with a transmission fluid level dipstick. There is a special procedure for checking and changing the transmission fluid. Because this procedure is difficult, this should be done at the dealer. Contact the

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dealer for additional information or the procedure can be found in the service manual. To purchase a service manual, see Service Publications Ordering Information 0 324.

Caution

Use of the incorrect automatic transmission fluid may damage the vehicle, and the damage may not be covered by the vehicle warranty. Always use the automatic transmission fluid listed in Recommended Fluids and Lubricants 0 307.

Change the fluid and filter at the intervals listed in Maintenance Schedule 0 298, and be sure to use the fluid listed in Recommended Fluids and Lubricants 0 307.

Manual Transmission Fluid It is not necessary to check the manual transmission fluid level. A transmission fluid leak is the only

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reason for fluid loss. If a leak occurs, take the vehicle to the dealer and have it repaired as soon as possible. See Recommended Fluids and Lubricants 0 307 for the proper fluid to use.

Hydraulic Clutch It is not necessary to regularly check clutch fluid unless you suspect there is a leak in the system. Adding fluid will not correct a leak. A fluid loss in this system could indicate a problem. Have the system inspected and repaired. The fluid will darken over time. See Maintenance Schedule 0 298 for when to replace the fluid. When to Check and What to Use

The hydraulic clutch fluid reservoir cap has this symbol on it. See Engine Compartment Overview 0 218 for reservoir location. Refer to Recommended Fluids and Lubricants 0 307 for the proper fluid to use. The fluid requires changing. See Maintenance Schedule 0 298. How to Check and Add Fluid Visually check the clutch fluid reservoir to make sure the fluid level is at the MIN (minimum) line on the side of the reservoir. The hydraulic clutch fluid system should be closed and sealed. Do not remove the cap to check the fluid level or to top off the fluid level. Remove the cap only when necessary to add the proper fluid until the level reaches the MIN line.

Engine Air Cleaner/Filter See Engine Compartment Overview 0 218 for the location of the engine air cleaner/filter.

Caution

If water is sprayed and enters the engine air cleaner/filter intake and housing, the engine could be damaged. The repairs would not be covered by the vehicle warranty.

When to Inspect the Engine Air Cleaner/Filter For intervals on changing and inspecting the engine air cleaner/ filter, see Maintenance Schedule 0 298.

How to Inspect the Engine Air Cleaner/Filter Do not start the engine or have the engine running with the engine air cleaner/filter housing open. Before removing the engine air cleaner/ filter, make sure that the engine air cleaner/filter housing and nearby components are free of dirt and debris. Remove the engine air cleaner/filter. Lightly tap and shake the engine air cleaner/filter (away from the vehicle), to release loose

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dust and dirt. Inspect the engine air cleaner/filter for damage, and replace if damaged. Do not clean the engine air cleaner/filter or components with water or compressed air. To remove the hood extractor duct to gain access:

3. Reverse Step 2 to replace the

hood extractor duct.

To inspect or replace the engine air cleaner/filter:

1. Surge Tank Coolant Hose 2. Screws (2) 3. Hose Retainers (2) 4. Air Duct Clamp 5. Electrical Connector

1. Bolts (4) 2. Hood Extractor Duct

1. Open the hood. See

Hood 0 217.

2. Remove the four bolts (1) and

the hood extractor duct (2).

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Caution

If the engine coolant surge tank hose is not carefully lifted out of the hose retainers on the air cleaner/filter cover assembly, it may be damaged and cause engine coolant to leak. Damage would not be covered by the vehicle warranty.

1. Carefully lift the surge tank coolant hose (1) from both hose retainers (3) and position the hose to be able to remove the screws securing the air cleaner/filter endcap.

2. Loosen the air duct clamp (4) at the air cleaner/filter housing endcap and move the duct out of the way.

3. Remove the electrical

connector (5) from the sensor.

4. Remove the two screws (2).

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{ Warning

Operating the engine with the air cleaner/filter off can cause you or others to be burned. The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. Use caution when working on the engine and do not drive with the air cleaner/filter off.

Caution

If the air cleaner/filter is off, dirt can easily get into the engine, which could damage it. Always have the air cleaner/filter in place when you are driving.

Cooling System (Engine) The cooling system allows the engine to maintain the correct working temperature.

5. Turn the air cleaner/filter

endcap downward and disengage the lower endcap mounting tabs from the lower retention hinge features. Be sure to insert the lower endcap mounting tabs fully into the housing retention hinge features before turning the endcap upward and replacing the screws. Inspect or replace the air cleaner/filter.

6.

7. Reverse Steps 1–6 to replace

the air cleaner/filter endcap. 8. Replace the extractor hood

duct. See above.

LT1 Engine (without Dry Sump

Engine Oil Tank)

1. Coolant Surge Tank with

Pressure Cap

2. Engine Cooling Fan (Out

of View)

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{ Warning

Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them. If you do, you can be burned. Do not run the engine if there is a leak. If you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle.

Caution

Using coolant other than DEX-COOL® can cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner. Any repairs would not be covered by the vehicle warranty. Always use DEX-COOL (silicate-free) coolant in the vehicle.

LT1 Engine (with Dry Sump

LT4 Engine (with Dry Sump

Engine Oil Tank)

Engine Oil Tank)

1. Coolant Surge Tank with

1. Coolant Surge Tank with

Pressure Cap

Pressure Cap

2. Engine Cooling Fan (Out

2. Engine Cooling Fan (Out

of View)

of View)

{ Warning

An electric engine cooling fan under the hood can start up even when the engine is not running and can cause injury. Keep hands, clothing, and tools away from any underhood electric fan.

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Cooling System (Aero Panel) The aero panel enhances aerodynamic efficiency and improves fuel economy. Remove the aero panel and bracket to improve engine cooling and air conditioning performance when driving aggressively or in hot weather. To remove the aero panel and bracket:

Non-Z51 and Z51 Shown, Z06

Non-Z51 and Z51 Shown, Z06

Similar

Similar

1. Press up on the two indents at

the bottom and lift the aero panel off the bracket.

2. Unscrew the two fasteners that

secure the bracket.

3. Gently pull the bracket away

from the grille.

To replace the bracket and aero panel: 1. Position the bracket over the

grille.

2. Secure the bracket by pushing

the two fasteners into place.

3. Snap the aero panel into place.

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Engine Coolant The cooling system in the vehicle is filled with DEX-COOL® engine coolant. See Recommended Fluids and Lubricants 0 307. The fluid requires changing at certain intervals. See Maintenance Schedule 0 298. The following explains the cooling system and how to check and add coolant when it is low. If there is a problem with engine overheating, see Engine Overheating 0 237. What to Use

{ Warning

Adding only plain water or some other liquid to the cooling system can be dangerous. Plain water and other liquids, can boil before the proper coolant mixture will. The vehicle's coolant warning system is set for the proper coolant mixture. With plain water or the wrong mixture, the engine

Warning (Continued)

Caution

could get too hot but you would not get the overheat warning. The engine could catch fire and you or others could be burned. Use a mixture of 40% DEX-COOL coolant and 60% clean, drinkable water.

Use a mixture of 40% DEX-COOL coolant and 60% clean, drinkable water. If using this mixture, nothing else needs to be added. This mixture: . Gives freezing protection down

to −28 °C (−18 °F), outside temperature.

. Gives boiling protection up to

129 °C (265 °F), engine temperature.

. Protects against rust and

corrosion.

. Will not damage aluminum parts. . Helps keep the proper engine

If improper coolant mixture, inhibitors, or additives are used in the vehicle cooling system, the engine could overheat and be damaged. Too much water in the mixture can freeze and crack engine cooling parts. The repairs would not be covered by the vehicle warranty. Use only the proper mixture of engine coolant for the cooling system. See Recommended Fluids and Lubricants 0 307.

Never dispose of engine coolant by putting it in the trash, pouring it on the ground, or into sewers, streams, or bodies of water. Have the coolant changed by an authorized service center, familiar with legal requirements regarding used coolant disposal. This will help protect the environment and your health.

(Continued)

temperature.

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If ambient temperatures are anticipated below −28 °C (−18 °F), make sure a proper mixture ratio of 50% DEX-COOL coolant and 50% clean, drinkable water is used. Checking Coolant The vehicle must be on a level surface when checking the coolant level. Check to see if coolant is visible in the coolant surge tank. If the coolant inside the coolant surge tank is boiling, do not do anything else until it cools down. If coolant is visible but the coolant level is not at or above the cold fill line, add a mixture of 40% DEX-COOL coolant and 60% clean, drinkable water at the coolant recovery tank, but be sure the cooling system is cool before this is done. See Engine Overheating 0 237.

The engine coolant surge tank is toward the rear of the engine compartment on the passenger side of the vehicle. See Engine Compartment Overview 0 218. When the engine is cold, the coolant level should be at the cold fill line on the coolant surge tank. When the engine is hot, the level could be higher than the cold fill line. If the coolant is below the cold fill line when the engine is hot, there could be a leak in the cooling system. If the coolant is low, add the coolant or take the vehicle to your dealer for service. How to Add Coolant to the Coolant Surge Tank

{ Warning

You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol and it will burn if the engine parts are hot enough. Do not spill coolant on a hot engine.

{ Warning

Steam and scalding liquids from a hot cooling system can blow out and burn you badly. Never turn the cap when the cooling system, including the surge tank pressure cap, is hot. Wait for the cooling system and surge tank pressure cap to cool.

If coolant is needed, add the proper DEX-COOL coolant mixture directly to the surge tank, but be sure the cooling system is cool before this is done. 1. When the cooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot, remove the pressure cap. Turn the pressure cap slowly counterclockwise about one-quarter turn and then stop. If a hiss is heard, wait for that to stop. A hiss means there is still some pressure left.

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2. Keep turning the pressure cap

slowly, and remove it.

3. Fill the coolant surge tank with the proper DEX-COOL coolant mixture until the level inside stabilizes at the cold fill line on the front of the surge tank. 4. With the coolant surge tank

pressure cap off, start the engine and let it run until the upper radiator hose can be felt getting hot. Any time during this procedure, watch out for the engine cooling fan. By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower, add more of the proper mixture to the coolant surge tank until the level stabilizes at the cold fill line on the coolant surge tank.

5. Replace the pressure cap

tightly. Check the level in the surge tank when the system has cooled down. If the coolant is not at the proper level, repeat

Steps 1−4, then reinstall the pressure cap. If the coolant is not at the proper level when the system cools down again, see your dealer.

Caution

If the pressure cap is not tightly installed, coolant loss and possible engine damage may occur. Be sure the cap is properly and tightly secured.

Engine Overheating The vehicle has several indicators to warn of engine overheating. There is an engine coolant temperature gauge on the instrument cluster. See Engine Coolant Temperature Gauge 0 103. The vehicle may also display a message on the Driver Information Center (DIC). See Engine Cooling System Messages 0 123.

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If the decision is made not to lift the hood but to get service help right away, see Roadside Assistance Program 0 319. If the decision is made to lift the hood, make sure the vehicle is parked on a level surface. Then check to see if the engine cooling fan is running. If the engine is overheating, the fan should be running. If it is not, do not continue to run the engine and have the vehicle serviced.

Caution

Running the engine without coolant may cause damage or a fire. Vehicle damage would not be covered by the vehicle warranty.

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If Steam Is Coming from the Engine

{ Warning

Steam from an overheated engine can burn you badly, even if you just open the hood. Stay away from the engine if you see or hear steam coming from it. Just turn it off and get everyone away from the vehicle until it cools down. Wait until there is no sign of steam or coolant before you open the hood. If you keep driving when the engine is overheated, the liquids in it can catch fire. You or others could be badly burned. Stop the engine if it overheats, and get out of the vehicle until the engine is cool.

If No Steam Is Coming from the Engine If an engine overheat warning is displayed but no steam can be seen or heard, the problem may not be

too serious. Sometimes the engine can get a little too hot when the vehicle: . Climbs a long hill on a hot day. . Stops after high-speed driving. Idles for long periods in traffic.

If the overheat warning is displayed with no sign of steam: 1. Turn the air conditioning off. 2. Turn the heater on to the

highest temperature and to the highest fan speed. Open the windows as necessary.

3. When it is safe to do so, pull off

the road, shift to P (Park) or N (Neutral) and let the engine idle.

If the temperature overheat gauge is no longer in the shaded area or an overheat warning no longer displays, the vehicle can be driven. Continue to drive the vehicle slowly for about 10 minutes. Keep a safe vehicle distance from the vehicle in front. If the warning does not come

back on, continue to drive normally and have the cooling system checked for proper fill and function. If the warning continues, pull over, stop, and park the vehicle right away. If there is no sign of steam, idle the engine for three minutes while parked. If the warning is still displayed, turn off the engine until it cools down.

Washer Fluid

What to Use When the vehicle needs windshield washer fluid, be sure to read the manufacturer instructions before use. If the vehicle will be operating in an area where the temperature may fall below freezing, use a fluid that has sufficient protection against freezing.

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Adding Washer Fluid

Open the cap with the washer symbol on it. Add washer fluid until the tank is full. See Engine Compartment Overview 0 218.

Caution

. Do not use washer fluid that

contains any type of water repellent coating. This can cause the wiper blades to chatter or skip.

. Do not use engine coolant

(antifreeze) in the windshield washer. It can damage the windshield washer system and paint.

. Do not mix water with

ready-to-use washer fluid. Water can cause the

(Continued)

Caution (Continued)

solution to freeze and damage the washer fluid tank and other parts of the washer system.

. When using concentrated

washer fluid, follow the manufacturer instructions for adding water.

. Fill the washer fluid tank

only three-quarters full when it is very cold. This allows for fluid expansion if freezing occurs, which could damage the tank if it is completely full.

Brakes

Brake Wear Disc brake pads have built-in wear indicators that make a high-pitched warning sound when the brake pads are worn and new pads are needed. The sound can come and go or be

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239

heard all the time the vehicle is moving, except when applying the brake pedal firmly.

{ Warning

The brake wear warning sound means that soon the brakes will not work well. That could lead to a crash. When the brake wear warning sound is heard, have the vehicle serviced.

Caution

Continuing to drive with worn-out brake pads could result in costly brake repair.

Under certain weather or operating conditions, occasional brake squeal might be heard with the vehicle's performance braking system. This brake system is designed for superior fade resistance and consistent operation using high performance brake pads. Brake squeal is normal and does not affect system performance.

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Vehicle Care

If equipped with high performance brake linings, there could be an increased build-up of brake dust as well as minor noises as compared to standard brake linings. Brake linings should always be replaced as complete axle sets.

Brake Wear (Z06 Model with Z07
Package) This vehicle does not have built-in brake pad wear indicators. The brake pads should be inspected periodically and any time the tires are removed. See your dealer. Brake Pedal Travel See your dealer if the brake pedal does not return to normal height, or if there is a rapid increase in pedal travel. This could be a sign that brake service may be required. Replacing Brake System Parts Always replace brake system parts with new, approved replacement parts. If this is not done, the brakes may not work properly. The braking performance expected can change in many other ways if the wrong

replacement brake parts are installed or parts are improperly installed.

Brake Fluid

The brake master cylinder reservoir is filled with GM approved DOT 3
brake fluid as indicated on the reservoir cap. See Engine Compartment Overview 0 218 for the location of the reservoir.

Checking Brake Fluid With the vehicle in P (Park) on a level surface, the brake fluid level should be between the minimum and maximum marks on the brake fluid reservoir. There are only two reasons why the brake fluid level in the reservoir may go down:

. Normal brake lining wear. When

new linings are installed, the fluid level goes back up. . A fluid leak in the brake

hydraulic system. Have the brake hydraulic system fixed. With a leak, the brakes will not work well.

Always clean the brake fluid reservoir cap and the area around the cap before removing it. Do not top off the brake fluid. Adding fluid does not correct a leak. If fluid is added when the linings are worn, there will be too much fluid when new brake linings are installed. Add or remove fluid, as necessary, only when work is done on the brake hydraulic system.

{ Warning

If too much brake fluid is added, it can spill on the engine and burn, if the engine is hot enough. You or others could be burned, and the vehicle could be damaged.

(Continued)

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Warning (Continued)

Add brake fluid only when work is done on the brake hydraulic system.

When the brake fluid falls to a low level, the brake warning light comes on. See Brake System Warning Light 0 108. Brake fluid absorbs water over time which degrades the effectiveness of the brake fluid. Replace brake fluid at the specified intervals to prevent increased stopping distance. See Maintenance Schedule 0 298.

What to Add Use only GM approved DOT 3
brake fluid from a clean, sealed container. See Recommended Fluids and Lubricants 0 307.

{ Warning

The wrong or contaminated brake fluid could result in damage to the brake system. This could result in the loss of braking leading to a possible injury. Always use the proper GM approved brake fluid.

Caution

If brake fluid is spilled on the vehicle's painted surfaces, the paint finish can be damaged. Immediately wash off any painted surface.

Battery - North America The original equipment battery is maintenance free. Do not remove the cap and do not add fluid. Refer to the replacement number on the original battery label when a new battery is needed.

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For battery replacement, see your dealer or the service manual. To purchase a service manual, see Service Publications Ordering Information 0 324.

{ Warning WARNING: Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Batteries also contain other chemicals known to the State of California to cause cancer. WASH HANDS AFTER HANDLING. See California Proposition 65 Warning 0 213.

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Vehicle Storage

{ Warning

Batteries have acid that can burn you and gas that can explode. You can be badly hurt if you are not careful. See Jump Starting - North America 0 284 for tips on working around a battery without getting hurt.

Some vehicles have a battery maintainer package. Follow the instructions provided with the battery maintainer package to keep

the battery charged when the vehicle is not in use. Plug the battery maintainer into the rear accessory power outlet only. The front APO turns off after the ignition is off. For vehicles without a battery maintainer, see the following information: Infrequent Usage: Remove the black, negative (−) cable from the battery to keep the battery from running down. See “Window Indexing” under Power Windows 0 44. Extended Storage: It is recommended that the battery maintainer package be used. However, if not, remove the black, negative (−) cable from the battery. All vehicle memory settings will need to be reset when battery power is restored.

Rear Axle

When to Check Lubricant It is not necessary to regularly check rear axle fluid unless a leak is suspected or an unusual noise is heard. A fluid loss could indicate a problem. Have it inspected and repaired. How to Check Lubricant

To get an accurate reading, the vehicle should be on a level surface.

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The fluid level should be at or within 13 mm (0.5 in) of the bottom of the fill plug hole threads. If it is at this level, no additional fluid is needed. If the fluid level is below 13 mm (0.5 in), add fluid until it is above this level. What to Use To add lubricant when the level is low or to completely refill after draining, see Recommended Fluids and Lubricants 0 307. Then fill to within 13 mm (0.5 in) of the bottom of the fill plug hole threads with the required lubricant.

Starter Switch Check

{ Warning When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured.

1. Before starting this check, be

sure there is enough room around the vehicle.

2. Firmly apply both the parking brake and the regular brake. See Electric Parking Brake 0 190. Do not use the accelerator pedal, and be ready to turn off the engine immediately if it starts.

3. For automatic transmission

vehicles, try to start the engine in each gear. The vehicle should start only in P (Park) or N (Neutral). If the vehicle starts in any other position, contact your dealer for service. For manual transmission vehicles, put the shift lever in Neutral, push the clutch pedal down halfway, and try to start the engine. The vehicle should start only when the clutch pedal is pushed down all the way to the floor. If the vehicle starts when the clutch pedal is not pushed all the way down, contact your dealer for service.

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Automatic Transmission Shift Lock Control Function Check

{ Warning When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured.

1. Before starting this check, be

sure there is enough room around the vehicle. It should be parked on a level surface.

2. Apply the parking brake. See Electric Parking Brake 0 190. Be ready to apply the regular brake immediately if the vehicle begins to move.

3. With the engine off, turn the

ignition on, but do not start the engine. Without applying the regular brake, try to move the shift lever out of P (Park) with

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normal effort. If the shift lever moves out of P (Park), contact your dealer for service.

pressure from the regular brake pedal. Do this until the vehicle is held by the parking brake only.

. To check the P (Park)

mechanism's holding ability: With the engine running, shift to P (Park). Then release the parking brake followed by the regular brake.

Contact your dealer if service is required.

Wiper Blade Replacement Windshield wiper blades should be inspected for wear and cracking. Replacement blades come in different types and are removed in different ways. For proper type and length, see Maintenance Replacement Parts 0 309.

Park Brake and P (Park) Mechanism Check { Warning

When you are doing this check, the vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of the vehicle in case it begins to roll. Be ready to apply the regular brake at once should the vehicle begin to move.

Park on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the parking brake. . To check the parking brake's

holding ability: With the engine running and the transmission in N (Neutral), slowly remove foot

To replace the windshield wiper blade: 1. Open the hood. 2. Pull the windshield wiper assembly away from the windshield.

3. Lift up on the latch in the middle of the wiper blade where the wiper arm attaches.

4. With the latch open, pull the wiper blade down toward the windshield far enough to release it from the J-hooked end of the wiper arm.

5. Remove the wiper blade.

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Headlamp Aiming Headlamp aim has been preset and should need no further adjustment. If the vehicle is damaged in a crash, the headlamp aim may be affected. If adjustment to the headlamps is necessary, see your dealer.

Allowing the wiper blade arm to touch the windshield when no wiper blade is installed could damage the windshield. Any damage that occurs would not be covered by the vehicle warranty. Do not allow the wiper blade arm to touch the windshield.

6. Reverse Steps 1–3 for wiper

blade replacement.

Windshield Replacement The windshield is part of the HUD system. If the vehicle has to have the windshield replaced, get one that is designed for HUD or the HUD image may look out of focus.

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245

Bulb Replacement For the proper type of replacement bulbs, see Replacement Bulbs 0 246. For any bulb-changing procedure not listed in this section, contact your dealer.

High Intensity Discharge (HID) Lighting

{ Warning

The high intensity discharge lighting system operates at a very high voltage. If you try to service any of the system components, you could be seriously injured. Have your dealer or a qualified technician service them.

After an HID headlamp bulb has been replaced, the beam might be a slightly different shade than it was originally. This is normal.

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LED Lighting This vehicle has several LED lamps. For replacement of any LED lighting assembly, contact your dealer.

License Plate Lamp To replace one of these bulbs:

Replacement Bulbs

Exterior Lamp

License Plate Lamp

Bulb

Number W5W LL

For replacement bulbs not listed here, contact your dealer.

3. Turn the bulb socket (1)

counterclockwise to remove it from the lamp assembly (3).

4. Pull the bulb (2) straight out of

the bulb socket.

5. Push the replacement bulb straight into the bulb socket and turn the bulb socket clockwise to install it into the lamp assembly.

6. Push the lamp assembly back

into position until the release tab locks into place.

Passenger Side Shown, Driver

Side Similar

1. Push the lamp assembly

toward the right.

2. Pull the lamp assembly down

to remove.

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Electrical System

Electrical System Overload The vehicle has fuses to protect against an electrical system overload. Fuses also protect power devices in the vehicle. Replace a bad fuse with a new one of the identical size and rating. If there is a problem on the road and a fuse needs to be replaced, there are some spare fuses and a fuse puller in the Instrument Panel Fuse Block. The same amperage fuse can also be borrowed. Choose some feature of the vehicle that is not needed to use and replace it as soon as possible. Windshield Wipers If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart.

Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Always clear ice and heavy snow from the windshield before using the windshield wipers. If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.

Fuses The wiring circuits in the vehicle are protected from short circuits by fuses. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of the identical size and rating. Fuses of the same amperage can be temporarily borrowed from another fuse location, if a fuse goes out. Replace the fuse as soon as you can.

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Engine Compartment Fuse Block There is one fuse block in the engine compartment on the passenger side of the vehicle. See Engine Compartment Overview 0 218 for more information on location.

Caution

Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.

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The vehicle may not be equipped with all of the fuses, relays, and features shown.

Micro J-Case Fuses

Usage

Front Wiper Starter Antilock Brake System Valves Engine Control Module Electric Parking Brake

J-Case Fuses

Usage

Front Heater, Ventilation, and Air Conditioning Antilock Brake System Pump Logistics Vacuum Pump

J-Case Fuses

10

74

Usage

Electronic Rear Differential Module Transmission Cooling Fan 2

Micro

Fuses 2-pin

Usage

11
12

13
14
15

16

17

18

Heated Seat 1
Column Lock Module Steering Column Glove Box Engine Inside Position Body Control Module 6
Heater, Ventilation, and Air Conditioning Controls Body Control Module 5

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Micro

Fuses 2-pin

Usage

19
20

21

22
23
24
25

26

27
28
29

30
31

32
33

Heated Seat 2
Body Control Module 7
Electric Steering Column Lock Display Auxiliary Outlet Radio Instrument Cluster HUD Inside Rearview Mirror Odd Ignition Even Ignition Data Link Connector Seat Fan Fuel Pump Power Module Exhaust Valve 1
Horn

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Micro

Fuses 2-pin

Usage

Micro

Fuses 3-pin

Usage

Micro Relays

Usage

34
35

36

37

38
39
40
41

42
43
44

45

46

47

Headlamp Washer Air Conditioning Compressor Clutch Engine Outside Position Real Time Damping Intercooler Left Headlamp Right Headlpamp Headlamp Washer Pump Exhaust Valve 2
Reverse Lockout Electric Rear Differential Module Rear Transmission Cooler Fan Transmission Control Module Canister Vent

48

49

50

51
52

53

Integrated Chassis Control Module/ Automatic Occupant Sensing Theft/Vehicle Interface Module Engine/ Transmission Instrument Cluster Headlamp High Beam Transmission Control Module/ Engine Control Module

Micro Relays