1996 Chevrolet Corvette Owners Manual

Lift the jack, wheel nut socket and wheel lock key out of the foam container. Your Corvette wheel lock key has a unique registration number. The registration number is printed on a card included in your lock nut package. Also on this card is lost key replacement information. This number is not recorded by GM or your dealer, so be sure not to lose

5-24

t

The tools you’ll be using include the jack (A), wheel wrench (B), wheel nut socket (C) and wheel lock key (Dl.

The spare tire is on a tire carrier tray under the rear end of your vehicle. See “Compact Spare Tire” later in this section for more information about the compact spare. To lower the tray, position yourself behind the vehicle facing the front and use the socket end of the wheel wrench to turn the latch bolt clockwise. Lower the tray about 1 inch (25.4 mm). Don’t loosen the latch bolt too much, or the tray could fall.

5-25

Put the hooked end of the wheel wrench into the slot in the tray. Insert the wheel wrench a little from the side so it isn’t over the latch bolt. Pull up on the wheel wrench to lift the tray.

While holding the tray up with the wheel wrench, pull the latch bolt rearward to release it from the tray. If it won’t come free, loosen it a little more. Carefully lower the tray using the wheel wrench and remove the spare tire.

5-26

Removing the Flat Tire and Installing the Spare Tire

1. Remove the plastic wheel nut caps using the socket end of the wheel wrench by turning the wrench in the direction shown. Store the caps somewhere until you have the flat tire repaired or replaced.

2. Each wheel will have one locknut. A special wheel

lock key (removal tool) and instructions are provided. Attach the wheel lock key to the wheel wrench. Remove the locking wheel nut by turning counterclockwise.

5-27

3. Attach the wheel nut socket to the wheel wrench and

loosen all the wheel nuts by turning the wrench in the direction shown. Don't remove them yet.

4. Attach the wheel wrench to the jack. Hold the wheel wrench handle so it forms a right angle with the jack, then turn it clockwise.

5-28

5. When you’ve turned the wrench almost as far as it will go, swing it around to the other side. Keep turning to raise the jack lift head a 3 inches (76.2 mm).

6. Position the jack under the vehicle. There are two

locator triangles (A) on the panels (B) near each wheel. Raise the lift head ( C ) until it fits firmly under the steel rocker flange (D) between the triangles nearest the flat tire. Stay away from the moldings or fender flanges to avoid damaging them.

5-29

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

NOTICE:

Raising your vehicle with the jack improperly positioned will damage the vehicle or may allow the vehicle to fall off the jack. Be sure to fit the jack lift head into the proper location before raising your vehicle.

7. Raise the vehicle by turning the wheel wrench clockwise. Raise the vehicle far enough off the ground so there is enough room for the spare tire to fit. Remove all the wheel nuts and take off the flat tire.

5-30

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

A CAUTION.

Never use oil or grease on studs or nuts. If you do, the nuts might come loose. Your wheel could fall off, causing a.serious accident.

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

9. Replace the wheel nuts with the rounded end of the

nuts toward the wheel. Tighten each nut by hand until the wheel is held against the hub.

5-31

I

11. Tighten the wheel nuts firmly in a criss-cross sequence as shown.

10. Lower the vehicle by turning the wheel wrench counterclockwise. Lower the jack completely.

Incorrect wheel nuts or improperly tightened wheel nuts can cause the wheel to become loose and even come off. This could lead to an accident. Be sure to use the correct wheel nuts. If you have to replace them, be sure to get new GM original equipment wheel nuts. Stop somewhere as soon as you can and have the nuts tightened with a torque wrench to 100 lb-ft (140 N-m).

NOTICE:

Improperly tightened wheel nuts can lead to brake pulsation and rotor damage. To avoid expensive brake repairs, evenly tighten the wheel nuts in the proper sequence and to the proper torque specification.

The LOWPLAT TIRE or SERVICE LTPWS light will stay on as long as you are using the compact spare tire. It should go out when the original tire is replaced. After you have the flat tire repaired or replaced, install the plastic nut caps and tighten 22 lb-in (2.5 N-m).

them to

Storing a mat -- Except Grand Sport Coupe Rear Tires or Spare Tire and Tools - A ,A CAUTION:

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

5-33

I 1

If your vehicle is equipped with a spare tire, the road tire is larger than the spare, so you must adjust the tray to its lower position. Lift and push the tire carrier tray towqrd the front of the vehicle. The tray will drop to its lower position. If you are returning the spare to its storage area, raise the tire carrier tray to its upper position.

Put the tire on the tray. For the flat road tire, lift the latch bolt, pull it toward the rear of the vehicle, and the bolt will drop down to the lower position. For the spare tire, push up the latch bolt and push it toward the front of the vehicle to raise it to the upper position.

5-34

Put the wheel wrench back in its place under the driver’s seat. Be sure to tighten the wingnuts. Put the jack, wheel nut socket and wheel lock key in the rear storage compartment behind the passenger’s seat. Make sure the parts are stored properly in the foam container. Position the jack in the container so that you can read the yellow CAUTION label from the driver’s seat. Replace the plastic tray and close the storage compartment.

I NOTICE:

Put the hooked end of the wheel wrench into the slot in the tray (A). Lift the tray using the wheel wrench (B) and insert the latch bolt into the notch in the tray (C). To raise the tray, use the socket end of the wheel wrench to turn the latch bolt counterclockwise. Turn the latch bolt until it is snug.

Your Corvette’s radio receiver box is in the rear storage compartment. To help avoid damage, carefully place the jack, socket and wheel lock key into the foam container in the compartment. Do not toss or ‘place the items against the radio receiver box or any wiring.

5-35

Storing a Flat Grand Sport Coupe Rear Tire and Tools

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

A Grand Sport Coupe rear tire will not fit in the tray, so you must put in on the floor of the rear area. Put the flat tire in the storage bag provided with the spare. Place the tire on the rear area floor. Use the luggage straps to hold the tire in place. Loosen the straps, then attach each end of the longer strap to the rear cargo hooks. Attach the other strap to the hook behind the console.

When the tire is stored in the rear cargo area, you can’t store a removable roof panel. It will not fit into the latches properly.

Raise the tire carrier tray to its upper position and tighten the latch bolt until it is snug.

I A CAUTION:

Do not place anything on top of the flat road tire when it is stored in the rear area. If you stop quickly, these things could fly forward into the passenger area and hurt someone. Secure any loose articles in the rear area.

Put the wheel wrench back in its place under the driver’s seat. Be sure to tighten the wingnuts.

5-37

Put the jack, wheel nut socket and wheel lock key in the rear storage compartment behind the passenger’s seat. Make sure the parts are stored properly in the foam container. Position the jack in the container so that you can read the yellow CAUTION label fromthe driver’s seat. Replace the plastic tray and close the storage compartment.

NOTICE:

Your Corvette’s radio receiver box is in the rear storage compartment. To help avoid damage, carefully place the jack, socket and wheel lock key into the foam container in the compartment. Do not toss or place the items against the radio receiver box or any wiring.

Compact Spare Tire (If So Equipped) Although the compact spare tire was fully inflated when your vehicle was new, it can lose air after a time. Check the’inflation pressure regularly. It should be 60 psi (420 Wa). After installing the compact spare on your vehicle, you should stop as soon as possible and make sure your spare tire is correctly inflated. The compact spare is made to perform well at posted speed limits for distances up to 3,000 miles (5 OOO km), so you can finish your trip and have your full-size tire repaired or replaced where you want. Of course, it’s best to replace your spare with a full-size tire as soon as you can. Your spare will last longer and be in good shape in case you need it again.

When the compact spare is installed, your vehicle’s handling capabilities will be reduced during severe maneuvers. If you drive too fast, you could lose control of your vehicle. You or others could be injured. Don’t drive over 55 mph (90 km/h) when the compact spare is installed.

5-38

NOTICE:

When the compact spare is installed, don’t take your vehicle through an automatic car wash with guide rails. The compact spare can get caught on the rails. That can damage the tire and wheel, and maybe other parts of your vehicle.

Don’t use your compact spare on other vehicles. And don’t mix your compact spare tire or wheel with other wheels or tires. They won’t fit. Keep your spare tire and its wheel together.

NOTICE:

Tire chains won’t fit your compact spare. Using them can damage your car and can damage the chains too. Don’t use tire chains on your compact spare.

If You’re Stuck: In Sand, Mud, Ice or Snow What you don’t want to do when your vehicle is stuck is to spin your wheels too fast. The method known as “rocking” can help you get out when you’re stuck, but you must use caution.

If you let your tires spin at high speed, they can explode, and you or others could be injured. And, the transmission or other parts of the vehicle can overheat. That could cause an engine compartment fire or other damage. When you’re stuck, spin the wheels as little as possible. Don’t spin the wheels above 35 mph (55 kmh) as shown on the speedometer.

5-39

I NOTICE:

Spinning your wheels can destroy parts of your vehicle as well as the tires. If you spin the wheels too fast while shifting your transmission back and forth, you can destroy your transmission.

For information about using tire chains on your vehicle, see “Tire Chains” in the Index.

Rocking Your Vehicle to Get it Out First, turn your steering wheel left and right. That will clear the area around your front wheels. You should turn your ASR system off. (See “ASR System” in the Index.) Then shift back and forth between REVERSE (R) and a forward gear (or with a manual transmission, between FIRST (1) or SECOND (2) and REVERSE (R)), spinning the wheels as little as possible. Release the accelerator pedal while you shift, and press lightly on the accelerator pedal when the transmission is in gear. If that doesn’t get you out after a few tries, you may need to be towed out. If you do need “Towing Your Vehicle” in the Index.

to be towed out, see

5-40

_I

e

Section 6 Service and Appearance Care

Here you will find information about the care of your Corvette. This section begins with service and fuel information, and then it shows how to check important fluid and lubricant levels. There is also technical information about your vehicle, and a part devoted to its appearance care. Service Your Corvette dealer knows your vehicle best and wants you to be happy with it. We hope you’ll go to your dealer for all your service needs. You’ll get genuine GM parts and GM-trained and supported service people.

We hope you’ll want to keep your GM vehicle all GM. Genuine GM parts have one of these marks:

Delco

6-1

Doing Your Own Service Work If you want to do some of your own service work, you’ll want to get the proper Corvette Service Manual. It tells you much more about how to service your Corvett,e than this manual can. To order the proper service manual, see “Service and Owner Publications’’ in the Index. Your vehicle has an air bag system. Before attempting to do your own service work, see “Servicing Your Air Bag-Equipped Corvette” in the Index. You should keep a record with all parts receipts and list the mileage and the date of any’iervice work you perform. See “Maintenance Record” in the Index.

You can be injured and your vehicle could be damaged if you try to do service work on a vehicle without knowing enough about it. Be sure you have sufficient knowledge, experience, and the proper replacement parts and tools before you attempt any vehicle maintenance task. Be sure to use the proper nuts, bolts and other fasteners. “English” and “metric” fasteners can be easily confused. If you use the wrong fasteners, parts can later break or fall off. You could be hurt.

6-2

Fuel If you have the 5.7L Code 5 engine, use premium unleaded gasoline rated at 91 octane or higher. If you have the 5.7L Code P engine, use premium unleaded gasoline rated at 91 octane or higher for best performance. You may use middle grade or regular unleaded gasolines, but your vehicle may not accelerate as well. At a minimum, the gasoline you use should meet specifications ASTM D4814 in the United States and CGSB 3.5-M93 in Canada. Improved gasoline specifications have been developed by the American Automobile Manufacturers Association (AAMA) for better vehicle performance and engine protection. Gasolines meeting the AAMA specification could provide improved driveability and emission control system protection compared to other gasolines. Be sure the posted octane for premium is at least 91 (at least 89 for middle grade and 87 for regular). If the octane is less than 87, you may get a heavy knocking noise when you drive. If it’s bad enough, it can damage your engine.

If you’re using fuel rated at the recommended octane or higher and you still hear heavy knocking, your engine needs service. But don’t worry if you hear a little pinging noise when you’re accelerating or driving up a hill. That’s normal, and you don’t have to buy a higher octane fuel to get rid of pinging, It’s the heavy, constant knock that means you have a problem. If your vehicle is certified to meet California Emission Standards (indicated on the underhood tune-up label), it is designed to operate on fuels that meet California specifications. If such fuels are not available in states adopting California emissions standards, your vehicle will operate satisfactorily on fuels meeting federal specifications, but emission control system performance may be affected. The malfunction indicator lamp on your instrument panel may turn on and/or your vehicle may fail a smog-check test. If this occurs, return to your authorized Corvette dealer for diagnosis to determine the cause of failure. In the event it is determined that the cause of the condition is the type of fuels used, repairs may not be covered by your warranty.

6-3

In Canada, some gasolines contain an octane enhancing additive called MMT. If you use such fuels, your emission control system performance may deteriorate and the malfunction indicator lamp on your instrument panel may also turn on. If this happens, return to your authorized Corvette dealer for service. To pfovide cleaner air, all gasolines are now required to contain additives that will help prevent deposits from forming in your engine and fuel system, ailowing your emission control system to function properly. Therefore, you should not have to add anything to the fuel. In addition, gasolines containing oxygenates, such as ethers and ethanol, and reformulated gasolines may be available in your area to help clean the air. General Motors recommends that you use these gasolines if they comply with the specifications described earlier.

I NOTICE:

Fuels in Foreign Countries If you plan on driving in another country outside the United States or Canada, the proper fuel may be hard to find. Never use leaded gasoline or any other fuel not recommended in the previous text on fuel. Costly repairs caused by use of improper fuel wouldn’t be covered by your warranty. To check on fuel availability, ask an auto club, or contact a major oil company that does business in the country where you’ll be driving. You can also write us at the following address for advice. Just tell us where you’re going and give your Vehicle Identification Number (VIN).

General Motors Overseas Distribution Corporation, North American Export Sales (NAES) 1908 Colonel Sam Drive Oshawa, Ontario L1H 8P7

Your vehicle was not designed for fuel that contains methanol. Don’t use it. It can corrode metal parts in your fuel system and also damage plastic and rubber parts. That damage wouldn’t be covered under your warranty.

L A

Filling Your Tank

Gasoline vapor is highly flammable. It burns violently, and that can cause very bad injuries. Don’t smoke if you’re near gasoline or refueling your vehicle. Keep sparks, flames, and smoking materials away from gasoline.

The cap is under a hinged door on the rear decklid of your vehicle.

While refueling, place the cap in the indent to the left of the filler neck. To take off the cap, turn it slowly to the left (counterclockwise).

6-5

/rl CAUTION:

If you get gasoline on yourself and then something ignites it, you could be badly burned. Gasoline can spray out on you if you open the ,fuel filler cap too quickly. This spray can happen if your tank is nearly full, and is more likely in hot weather. Open the fuel filler cap slowly and wait for any “hiss” noise to stop. Then unscrew the cap all the way.

Be careful not to spill gasoline. Clean gasoline from painted surfaces as soon as possible. See “Cleaning the Outside of Your Corvette” in the Index.

When you put the cap back on, turn it to the right until you hear at least three clicks. Make sure you fully install the cap. The diagnostic system can determine if the fuel cap has been left off or improperly installed. This would allow fuel to evaporate into the atmosphere. See “Malfunction Indicator Lamp” in the Index.

NOTICE:

If you need a new cap, be sure to get the right type. Your dealer can get one for you. If you get the wrong type, it may not fit or have proper . venting, and your fuel tank and emissions system might be damaged.

6-6

sr

Checking Things Under the Hood Hood Release

To open the hood, first pull the handle inside the vehicle.

Then go to the side of the vehicle and pull up on the rear edge of the hood, near the windshield.

6-7

You’ll see the following when you open the hood with the LT1 engine: A. Hydraulic Clutch Fluid Reservoir (if equipped) B. Brake Fluid Reservoir C. Battery D. Electric Engine Fan E. Air Cleaner E Coolant Recovery Tank G. Power Steering Fluid Reservoir H. Engine Oil Fill Cap I. Engine Oil Dipstick J. Coolant High Fill Reservoir K. Automatic Transmission Dipstick (if equipped) L. Windshield Washer Fluid Reservoir

LT1 Engine Shown, LT4 Engine Similar

6-8

I

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

Things that burn can get on hot engine parts and start a fire. These include liquids like gasoline, oil, coolant, brake fluid, windshield washer and other fluids, and plastic or rubber. You or others could be burned. Be careful not to drop or spill things that will burn onto a hot engine.

Before closing the hood, be sure all the filler caps are on.

Then release the hood strut by moving it to the centered position and lowering the hood. Lower the hood until the bottom of the hood is the same height as the top of the windshield, then release it.

6-9

Engine Oil It’s a good idea to check your engine oil level every time you get fuel. In order to get an accurate reading, the oil must be warm and the vehicle must be on level ground.

Checking Engine Oil Pull out the dipstick and clean it with a paper towel or a cloth, then push it back in all the way. Remove it again, keeping the tip down.

The engine oil dipstick is next to the coolant high fill reservoir. The dipstick handle is a round, yellow loop.

Turn off the engine and give the oil a few minutes to drain back into the oil pan. If you don’t, the oil dipstick might not show the actual level.

6-10

When to Add Oil If the oil is at or below the ADD mark, you’ll need 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.

NOTICE:

Don’t add too much oil. If your engine has so much oil that the oil level gets above the upper mark that shows the proper operating range, your engine could be damaged.

The engine oil fill cap is on top of the engine block.

Just fill it enough to put the level somewhere in the proper operating range. Push the dipstick all the way back in when you’re through.

6-11

What Kind of Oil to Use Look for two things:

GM4718M The Corvette engine requires a special oil meeting GM Standard GM47 18M. Oils meeting this Standard may be identified as synthetic. However, not all synthetic oils will meet this GM Standard. You should look for and use only an oil that meets GM Standard GM47 1 8M.

NOTICE:

If you use oils that don’t have the GM4718M Standard designation, you can cause engine damage not covered by your warranty.

RECOMMENDED SAE VlSCOSlTT GRADE ENGIWE OILS

FOR BEST FUEL ECONOMY AND COW STARTING, SELECT M E LOWEST SAE VlSCOSlTT GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE.

~~~

I,

LOOK

FOR THIS SYMBOL

sw-30 SAE -1 PREFERRED

su

7 “C - +3a

HOT

WEATHER I “F

6100-

+ 80.

- + 27

+60.

- + 16

+40.

- + 4

+20-

- - 7

0 -

- - 18

cow WEATHER

6-12

DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED

@

synthetic oil, which meets all requirements

Your Corvette engine is filled at the factory with a Mobil 1 for your vehicle. Substitute Oil: When adding oil to maintain engine oil level, oil meeting GM Standard GM47 18M may not be available. You can add substitute oil designated SAE 5W-30 with the “Starburst” symbol at all temperatures. If temperatures are above 0” F (- 18 ” C), you may substitute SAE 1OW-30 with the “Starburst” symbol. Substitute oil not meeting GM Standard GM47 18M should not be used for an oil change. Engine Oil Additives Don’t add anything to your oil. Your Corvette dealer is ready to advise if you think something should be added.

SAE 5W-30 As shown in the viscosity chart, SAE 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. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 20W-50.

Oils meeting these requirements should also have the “Starburst” symbol on the container. This symbol indicates that the oil has been certified by the American Petroleum Institute (API). Do not use any oil which does not carry this Starburst symbol.

You should look for this on the oil container, and use only those oils that are identified as meeting GM Standard GM4718M and have the Starburst symbol on the front of the oil container.

6-13

. When to Change Engine Oil

If any one of these is true for you, use the short tripkity maintenance schedule:

Most trips are less than 5 to 10 miles (8 to 16 km). This is particularly important when outside temperatures are below freezing. Most trips include extensive idling (such as frequent driving in stop-and-go traffic). Most trips are through dusty areas.

Driving under these conditions causes engine oil to break down sooner. If any one of these is true for your vehicle, you need to change your oil and filter every 3,000 miles (5 OOO km) or 3 months -- whichever occurs first. If none of them is true, use the long triphighway maintenance schedule. Change the oil and filter every 7,500 miles (12 500 km) or 12 months -- whichever occurs first. Driving a vehicle with a fully warmed engine under highway conditions causes engine oil to break down slower. Your Corvette has an Oil Life Monitor. This featwe will let you know when to change your oil and filter -- usually between 3,000 miles (5 O00 krn) and 7,500 miles (12 500 km) since your last oil change. Under severe conditions, the indicator may come on before 3,000 miles 6-14

(5 000 km). Never drive your vehicle more than 7,500 miles (12 500 km) or 12 months (whichever occurs first) without an oil change. The system won’t detect dust in the oil. So, if you drive in a dusty area, be sure to change your oil every 3,000 miles (5 000 km) or sooner if the CHANGE OIL light comes on. Remember to reset the monitor when the oil has been changed. For more information, see “Engine Oil Life Monitor” in the Index. What to Do with Used Oil Did you know that used engine oil contains certain elements that may be unhealthy for your skin and could even cause cancer? Don’t 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 throw away 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 real threat to the environment. If you change your own oil, 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 by taking 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

.. n

A CAUTION:

Operating the engine with the air cleaner off can cause you or others to be burned. The air cleaner not only cleans the air, it stops flame backfires. If it isn't there, and the engine backfires, you could be burned. Don't drive with it off, and be careful working on the engine with the air cleaner off.

if the engine

NOTICE:

Refer to the Maintenance Schedule to determine when to replace the air filter. See "Scheduled Maintenance Services" in the Index.

If the air cleaner is off, a backfire can cause a damaging engine fire. And, dirt can easily get into your engine, which will damage it. Always have the air cleaner in place when you're driving.

6-15

Air Filter Replacement

To remove the air filter: 1. Unscrew the three knobs.

6-16

2. Disconnect the clamp from the manifold.

3. Pull the air cleaner straight up. 4. Open the air cleaner to remove the old filter and

install the new one.

5. Reverse the steps.

0 Align the tabs to the slots in the bottom of the

assembly before you replace it. Install the short knob into the middle hole first. Then install the longer knobs into the outer holes.

6-17

Automatic Transmission Fluid When to Check and Change A good time to check your automatic transmission fluid level is when the engine oil is changed. Change both the fluid and filter every 15,000 miles (25 000 km) if the vehicle is mainly driven under one or more of these conditions:

In heavy city traffic where the outside temperature regularly reaches 90 O F (32 O C) or higher. In hilly or mountainous terrain. Uses such as found in taxi, police or delivery service.

If you do not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles (166 000 km). 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 your Corvette dealership Service Department.

If you do it yourself, be sure to follow all the instructions here, or you could get a false reading on the dipstick.

I NOTICE:

Too much or too little fluid can damage your transmission. Too much can mean that some of the fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Be sure to get an accurate reading if you check your transmission fluid.

Wait at least 30 minutes before checking the transmission fluid level if you have been driving: 0 When outside temperatures are above 90°F (32°C). 0 At high speed for quite a while.

In heavy traffic -- especially in hot weather.

To get the right reading, the fluid should be at normal operating temperature, which is 180°F to 200°F (82°C to 93°C).

Checking lkansmission Fluid Hot Get the vehicle warmed up by driving about 15 miles (24 km) when outside temperatures are above 50°F (10°C). You may have to drive longer to bring the fluid to 180°F to 200°F (82°C to 93°C) in colder outside temperatures. See “Automatic Transmission Fluid Temperature Reading” in the Index.

Checking Transmission Fluid Cold A cold check is made after the vehicle has been sitting for eight hours or more with the engine off and is used only as a reference. Let the engine run at idle for five minutes if outside temperatures are 50°F (10°C) or more. If it’s colder than 50°F (lO”C), you may have to idle the engine longer. Should the fluid level be low during a cold.check, you must perform a hot check before adding fluid. This will give you a more accurate reading of the fluid level.

Checking the Fluid Hot or Cold 0 Park your vehicle on a level place. Keep the engine

running.

0 With the parking brake applied, place the shift lever

in PARK (P).

0 With your foot on the brake pedal, move the shift lever through each gear range, pausing for about three seconds in each range. Then, position the shift lever in, PARK (P) . Let the engine run at idle for three minutes or more.

6-19

Then, without shutting off the engine, follow these steps:

1. The automatic

transmission fluid dipstick is behind the engine oil dipstick, ne&- the windshield. The dipstick handle is a round, red loop. Pull out the dipstick and wipe it with a clean rag or paper towel.

2. Push it back in all the way, wait three seconds and

then pull it back out again.

6-20

3. Check both sides of the dipstick, and read the lower level. The fluid level should be in the area marked “80°F” for a cold check and will move into the “WARM” area as the temperature increases. When the fluid is at normal operating temperature (180°F to 200”F, 82°C to 93”C), the level must be in the crosshatched area marked “ 190°F.’’ See “Automatic Transmission Fluid Temperature Reading” in the Index.

4. If the fluid level is in the acceptable range, push the

dipstick back in all the way.

How to Add Fluid Refer to the Maintenance Schedule to determine what kind of transmission fluid to use. See “Recommended Fluids and Lubricants” in the Index. Add fluid only after checking the transmission fluid HOT. (A COLD check is used only as a reference.) If the fluid level is low, add only enough of the proper fluid to bring the level up to the HOT area for a hot check. It doesn’t take much fluid, generally less than a pint (0.5 L). Don’t overfill. We recommend you use only fluid labeled DEXRON@-111, because fluid with that label is made especially for your automatic transmission. Damage caused by fluid other than DEXRON-I11 is not covered by your new vehicle warranty. 0 After adding fluid, recheck the fluid level as

described under “How to Check.” When the correct fluid level is obtained, push the dipstick back in all the way.

Manual Transmission Fluid When to Check A good time to have it checked is when the engine oil is changed. However, the fluid in your manual transmission doesn’t require changing.

How to Check Because this operation can be difficult, you may choose to have this done at your Corvette dealership Service Department. If you do it yourself, be sure to follow all the instructions here, or you could get a false reading.

NOTICE:

Too much or too little fluid can damage your transmission. Too much can mean that some of the fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Be sure to get an accurate reading if you check your transmission fluid.

Check the fluid level only when your engine is off, the vehicle is parked on a level place and the transmission is cool enough for you to rest your fingers on the transmission case.

6-21

Then, follow these steps:

1. Remove the filler plug. 2. Check that the lubricant level is up to the bottom of

the filler plug hole.

3. If the fluid level is good, install the plug and be sure

it is fully seated. If the fluid level is low, add. more fluid as described in the next steps.

How to Add Fluid Here’s how to add fluid. Refer to the Maintenance Schedule to determine what kind of fluid to use. See “Recommended Fluids and Lubricants’’ in the Index. 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 the plug is fully seated. Hydraulic Clutch The clutch linkage in your vehicle is self-adjusting. The clutch master cylinder reservoir is filled with hydraulic clutch fluid. It isn’t a good idea to “top off’ your clutch fluid. Adding fluid won’t correct a leak. A fluid loss in this system could indicate a problem. Have the system inspected and repaired.

When to Check and What to Use

How To Check and Add Fluid The clutch master cylinder is under the Powertrain Control Module (PCM) in the left rear area of the engine compartment. To check the fluid, look at the area between the PCM and the battery. To add fluid, remove the PCM unit.

I 1

Refer to the Maintenance Schedule to determine how often you should check the fluid level in your clutch master cylinder reservoir and for the proper fluid. See “Owner Checks and Services” and “Recommended Fluids and Lubricants” in the Index.

You must loosen and remove the two screws before the PCM unit will lift out.

6-23

How to Check Lubricant

Fluid should be added if the fluid level is at or below the ADD mark on the reservoir. There are additional instructions on the reservoir cap. When returning the PCM to its proper position, make sure the unit is fully rearward in the bracket prior to installing the two screws. Rear Axle When to Check Lubricant Refer to the Maintenance Schedule to determine how often to check the lubricant. See “Periodic Maintenance Inspections” in the Index.

If the level is below the bottom of the filler plug hole, you’ll need to add some lubricant. Add enough lubricant to raise the level to the bottom of the filler plug hole.

6-24

What to Use To add lubricant when the level is low, use Axle Lubricant (GM Part No. 12345977) or S A E SOW-90 GL-5 gear lubricant. To completely refill after draining, add 4 ounces (1 18 ml) of Limited-Slip Differential Lubricant Additive (GM Part No. 1052358). Then fill to the bottom of the filler plug hole with Axle Lubricant (GM Part No. 12345977) or SAE SOW-90 GL-5 gear lubricant. Engine Coolant The cooling system in your vehicle is filled with new DEX-COOL (orange-colored, silicate-free) engine coolant. This coolant is designed to remain in your vehicle for 5 years or 100,000 miles (166 000 km), whichever occurs first. The following explains your cooling system and how to add coolant when it is low. If you have a problem with engine overheating or if you need to add coolant to your high fill reservoir, see “Engine Overheating” in the Index.

A 50/50 mixture of water and the proper coolant for your Corvette will: 0 Give freezing protection down to -34°F (-37°C). 0 Give boiling protection up to 265 O F ( 129 O C).

Protect against rust and corrosion. Help keep the proper engine temperature.

0 Let the warning lights and gauges work as they should.

NOTICE:

When adding coolant it is important that you use DEX-COOL (orange-colored, silicate-free) coolant meeting GM Specification 6277M. If silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine

coolant will require change sooner -- at

30,000 miles (50 000 km) or 24 months, whichever occurs first.

6-25

What to Use Use a mixture of one-half clean water (preferably distilled) and one-half DEX-COOL TM (orange-colored, silicate-free) antifreeze that meets GM Specification 6277M, which won’t damage aluminum parts. Use GM Engine Coolant Supplement (sealer) (GM Part No. 3634621) with any complete coolant change. If you use this mixture, you don’t need to add anything else.

Adding only plain water to your cooling system can be dangerous. Plain water, or some other liquid like alcohol, can boil before the proper coolant mix will. Your vehicle’s coolant warning system is set for the proper coolant mix. With plain water or the wrong mix, your 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 DEX-COOL TM (orange-colored. silicate-free) antifreeze.

NOTICE:

If you use an improper coolant mix, your engine could overheat and be badly damaged. The repair cost wouldn’t be covered by your warranty. Too much water in the mix can freeze and crack the engine, radiator, heater core and other parts.

If you have to add coolant more than four times a year, have your dealer check your cooling system.

NOTICE:

If you use the proper coolant, you don’t have to add extra inhibitors or additives which claim to improve the system. These can be harmful.

Checking Coolant

When your engine is cold, check the dipstick on the cap of the coolant recovery tank. The coolant level should be at COLD, or a little higher. When your engine is warm, the level on the dipstick should be up to HOT, or a little higher.

If this light comes on, it means you’re low on engine coolant.

LOW

COOLANT

Your Corvette also has a high fill reservoir located at the right rear of the engine compartment. If the recovery tank is very low or empty, also add coolant to the high fill reservoir. To add coolant at the high fill reservoir, see “Engine Overheating” in the Index.

6-27

Adding Coolant to the Recovery Tank If you need more coolant, add the proper mix at the coolant recovery tank, but only when your engine is cool. If the tank is very low or empty, also add coolant to the coolant high fill reservoir. See “Engine Overheating” in the Index for information.

.JTION:

Turning the coolant high fill reservoir pressure cap when the engine and radiator are hot can allow you badly. Never turn the pressure cap -- even a steam and scalding liquids to blow out and burn little -- when the engine and radiator are hot.

Add coolant mix at the recovery tank, but be careful not to spill it.

CAUTION:

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. Don’t spill coolant on a hot engine.

For complete drain, flush and refill of the engine, contact your Chevrolet dealer or the procedure may be found in a Chevrolet Corvette Service Manual. To purchase a service manual, see “Service and Owner Publications” in the Index.

6-28

Coolant High Fill Reservoir Cap

Power Steering Fluid

NOTICE:

Your coolant high fill reservoir cap (105 kPa) pressure-type cap and must be tightly installed to prevent coolant loss and possible engine damage from overheating. Be sure the arrows on the cap line up with the overflow tube.

is a 15 psi

Thermostat Engine coolant temperature is controlled by a thermostat in the engine coolant system. The thermostat stops the flow of coolant through the radiator until the coolant reaches a pre-set temperature.

When to Check Power Steering Fluid It is not necessary to regularly check power steering fluid unless you suspect there is a leak in the system or you hear an unusual noise. A fluid loss in this system could indicate a problem. Have the system inspected and repaired.

6-29

How To Check Power Steering Fluid When the engine compartment is cool, unscrew the cap and wipe the dipstick with a clean rag. Replace the cap and completely tighten it. Then remove the cap again and look at the fluid level on the dipstick. The level should be at the FULL COLD mark. If necessary, add only enough fluid to bring the level up to the mark.

When the engine compartment is hot the kvel should be at the HOT mark.

What to Use Refer to the Maintenance Schedule to determine what kind of fluid to use. See “Recommended Fluids and Lubricants” in the Index. Always use the proper fluid. Failure to use the proper fluid can cause leaks and damage hoses and seals. Windshield Washer Fluid What to Use When you need windshield washer fluid,.be sure to read the manufacturer’s instructions before use. If you will be operating your vehicle in an area where the temperature may fall below freezing, use a fluid that has sufficient protection against freezing.

[rfl When the engine

compartment is cool, the level should be at the FULL COLD mark.

Ai

g Washer Fluid

NOTICE:

Open the cap labeled WASHER FLUID ONLY. Add washer fluid until the tank is full.

0 When using concentrated washer fluid,

follow the manufacturer’s instructions for adding water. Don’t mix water with ready-to-use washer fluid. Water can cause the solution to freeze and damage your washer fluid tank and other parts of the washer system. Also, water doesn’t clean as well as washer fluid. Fill your washer fluid tank only three-quarters full when it’s very cold. This allows for expansion, which could damage the tank if it is completely full.

0 Don’t use radiator antifreeze in your

windshield washer. It can damage your washer system and paint.

6-31

Brakes Brake Fluid

Your brake master cylinder reservoir is here. It is filled with DOT-3 brake fluid. There are only two reasons why the brake fluid level in the reservoir might go down. The first is that the brake fluid goes down to an acceptable level during normal brake lining wear. When new linings are put in, the fluid level goes back up. The other reason is that fluid is leaking out of the brake 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.

6-32

So, it isn’t a good idea to “top off’ your brake fluid, Adding brake fluid won’t correct a leak. If you add fluid when your linings are worn, then you’ll have too much fluid when you get new brake linings. You should add (or remove) brake fluid, as necessary, only when work is

done on the brake hydraulic system. -- A CAUTION:

If you have too much brake fluid, it can spill the engine. The fluid will burn enough. You or others could be burned, and your vehicle could be damaged. Add brake fluid only when work is done on the brake hydraulic system.

if the engine is hot

on

Refer to the Maintenance Schedule to determine when to check your brake fluid. See “Periodic Maintenance Inspections” in the Index.

Checking Brake Fluid You can check the brake fluid without taking off the cap. Just look at the brake fluid reservoir. The fluid level should be above the MIN mark on the reservoir. If it isn’t, have your brake system checked to see if there is a leak. After work is done on the brake hydraulic system, make sure the level is between the MIN and MAX marks.

What to Add When you do need brake fluid, use only DOT-3 brake fluid -- such as Delco Supreme 11 No. 1052535). Use new brake fluid from a sealed container only, and always clean the brake fluid reservoir cap before removing it.

(GM Part

With the wrong kind of fluid in your brake system, your brakes may not work well, or they may not even work at all. This could cause a crash. Always use the proper brake fluid.

NOTICE:

0 Using the wrong fluid can badly damage

brake system parts. For example, just a few drops of mineral-based oil, such as engine oil, in your brake system can damage brake system parts so badly that they’ll have to be replaced. Don’t let someone put in the wrong kind of fluid. If you spill brake fluid on your vehicle’s painted surfaces, the paint finish can be damaged. Be careful not to spill brake fluid on your vehicle. If you do, wash it off immediately. See “Appearance Care” in the Index.

6-33

Brake Wear Your Corvette has four-wheel disc brakes. 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 may come and go or be heard all the time your vehicle is moving (except when you are pushing on the brake pedal firmly).

I A CAUTION:

The brake wear warning sound means that sooner or later your brakes won’t work well. That could lead to an accident. When you hear -.he brake wear warning sound, have your vehicle

I serviced*

NOTICE:

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

Some driving conditions or climates may cause a brake squeal when the brakes are first applied or lightly applied. This does not mean something is wrong with your brakes. Brake linings should always be replaced as complete axle sets. 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 of brake trouble. Brake Adjustment As you make brake stops, your disc brakes automatically adjust for wear.

6-34

Vehicle Storage If you’re not going to drive your vehicle for 25 days or more, take off the black, negative (-) cable from the battery. This will help keep your battery from running down.

Batteries have acid that can burn you and gas that can explode. You can be badly hurt if you aren’t careful. See “Jump Starting” in the Index for tips on working around a battery without getting hurt.

Contact your dealer to learn how to prepare your vehicle for longer storage periods.

Replacing Brake System Parts The braking system on a modern vehicle is complex. Its many parts have to be of top quality and work well together if the vehicle is to have really good braking. Vehicles we design and test have top-quality GM brake parts in them, as your Corvette does when it is new. When you replace parts of your braking system -- for example, when your brake linings wear down and you have to have new ones put in -- be sure you get new genuine GM replacement parts. If you don’t, your brakes may no longer work properly. For example, if someone puts in brake linings that are wrong for your vehicle, the 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 in the wrong replacement brake parts. Battery Every new Corvette has a Delco Freedom’ battery. You never have to add water to one of these. When it’s time for a new battery, we recommend a Delco Freedom battery. Get one that has the replacement number shown on the original battery’s label. For battery replacement, see your dealer or the Corvette Service Manual. To purchase a service manual, see “Service and Owner Publications” in the Index.

Bulb Replacement For the proper type of replacement bulb, see “Replacement Bulbs” in the Index. Halogen Bulbs

Headlamps

Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package.

1. 2.

3.

Open the hood. The headlamps need to be halfway open. Turn the headlamp switch on, then quickly back to the parking lamps setting. You may have to do this a few times to get the half-open position. You can also open the headlamps manually. See “Headlamp Doors” in the Index. Remove the two screws on each side of the headlamp.

6-36

4. Remove the two screws from both sides of the cover.

Before you remove the last screw, put your hand under the cover to hold it.

5. Reach around the hood and pull the cover straight

out. Be careful not to scratch the paint.

6. Remove the four screws from the retainer near each corner of the headlamp. Don’t move the large-head adjusting screws or your headlamp will not be aimed properly. Hold the headlamp and remove the retainer.

7. Remove the headlamp and unplug the electrical

connector.

8. Reverse the steps with a new headlamp.

6-37

Front Tbrn Signal Lamps

1. Open the hood. 2. Find the socket at the front of the engine

compartment.

3. Turn the socket counterclockwise one-quarter of a

turn and pull it out.

4. Push the bulb in, turn it counterclockwise, then pull

it out.

5. Reverse the steps with a new bulb. The socket has

three large tabs and one small tab. Be sure to line up the small tab with the small notch in the housing.

6-38

Sidemarker Lamps

2. Pull the bulb straight out. 3. Reverse the steps with a new bulb.

You can reach the front sidemarker lamp from inside the engine compartment. Reach the rear sidemarker lamp from under the vehicle. 1. Turn the socket counterclockwise one-quarter of a

turn and pull it out.

6-39

Cornering Lamps

You can reach the front cornering lamp from inside the engine compartment. Reach the rear cornering lamp from under the vehicle. 1. Press the tab on the socket, turn it counterclockwise

one-quarter of a turn and pull it out.

6-40

1_

2. Push the bulb in, turn it counterclockwise, theh pull it out. 3. Reverse the steps with a new bulb. Fog Lamps You can reach the fog lamps from under the front bumper. 1. Remove the screw in the access door. Open the door. 2. Turn the bulb base counterclockwise one-eighth of a

turn and pull it out.

3. Disconnect the bulb base from the wiring harness. 4. Reverse the steps with a new bulb.

Center High-Mounted Stoplamp

You can reach the center high-mounted stoplamp by removing the license plate and reaching through the opening. 1. Turn the socket counterclockwise one-quarter of a

turn and pull it out.

2. Push the bulb in, turn it counterclockwise, then pull

it out.

3. Reverse the steps with a new bulb.

6-41

Rear Turn Signal and Taillamps

1. Remove the screws.

6-42

2. Pull the lens out. 3. Push the bulb in, turn it counterclockwise, then pull

it out.

4. Reverse the steps with a new bulb. To prevent water from getting inside the lens, make sure the lens seal is properly positioned.

Back-up Lamps

You can reach the back-up lamps by removing the license plate and reaching through the opening. 1. Push the tab on the socket and turn it

counterclockwise.

2. Push the bulb in, turn it counterclockwise, then pull

it out.

3. Reverse the steps with a new bulb.

6-43

Rear Cargo Compartment Lamp -- Coupe

2. Remove the bulb. 3. Reverse the steps with a new bulb. Rear Cargo Compartment Lamp -- Convertible 1. Pry the cover off with a screwdriver. 2. Remove the bulb. 3. Reverse the steps with a new bulb.

1. Pry the cover off with a screwdriver. Be sure to pry

from the rear side, or you could break the tab on the cover.

6-44

Windshield Wiper Blade Replacement

It’s a good idea to clean or replace the wiper blade assembly every six months. For the proper windshield wiper blade length and type, see “Replacement Parts” in the Index. To remove the wiper blade assembly: 1.

Open the hood to gain access to the windshield wipers. Insert a screwdriver into the release slot (A) on the wiper arm. (There’s an arrow on the wiper arm pointing to the slot.) Push down gently to release the wiper blade assembly (B) from the arm. Reverse the steps to install the new assembly.

3.

2.

4.

6-45

Tires We don’t make tires. Your new Corvette comes with high-quality tires made by a leading tire manufacturer. If you ever have questions about your tire warranty and where to obtain service, see your Corvette Warranty booklet for details.

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” in the Index.

CAUTION: (Continued)

CAUTION: (Co

Underinflated tires pose the same danger as overloaded tires. The resulting accident could cause serious injury. Check all tires frequently to maintain the recommended pressure. Tire pressure should be checked when your tires are cold. Overinflated tires are more likely to be impact -- such as when you hit a pothole. cut, punctured or broken by a sudden Keep tires at the recommended pressure. Worn, old tires can cause accidents. If your tread is badly worn, or if your tires have been damaged, replace them.

See “1nfla.tion -- Tire Pressure” in this section for

the correct inflation pressure for competitive or high-speed driving.

Extended Mobility Tires (Option) If your Corvette has optional Goodyear Extended Mobility Tires (EMT’s), the tires will have “EMT” molded on the sidewalls. Your vehicle may also have a spare tire delete option. With the spare tire delete option, there’s no spare tire, no tire changing equipment and no place to store a tire in the vehicle. Extended Mobility Tires perform so well without any air that a Low Tire Pressure Warning System (LTPWS) is used to alert you if a tire has lost pressure. A LOWFLAT TIRE light will appear on your Driver Information Center if a tire’s inflation pressure is less than 25 psi (170 kPa). If the LOWFLAT TIRE light comes on, check your tire pressures as soon as you can. See “Low Tire Pressure Warning Light” in the Index for additional information.

is on,

When the LOWELAT TIRE warning light your vehicle’s handling capabilities will be reduced during severe maneuvers. If you drive too fast, you could lose control of your vehicle. You or others could be injured. Don’t drive over 55 mph (90 kmh) when the LOWLFLAT TIRE warning light is on. Drive cautiously, and check your tire pressures as soon as you can.

6-47

If a tire goes flat, you won’t need to stop on the side of the road to change the tire. You can just keep on driving. The shorter the distance you drive and the slower the speed, the greater the chance that the tire will not have to be replaced. If you drive on a deflated EMT for distances of 50 miles (80 km) or less and at speeds of 55 mph (90 km/h) or less, there is a good chance that the tire can be repaired. The tire can operate effectively with no air pressure for up to 200 miles (320 km) at speeds up to 55 mph (90 km/h), but the tire would then have to be replaced. Also remember: When a tire is filled with air, it provides a cushion between the road and the wheel. Because you do not have this cushion when driving on a deflated tire, try to avoid potholes that could damage your wheel and require replacement of it. Some road hazards can damage a tire beyond repair. This tire in a damage could occur before you’ve driven on the deflated condition. Whenever a tire has been damaged, or if you’ve driven any distance on a deflated EMT, check with a Goodyear EMT Service Center to determine whether the tire can be repaired or should be replaced. To maintain your vehicle’s extended mobility feature, all replacement tires must be Extended Mobility Tires. See the Goodyear Extended Mobility Tire Owner’s Manual and Limited Warranty supplied with your Corvette for additional information.

Inflation -- Tire Pressure The Tire-Loading Information label, which is on the rear edge of the driver’s door, shows the correct inflation pressures for your tires when they’re cold. “Cold” means your vehicle has been sitting for at least three hours or driven no more than 1 mile (1.6 km). For competitive driving or high-speed driving (over 150 mph or 240 km/h), make sure your tires are inflated to 35 psi (240 kPa). When you end this type of driving, reduce the cold inflation pressures (if necessary) to those listed on the Tire-Loading Information label.

I NOTICE:

Don’t let anyone tell you that underinflation or overinflation is all right. It’s not. If your tires don’t have enough air (underinflation), you can get the following: 0 Too much flexing

Too much heat

0 Tire overloading 0 Bad wear 0 Bad handling

Bad fuel economy.

NOTICE: (Continued)

(Continued)

I NOTICE: If your tires have too much air (overinflation), you can get the following:

Unusual wear Bad handling Rough ride Needless damage from road hazards.

Tire Rotation The tires on your Corvette are directional, asymmetrical and are different sizes front to rear. Due to this, your tires should not be rotated. Each tire and wheel should be used only in the position it is in.

When It’s Time for New Tires

When to Check Check your tires once a month or more. If you have a compact spare tire, it should be at 60 psi (420 Wa). How to Check Use a good quality pocket-type gage to check tire pressure. You can’t tell if your tires are properly inflated simply by looking at them. Radial tires may look properly inflated even when they’re underinflated. Be sure to put the valve caps back on the valve stems. They help prevent leaks by keeping out dirt and moisture.

One way to tell when it’s time for new tires is to check the treadwear indicators, which will appear when your tires have only 1/16 inch (1.6 mm) or less of tread remaining.

6-49

You need a new tire if any of the following statements are true:

You can see the indicators at three or more places around the tire. You can see cord or fabric showing through the tire’s rubber. The tread or sidewall is cracked, cut or snagged deep enough to show cord or fabric.

0 The tire has a bump, bulge or split.

The tire has a puncture, cut or other damage that can’t be repaired well because of the size or location of the damage.

Buying New Tires To find out what kind and size of tires you need, look at the Tire-Loading Information 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 to give proper endurance, handling, speed rating, traction, ride and other things during normal service on

your vehicle. If your tires have an all-season tread design, the TPC number will be followed by an “MS” (for mud and snow). If you ever replace your tires with those not having a TPC Spec number, make sure they are the same size, load range, speed rating and construction type (bias, bias-belted or radial) as your original tires.

A CAUTION:

Mixing tires could cause you to lose control while driving. If you mix tires of different sizes (other than those originally installed on your Corvette) or types (radial and bias-belted tires), the vehicle may not handle properly, and you could have a crash. Using tires of different sizes (other than those originally installed on your Corvette) may also cause damage to your vehicle. Be sure to use the correct size and type tires on all four wheels. It’s all right to drive with your compact spare (if you have one). It was developed for use on your vehicle.

6-50

Uniform Tire Quality Grading The following information relates to the system developed by the United States National Highway Traffic Safety Administration, which grades tires by treadwear, traction and temperature performance. (This applies only to vehicles sold in the United States.) The grades are molded on the sidewalls of most passenger car tires. The Uniform Tire Quality Grading system does not apply to deep tread, winter-type snow tires, space-saver or temporary use spare tires, tires with nominal rim diameters of 10 to 12 inches (25 to 30 cm), or to some limited-production tires. While the tires available on General Motors passenger cars and light trucks may vary with respect to these grades, they must also conform to Federal safety requirements and additional General Motors Tire Performance Criteria (TPC) standards.

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 test course. For example, a tire graded 150 would wear one and a half (1 1/2) times as well on the government course as a tire graded 100. The relative performance of tires depends

upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate.

Traction - A, B, C

The traction grades, from highest to lowest, are A, B, and C, and they represent the tire’s ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance. Warning: The traction grade assigned to this tire is based on braking (straightahead) traction tests and does not include cornering (turning) traction. Temperature - A, B, C The temperature grades are A (the highest), B, and C, representing the tire’s resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to ,sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109.

6-51

.

Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law. Warning: The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause heat buildup and possible tire failure. Wheel Alignment and Tire Balance The wheels on your vehicle were aligned and balanced carefully at the factory to give you the longest tire life and best overall performance. In most cases, you will not need to have your wheels aligned again. However, if you notice unusual tire wear or your vehicle pulling one way or the other, the alignment may need to be reset. If you notice your vehicle vibrating when driving on a smooth road, your wheels may need to be rebalanced.

Wheel Replacement Replace any wheel that is bent, cracked, or badly rusted or corroded. If wheel nuts keep coming loose, the wheel, wheel bolts and wheel nuts should be replaced. If the wheel leaks air, replace it (except some aluminum wheels, which can sometimes be repaired). See your Corvette dealer if any of these conditions exist. Your dealer will know the kind of wheel you need. ,Each new wheel should have the same load-carrying capacity, diameter, width, offset and be mounted the same way as the one it replaces. If you need to replace any of your wheels, wheel bolts or wheel nuts, replace them only with new GM original equipment parts. This way, you will be sure to have the right wheel, wheel bolts and wheel nuts for your Corvette model.

6-52

L Using the wrong replacement wheels, wheel bolts or wheel nuts on your vehicle can be dangerous. It could affect the braking and handling of your vehicle, make your tires lose air and make you lose control. You could have a collision in which you or others could be injured. Always use the correct wheel, wheel bolts and wheel nuts for replacement.

NOTICE:

The wrong wheel can also cause problems with bearing life, brake cooling, speedometer/odometer calibration, headlamp aim, bumper height, vehicle ground clearance and tire clearance to the body and chassis.

See “Changing a Flat Tire” in the Index for more information.

Used Replacement Wheels

Putting a used wheel on your vehicle is dangerous. You can’t know how it’s been used or how many miles it’s been driven. It could fail suddenly and cause an accident. If you have to replace a wheel, use a new GM original equipment wheel.

rire Chains

NOTICE:

Don’t use tire chains. They can damage your vehicle.

6-53

Appearance Care Remember, cleaning products can be hazardous. Some are toxic. Others can burst into flame if you strike a match or get them on a hot part of the vehicle. Some are dangerous if you breathe their fumes in a closed space. When you use anything from a container to clean your Corvette, be sure to follow the manufacturer’s warnings and instructions. And always open your doors or windows when you’re cleaning the inside. Never use these to clean your vehicle:

Gasoline Benzene Naphtha Carbon Tetrachloride Acetone Paint Thinner Turpentine Lacquer Thinner Nail Polish Remover

They can all be hazardous -- some more than others -- and they can all damage your vehicle, too.

Don’t use any of these unless this manual says you can. In many uses, these will damage your vehicle:

Alcohol

0 Laundry Soap 0 Bleach 0 Reducing Agents Cleaning the Inside of Your Corvette Use a vacuum cleaner often to get rid of dust and loose dirt. Wipe vinyl or leather with a clean, damp cloth. Your Corvette dealer has two GM cleaners, a solvent-type spot lifter and a foam-type powdered cleaner. They will clean normal spots and stains very well. Do not use them on vinyl or leather. Here are some cleaning tips: 0 Always read the instructions on the cleaner label. 0 Clean up stains as soon as you can -- before they set. Use a clean cloth or sponge, and change to a clean area often. A soft brush may be used if stains are stubborn.

0 Use solvent-type cleaners in a well-ventilated area

only. If you use them, don’t saturate the stained area.

6-54

If a ring forms after spot cleaning, clean the entire area immediately or it will set.

Fabric Protection Your Corvette has carpet that has been treated with Scotchgard" Fabric Protector, a 3M product. It protects fabrics by repelling oil and water, which are the carriers of most stains. Even with this protection, you still need to clean your carpet often to keep it looking new. Further information on cleaning is available by calling 1-800-433-3296 (in Minnesota, 1-800-642-6167). Cleaning Vinyl Use warm water and a clean cloth. 0 Rub with a clean, damp cloth to remove dirt. You

may have to do it more than once.

0 Things like tar, asphalt and shoe polish will stain if

you don't get them off quickly. Use a clean cloth and a GM Vinylkeather Cleaner or equivalent product.

Cleaning Coated Moldings These moldings are around the hatch opening in your Corvette's rear area. 0 When lightly soiled, wipe with a sponge or soft

lint-free cloth dampened with water.

0 When heavily soiled, use warm soapy water. You can remove scratches from a coated molding by wiping briskly with the solvent-type cleaner described earlier. If a ring forms, repeat the procedure over a larger area, wiping toward the center of the ring. If the ring still remains, wipe the whole molding. Cleaning Leather Use a soft cloth with lukewarm water and a mild soap or saddle soap.

For stubborn stains, use a GM Vinylkeather Cleaner or equivalent product. Never use oils, varnishes, solvent-based or abrasive cleaners, furniture polish or shoe polish on leather. 0 Soiled leather should be cleaned immediately. If dirt is allowed to work into the finish, it can harm the leather.

6-55

Cleaning the Top of the Instrument Panel Use only mild soap and water to clean the top surfaces of the instrument panel. Sprays containing silicones or waxes may cause annoying reflections in the windshield and even make it difficult to see through the windshield under certain conditions. Cleaning Soft-Touch Paint Surfaces Use only mild soap and water to clean the Soft-Touch paint surfaces in your Corvette. Cleaning Speaker Covers Vacuum around a speaker cover gently, so that the speaker won’t be damaged. Some spots and stains will clean off better with just water and mild soap. If something gets on one of them and you need to use a solvent, follow these steps:

Gently scrape excess soil from the trim material with a clean, dull knife or scraper. Use very little cleaner, light pressure and clean cloths (preferably cheesecloth). Cleaning should start at the outside of the stain, “feathering” toward the center. Keep changing to a clean section of the cloth. When you clean a stain from fabric, immediately dry the area with a blow dryer to help prevent a cleaning ring.

6-56

Care of Safety Belts Keep belts clean and dry.

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

Glass Glass should be cleaned often. GM Glass Cleaner (GM Part No. 1050427) or a liquid household glass cleaner will remove normal tobacco smoke and dust films. Don’t use abrasive cleaners on glass, because they may cause scratches. Avoid placing decals on the inside rear window, since they may have to be scraped off later. If abrasive cleaners are used on the inside of the rear window, an electric defogger element may be damaged. Any temporary license should not be attached across the defogger grid.

Cleaning the Outside of the Windshield and Wiper Blades If the windshield is not clear after using the windshield washer, or if the wiper blade chatters when running, wax or other material may be on the blade or windshield. Clean the outside of the windshield with GM Windshield Cleaner, Bon-Ami Powder@ (GM Part No. 1050011). The windshield is clean if beads do not form when you rinse it with water. If you use a glass treatment or conditioner containing ethyl alcohol or ethyl sulfate on your glass, be sure to remove the acrylic roof panel, if so equipped. These products may damage the panel. Clean the blade by wiping vigorously with a cloth soaked in full-strength windshield washer solvent. Then rinse the blade with water. Wiper blades should be checked on a regular basis and replaced when worn. Weatherstrips Silicone grease on weatherstrips will make them last longer, seal better, and not stick or squeak. Apply silicone grease with a clean cloth at least every six months. During very cold, damp weather more frequent

application may be required. (See “Recommended Fluids and Lubricants” in the Index.) Cleaning a Removable Roof Panel Special care is necessary when cleaning, removing and/or storing the roof panel.

Flush with water to remove dust and dirt, then dry the panel. Clean the panel with GM Glass Cleaner. Leave the cleaner on the panel for one minute, then wipe the panel with a soft, lint-free cloth. Don’t use abrasive cleaning materials.

If water drops are frequently allowed to dry on the roof panel, impurities in the water will adhere to the top. These impurities may destroy the finish. When the panel gets wet, you should dry it off.

I NOTICE:

Do not use a glass treatment or conditioner containing ethyl alcohol or ethyl sulfate on the roof panel. These products may damage the panel.

6-57

Cleaning the Outside of Your Corvette The paint finish on your vehicle providqs beauty, depth of color, gloss retention and durability. Washing Your Vehicle The best way to preserve your vehicle’s finish is to keep it clean by washing it often with lukewarm or cold water. Don’t wash your vehicle in the direct rays of the sun. Don’t use strong soaps or chemical detergents. Use liquid hand, dish or car washing (mild detergent) soaps. Don’t use cleaning agents that are petroleum based, or that contain acid or abrasives. All cleaning agents should be flushed promptly and not allowed to dry on the surface, or they could stain. Dry the finish with a soft, clean chamois or a 100% cotton towel to avoid surface scratches and water spotting.

High pressure car washes may cause water to enter your vehicle.

NOTICE:

Conveyor systems on some automatic car washes may damage a Corvette. They may not have enough clearance for the undercarriage or for the extra wide rear tires on Grand Sport Coupe models. Check with the manager before using a car wash, I Finish Care Occasional waxing or mild polishing of your Corvette by hand may be necessary to remove residue from the paint finish. You can get GM-approved cleaning products from your dealer. (See “Appearance Care and Materials” in the Index.)

Your Corvette has a “basecoat/clearcoat” paint finish. The clearcoat gives more depth and gloss to the colored basecoat. Always use waxes and polishes that are non-abrasive and made for a basecoatklearcoat paint finish.

I NOTICE:

Machine compounding or aggressive polishing on a basecoatklearcoat paint finish may dull the finish or leave swirl marks.

Foreign materials such as calcium chloride and other salts, ice melting agents, road oil and tar, tree sap, bird droppings, chemicals from industrial chimneys, etc. can damage your vehicle’s finish if they remain on painted surfaces. Wash the vehicle as soon as possible. If necessary, use non-abrasive cleaners that are marked safe for painted surfaces to remove foreign matter. Exterior painted surfaces are subject to aging, weather and chemical fallout that can take their toll over a period of years. You can help to keep the paint finish looking new by keeping your Corvette garaged or covered whenever possible.

Cleaning Your Convertible Top Your convertible top should be cleaned often. If you use an automatic car wash, use one with water jets and hanging cloths. When you hand wash the top, do it in partial shade. Use a mild soap, lukewarm water and a soft sponge. A chamois or cloth may leave lint on the top, and a brush can chafe the threads in the top fabric. Don’t use detergents, harsh cleaners, solvents or bleaching agents. When you clean the top, put one hand under it to support it. Wet the entire vehicle and wash the top evenly to avoid spots or rings. Let the soap remain on the fabric for a few minutes. When the top is really dirty, use a mild foam-type cleaner. Thoroughly rinse the entire vehicle, then let the top dry in direct sunlight. To protect the convertible top:

After you wash the vehicle, make sure the top is completely dry before you lower it. Don’t get any cleaner on the vehicle’s painted finish; it could leave streaks. If you decide to go through an automatic car wash, ask the manager if the equipment could damage your top.

Cleaning and Storage of Your Hardtop The optional hardtop has the same durable finish as the painted surfaces of your Corvette. You can wash, polish and wax it. If you store the hardtop for a long time, keep it covered in a dry place. Apply silicone grease to all the weatherstrips. Aluminum Wheels Your aluminum wheels have a protective coating similar to the painted surface of your vehicle. Don’t use strong soaps, chemicals, chrome polish, abrasive cleaners or abrasive cleaning brushes on them because you could damage this coating. After rinsing thoroughly, a wax may be applied.

NOTICE:

Don’t use an automatic car wash that has hard silicon carbide cleaning brushes. These brushes can take the protective coating off your aluminum wheels.

6-60

Tires To clean your tires, use a stiff brush with a tire cleaner.

NOTICE:

When applying a tire dressing always take care to wipe off any overspray or splash from all painted surfaces on the body or wheels of the vehicle. Petroleum-based products may damage the paint finish.

Finish Damage Any stone chips, fractures or deep scratches in the finish