2007 Chevrolet Corvette Owners Manual

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ice. On an otherwise clear road, ice patches may appear in shaded areas where the sun cannot reach, such as around clumps of trees, behind buildings, or under bridges. Sometimes the surface of a curve or an overpass may remain icy when the surrounding roads are clear. If you see a patch of ice ahead of you, brake before you are on it. Try not to brake while you are actually on the ice, and avoid sudden steering maneuvers. If You Are Caught in a Blizzard If you are stopped by heavy snow, you could be in a serious situation. You should probably stay with your vehicle unless you know for sure that you are near help and you can hike through the snow. Here are some things to do to summon help and keep yourself and your passengers safe: (cid:127) Turn on your hazard ﬂashers. (cid:127) Tie a red cloth to your vehicle to alert police that you have been stopped by the snow. (cid:127) Put on extra clothing or wrap a blanket around you. If you do not have blankets or extra clothing, make body insulators from newspapers, burlap bags, rags, ﬂoor mats — anything you can wrap around yourself or tuck under your clothing to keep warm. 304 You can run the engine to keep warm, but be careful. {CAUTION: Snow can trap exhaust gases under your vehicle. This can cause deadly CO (carbon monoxide) gas to get inside. CO could overcome you and kill you. You cannot see it or smell it, so you might not know it is in your vehicle. Clear away snow from around the base of your vehicle, especially any that is blocking your exhaust pipe. And check around again from time to time to be sure snow does not collect there. Open a window just a little on the side of the vehicle that is away from the wind. This will help keep CO out. Run your engine only as long as you must. This saves fuel. When you run the engine, make it go a little faster than just idle. That is, push the accelerator slightly. This uses less fuel for the heat that you get and it keeps the battery charged. 305 You will need a well-charged battery to restart the vehicle, and possibly for signaling later on with your headlamps. Let the heater run for a while. Then, shut the engine off and close the window almost all the way to preserve the heat. Start the engine again and repeat this only when you feel really uncomfortable from the cold. But do it as little as possible. Preserve the fuel as long as you can. To help keep warm, you can get out of the vehicle and do some fairly vigorous exercises every half hour or so until help comes. If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow In order to free your vehicle when it is stuck, you will need to spin the wheels, but you do not want to spin your wheels too fast. The method known as rocking can help you get out when you are stuck, but you must use caution. {CAUTION: If you let your vehicle’s 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 are stuck, spin the wheels as little as possible. Do not spin the wheels above 35 mph (55 km/h) as shown on the speedometer. Notice: Spinning the wheels can destroy parts of your vehicle as well as the tires. If you spin the wheels too fast while shifting the transmission back and forth, you can destroy the transmission. For information about using tire chains on your vehicle, see Tire Chains on page 401. 306 Rocking Your Vehicle to Get It Out First, turn the steering wheel left and right. That will clear the area around the front wheels. You should turn the traction control system off. See Traction Control System (TCS) on page 279. Then shift back and forth between REVERSE (R) and a forward gear, spinning the wheels as little as possible. For a manual transmission, shift slowly between either FIRST (1) or SECOND (2) and REVERSE (R), allowing the wheels to stop before shifting into gear. Release the accelerator pedal while you shift, and press lightly on the accelerator pedal when the transmission is in gear. By slowly spinning the wheels in the forward and reverse directions, you will cause a rocking motion that may free your vehicle. If that does not get your vehicle out after a few tries, it may need to be towed out. If your vehicle does need to be towed out, see Towing Your Vehicle on page 313. Loading Your Vehicle It is very important to know how much weight your vehicle can carry. This weight is called the vehicle capacity weight and includes the weight of all occupants, cargo and all nonfactory-installed options. Two labels on your vehicle show how much weight it may properly carry, the Tire and Loading Information label and the Certiﬁcation label. {CAUTION: Do not load your vehicle any heavier than the Gross Vehicle Weight Rating (GVWR), or either the maximum front or rear Gross Axle Weight Rating (GAWR). If you do, parts on your vehicle can break, and it can change the way your vehicle handles. These could cause you to lose control and crash. Also, overloading can shorten the life of your vehicle. 307 A vehicle speciﬁc Tire and Loading Information label is attached to the center pillar (B-pillar) of your vehicle. With the driver’s door open, you will ﬁnd the label attached below the door latch. This label shows the number of occupant seating positions (A), and the maximum vehicle capacity weight (B) in kilograms and pounds. The Tire and Loading Information label also shows the size of the original equipment tires (C) and the recommended cold tire inﬂation pressures (D). For more information on tires and inﬂation see Tires on page 378 and Inﬂation - Tire Pressure on page 386. There is also important loading information on the vehicle Certiﬁcation label. It tells you the Gross Vehicle Weight Rating (GVWR) and the Gross Axle Weight Rating (GAWR) for the front and rear axle. See “Certiﬁcation Label” later in this section. Tire and Loading Information Label Label Example 308 Steps for Determining Correct Load Limit 1. Locate the statement “The combined weight of occupants and cargo should never exceed XXX kg or XXX lbs” on your vehicle’s placard. 2. Determine the combined weight of the driver and passengers that will be riding in your vehicle. 3. Subtract the combined weight of the driver and passengers from XXX kg or XXX lbs. 4. The resulting ﬁgure equals the available amount of cargo and luggage load capacity. For example, if the “XXX” amount equals 1400 lbs and there will be ﬁve 150 lb passengers in your vehicle, the amount of available cargo and luggage load capacity is 650 lbs (1400 − 750 (5 x 150) = 650 lbs). 5. Determine the combined weight of luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo and luggage load capacity calculated in Step 4. 6. If your vehicle will be towing a trailer, the load from your trailer will be transferred to your vehicle. Consult this manual to determine how this reduces the available cargo and luggage load capacity of your vehicle. Your vehicle is neither designed nor intended to tow a trailer. 309 Example 1 Example 2 Item Description Total Item Description Total Vehicle Capacity Weight for Example 1 = Subtract Occupant Weight @ 150 lbs (68 kg) x 1 = Available Occupant and Cargo Weight = 400 lbs (181 kg) 150 lbs (68 kg) 250 lbs (113 kg) Vehicle Capacity Weight for Example 2 = Subtract Occupant Weight @ 150 lbs (68 kg) x 2 = Available Cargo Weight = 400 lbs (181 kg) 300 lbs (136 kg) 100 lbs (45 kg) 310 Certiﬁcation Label Example 3 Item Description Total Vehicle Capacity Weight for Example 3 = Subtract Occupant Weight @ 200 lbs (91 kg) x 2 = Available Cargo Weight = 400 lbs (181 kg) 400 lbs (181 kg) 0 lbs (0 kg) Refer to your vehicle’s tire and loading information label for speciﬁc information about your vehicle’s capacity weight and seating positions. The combined weight of the driver, passengers and cargo should never exceed your vehicle’s capacity weight. A vehicle speciﬁc Certiﬁcation label is attached to the rear edge of the driver’s door. It tells you the gross weight capacity of your vehicle, called the Gross Vehicle Weight Rating (GVWR). The GVWR includes the weight of the vehicle, all occupants, fuel and cargo. Never exceed the GVWR for your vehicle, or the Gross Axle Weight Rating (GAWR) for either the front or rear axle. 311 Do not load your vehicle with more weight than it was designed to carry. See “Steps for Determining Correct Load Limit” earlier in this section. {CAUTION: Do not load your vehicle any heavier than the Gross Vehicle Weight Rating (GVWR), or either the maximum front or rear Gross Axle Weight Rating (GAWR). If you do, parts on your vehicle can break, and it can change the way your vehicle handles. These could cause you to lose control and crash. Also, overloading can shorten the life of your vehicle. Notice: Overloading your vehicle may cause damage. Repairs would not be covered by your warranty. Do not overload your vehicle. 312 If you put things inside your vehicle — like suitcases, tools, packages or anything else — they will go as fast as the vehicle goes. If you have to stop or turn quickly, or if there is a crash, they will keep going. {CAUTION: Things you put inside your vehicle can strike and injure people in a sudden stop or turn, or in a crash. (cid:127) Put things in the rear area of your vehicle. Try to spread the weight evenly. (cid:127) Never stack heavier things, like suitcases, inside the vehicle so that some of them are above the tops of the seats. (cid:127) Do not leave an unsecured child restraint in your vehicle. (cid:127) When you carry something inside the vehicle, secure it whenever you can. Towing Towing Your Vehicle Consult your dealer or a professional towing service if you need to have your disabled vehicle towed. See Roadside Assistance Program on page 458. Recreational Vehicle Towing Recreational vehicle towing means towing your vehicle behind another vehicle — such as behind a motorhome. The two most common types of recreational vehicle towing are known as “dinghy towing”, towing your vehicle with all four wheels on the ground, and “dolly towing”, towing your vehicle with two wheels on the ground and two wheels up on a device known as a “dolly”. Your vehicle was not designed to be towed with any of its wheels on the ground. If your vehicle must be towed, see “Towing Your Vehicle” earlier in this section. Towing a Trailer Your Corvette is neither designed nor intended to tow a trailer. 313 ✍ NOTES 314 Section 5 Service and Appearance Care Service ........................................................ 318 Accessories and Modiﬁcations ................... 318 California Proposition 65 Warning .............. 319 Doing Your Own Service Work .................. 319 Adding Equipment to the Outside of Your Vehicle .......................................... 320 Fuel ............................................................. 320 Gasoline Octane ........................................ 320 Gasoline Speciﬁcations .............................. 321 California Fuel ........................................... 321 Additives ................................................... 322 Fuels in Foreign Countries ........................ 323 Filling the Tank ......................................... 323 Filling a Portable Fuel Container ............... 326 Checking Things Under the Hood .............. 326 Hood Release ........................................... 327 Engine Compartment Overview .................. 328 Engine Oil ................................................. 332 Engine Oil Life System .............................. 340 Engine Air Cleaner/Filter ............................ 342 Automatic Transmission Fluid .................... 345 Manual Transmission Fluid ........................ 346 Hydraulic Clutch ........................................ 346 Engine Coolant .......................................... 347 Coolant Surge Tank Pressure Cap ............ 350 Engine Overheating ................................... 350 Overheated Engine Protection Operating Mode ..................................... 352 Cooling System ......................................... 352 Power Steering Fluid ................................. 357 Windshield Washer Fluid ........................... 359 Brakes ...................................................... 360 Battery ...................................................... 363 Jump Starting ............................................ 364 Rear Axle .................................................... 370 Bulb Replacement ....................................... 370 High Intensity Discharge (HID) Lighting ..... 371 Halogen Bulbs ........................................... 371 Headlamps, Front Turn Signal, and Parking Lamps ....................................... 372 Taillamps, Turn Signal, and Stoplamps ...... 373 Replacement Bulbs ................................... 374 315 Section 5 Service and Appearance Care Windshield Replacement ............................ 374 Windshield Wiper Blade Replacement ....... 375 Tires ............................................................ 378 Winter Tires .............................................. 379 Tire Sidewall Labeling ............................... 380 Tire Terminology and Deﬁnitions ............... 382 Extended Mobility Tires ............................. 384 Inﬂation - Tire Pressure ............................. 386 High-Speed Operation ............................... 388 Tire Pressure Monitor System ................... 389 Tire Rotation ............................................. 392 When It Is Time for New Tires .................. 393 Buying New Tires ...................................... 393 Different Size Tires and Wheels ................ 395 Uniform Tire Quality Grading ..................... 396 Wheel Alignment and Tire Balance ............ 397 Wheel Replacement .................................. 398 Tire Chains ............................................... 401 Lifting Your Vehicle ................................... 402 If a Tire Goes Flat .................................... 406 Appearance Care ........................................ 407 Cleaning the Inside of Your Vehicle .......... 407 Fabric/Carpet ............................................. 409 Coated Moldings ....................................... 409 Leather ...................................................... 410 Instrument Panel, Vinyl, and Other Plastic Surfaces ................................................ 410 Cargo Cover and Convenience Net ........... 411 Care of Safety Belts .................................. 411 Weatherstrips ............................................ 411 Washing Your Vehicle ............................... 411 Cleaning Exterior Lamps/Lenses ................ 412 Finish Care ............................................... 412 Windshield and Wiper Blades .................... 413 Removable Roof Panel .............................. 414 Convertible Top ......................................... 414 Aluminum Wheels ...................................... 415 Tires ......................................................... 415 Finish Damage .......................................... 416 Underbody Maintenance ............................ 416 Fiberglass Springs (Composite Springs) ..... 416 Chemical Paint Spotting ............................ 416 Vehicle Care/Appearance Materials ............ 417 316 Section 5 Service and Appearance Care Vehicle Identiﬁcation .................................. 418 Vehicle Identiﬁcation Number (VIN) ........... 418 Service Parts Identiﬁcation Label ............... 418 Electrical System ........................................ 419 Add-On Electrical Equipment ..................... 419 Headlamp Wiring ....................................... 419 Windshield Wiper Fuses ............................ 419 Power Windows and Other Power Options .................................................. 420 Fuses and Circuit Breakers ....................... 420 Instrument Panel Fuse Block ..................... 420 Engine Compartment Fuse Block ............... 424 Capacities and Speciﬁcations .................... 427 317 Service Your dealer knows your vehicle best and wants you to be happy with it. We hope you will go to your dealer for all your service needs. You will get genuine GM parts and GM-trained and supported service people. We hope you will want to keep your GM vehicle all GM. Genuine GM parts have one of these marks: Accessories and Modiﬁcations When you add non-GM accessories to your vehicle they can affect your vehicle’s performance and safety, including such things as, airbags, braking, stability, ride and handling, emissions systems, aerodynamics, durability, and electronic systems like anti-lock brakes, traction control and stability control. Some of these accessories may even cause malfunction or damage not covered by warranty. GM Accessories are designed to complement and function with other systems on your vehicle. Your GM dealer can accessorize your vehicle using genuine GM Accessories. When you go to your GM dealer and ask for GM Accessories, you will know that GM-trained and supported service technicians will perform the work using genuine GM Accessories. 318 California Proposition 65 Warning Most motor vehicles, including this one, contain and/or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Engine exhaust, many parts and systems (including some inside the vehicle), many ﬂuids, and some component wear by-products contain and/or emit these chemicals. Doing Your Own Service Work {CAUTION: 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. (cid:127) Be sure you have sufficient knowledge, experience, the proper replacement parts, and tools before you attempt any vehicle maintenance task. CAUTION: (Continued) CAUTION: (Continued) (cid:127) 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. If you want to do some of your own service work, you will want to use the proper service manual. It tells you much more about how to service your vehicle than this manual can. To order the proper service manual, see Service Publications Ordering Information on page 471. Your vehicle has an airbag system. Before attempting to do your own service work, see Servicing Your Airbag-Equipped Vehicle on page 64. You should keep a record with all parts receipts and list the mileage and the date of any service work you perform. See Maintenance Record on page 447. 319 Adding Equipment to the Outside of Your Vehicle Things you might add to the outside of your vehicle can affect the airﬂow around it. This may cause wind noise and affect windshield washer performance. Check with your dealer before adding equipment to the outside of your vehicle. Fuel Use of the recommended fuel is an important part of the proper maintenance of your vehicle. To help keep your engine clean and maintain optimum vehicle performance, GM recommends the use of gasoline advertised as TOP TIER Detergent Gasoline. The 8th digit of your Vehicle Identiﬁcation Number (VIN) shows the code letter or number that identiﬁes your engine. You will ﬁnd the VIN at the top left of the instrument panel. See Vehicle Identiﬁcation Number (VIN) on page 418. Gasoline Octane If your vehicle has the 6.0L V8 engine (VIN Code U), use premium unleaded gasoline with a posted octane rating of 91 or higher. You may also use regular unleaded gasoline rated at 87 octane or higher, but your vehicle’s acceleration may be slightly reduced, and you may notice a slight audible knocking noise, commonly referred to as spark knock. If the octane is less than 87, you may notice a heavy knocking noise when you drive. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. Otherwise, you might damage your engine. If you are using gasoline rated at 87 octane or higher and you hear heavy knocking, your engine needs service. If your vehicle has the 7.0L V8 engine (VIN Code E), use premium unleaded gasoline with a posted octane rating of 91 or higher. For best performance, use premium unleaded gasoline with a posted octane rating of 93. 320 In an emergency, you can use regular unleaded gasoline with an octane rating of 87 or higher. If 87 octane fuel is used, do not perform any aggressive driving maneuvers such as wide open throttle applications. You may also hear audible spark knock during acceleration. Reﬁll your tank with premium fuel as soon as possible to avoid damaging your engine. If you are using gasoline rated at 91 octane or higher and you hear heavy knocking, your engine needs service. Gasoline Speciﬁcations At a minimum, gasoline should meet ASTM speciﬁcation D 4814 in the United States or CAN/CGSB-3.5 in Canada. Some gasolines may contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT). General Motors recommends against the use of gasolines containing MMT. See Additives on page 322 for additional information. California Fuel If your vehicle is certiﬁed to meet California Emissions Standards, it is designed to operate on fuels that meet California speciﬁcations. See the underhood emission control label. If this fuel is 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 may turn on and your vehicle may fail a smog-check test. See Malfunction Indicator Lamp on page 198. If this occurs, return to your authorized GM dealer for diagnosis. If it is determined that the condition is caused by the type of fuel used, repairs may not be covered by your warranty. 321 Additives To provide cleaner air, all gasolines in the United States are now required to contain additives that will help prevent engine and fuel system deposits from forming, allowing your emission control system to work properly. In most cases, you should not have to add anything to your fuel. However, some gasolines contain only the minimum amount of additive required to meet U.S. Environmental Protection Agency regulations. To help keep fuel injectors and intake valves clean, or if your vehicle experiences problems due to dirty injectors or valves, look for gasoline that is advertised as TOP TIER Detergent Gasoline. Also, your dealer has additives that will help correct and prevent most deposit-related problems. Gasolines containing oxygenates, such as ethers and ethanol, and reformulated gasolines may be available in your area. General Motors recommends that you use these gasolines if they comply with the speciﬁcations described earlier. However, E85 (85% ethanol) and other fuels containing more than 10% ethanol must not be used in vehicles that were not designed for those fuels. Notice: Your vehicle was not designed for fuel that contains methanol. Do not use fuel containing methanol. It can corrode metal parts in your fuel system and also damage the plastic and rubber parts. That damage would not be covered under your warranty. Some gasolines that are not reformulated for low emissions may contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT); ask the attendant where you buy gasoline whether the fuel contains MMT. General Motors recommends against the use of such gasolines. Fuels containing MMT can reduce the life of spark plugs and the performance of the emission control system may be affected. The malfunction indicator lamp may turn on. If this occurs, return to your dealer for service. 322 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 would not be covered by your warranty. To check the fuel availability, ask an auto club, or contact a major oil company that does business in the country where you will be driving. Filling the Tank {CAUTION: Fuel vapor burns violently and a fuel ﬁre can cause bad injuries. To help avoid injuries to you and others, read and follow all the instructions on the pump island. Turn off your engine when you are refueling. Do not smoke if you are near fuel or refueling your vehicle. CAUTION: (Continued) CAUTION: (Continued) Keep sparks, ﬂames, and smoking materials away from fuel. Do not leave the fuel pump unattended when refueling your vehicle. This is against the law in some places. Keep children away from the fuel pump; never let children pump fuel. The tethered fuel cap is located behind a hinged fuel door on the driver’s side of the vehicle. 323 The fuel door release button is located on the instrument panel to the left of the steering wheel. Push the button to release the fuel door. There is also a manual fuel door release tab. It is located against the upper trim in the rear compartment on the driver’s side of the vehicle. Pull the tab to release the fuel door. To remove the fuel cap, turn it slowly counterclockwise. The fuel cap has a spring in it; if the cap is released too soon, it will spring back to the right. While refueling, let the cap hang by the tether below the fuel ﬁll opening. 324 {CAUTION: If you spill fuel and then something ignites it, you could be badly burned. Fuel can spray out on you if you open the fuel cap too quickly. This spray can happen if your tank is nearly full, and is more likely in hot weather. Open the fuel cap slowly and wait for any hiss noise to stop. Then unscrew the cap all the way. Be careful not to spill fuel. Do not top off or overﬁll the tank and wait a few seconds after you have ﬁnished pumping before removing the nozzle. Clean fuel from painted surfaces as soon as possible. See Washing Your Vehicle on page 411. When replacing the fuel cap, turn it clockwise until it clicks. Make sure the cap is fully installed. 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 on page 198. The CHECK GAS CAP message will be displayed on the Driver Information Center (DIC) if the fuel cap is not properly installed. See DIC Warnings and Messages on page 212 for more information. {CAUTION: If a ﬁre starts while you are refueling, do not remove the nozzle. Shut off the ﬂow of fuel by shutting off the pump or by notifying the station attendant. Leave the area immediately. If you need a new fuel cap, be sure to Notice: get the right type. Your dealer can get one for you. If you get the wrong type, it may not ﬁt properly. This may cause your malfunction indicator lamp to light and may damage your fuel tank and emissions system. See Malfunction Indicator Lamp on page 198. 325 Filling a Portable Fuel Container {CAUTION: Never ﬁll a portable fuel container while it is in your vehicle. Static electricity discharge from the container can ignite the gasoline vapor. You can be badly burned and your vehicle damaged if this occurs. To help avoid injury to you and others: (cid:127) Dispense gasoline only into approved containers. (cid:127) Do not ﬁll a container while it is inside a vehicle, in a vehicle’s trunk, pickup bed, or on any surface other than the ground. (cid:127) Bring the ﬁll nozzle in contact with the inside of the ﬁll opening before operating the nozzle. Contact should be maintained until the ﬁlling is complete. (cid:127) Do not smoke while pumping gasoline. Checking Things Under the Hood {CAUTION: 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. {CAUTION: Things that burn can get on hot engine parts and start a ﬁre. These include liquids like fuel, 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. 326 Hood Release To open the hood, do the following: 1. Pull the hood release lever with this symbol on it. It is located inside the vehicle below the instrument panel on the driver’s side. 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, just pull the hood down and close it ﬁrmly. 327 Engine Compartment Overview If your vehicle has the 6.0L LS2 V8 engine and you are facing the front, when you open the hood, here is what you will see: 328 A. Clutch Master Cylinder Reservoir (If Equipped). See Hydraulic Clutch on page 346. G. Engine Oil Fill Cap. See “When to Add Engine Oil” under Engine Oil on page 332. B. Windshield Washer Fluid Reservoir. See “Adding Washer Fluid” under Windshield Washer Fluid on page 359. C. Brake Fluid Reservoir. See “Brake Fluid” under Brakes on page 360. D. Coolant Surge Tank and Pressure Cap. See Engine Coolant on page 347. E. Engine Air Cleaner/Filters. See Engine Air Cleaner/Filter on page 342. F. Power Steering Fluid Reservoir. See Power Steering Fluid on page 357. H. Engine Oil Dipstick. See “Checking Engine Oil” under Engine Oil on page 332. I. Engine Compartment Fuse Block. See Engine Compartment Fuse Block on page 424. J. Passenger Compartment Air Filter (Out of View). See Passenger Compartment Air Filter on page 184. K. Battery. See Battery on page 363. 329 If your vehicle has the 7.0L LS7 V8 engine and you are facing the driver’s side of the vehicle, when you open the hood, here is what you will see: 330 A. Engine Air Cleaner/Filter. See Engine Air Cleaner/Filter on page 342. B. Power Steering Fluid Reservoir. See Power Steering Fluid on page 357. C. Engine Compartment Fuse Block. See Engine Compartment Fuse Block on page 424. D. Remote Positive Terminal (Out of View). See Battery on page 363. E. Engine Oil Dipstick. See “Checking Engine Oil” under Engine Oil on page 332. F. Dry Sump Engine Oil Tank. See “Changing Engine Oil and Filter (Z06 Only)” Engine Oil on page 332. G. Engine Oil Fill Cap. See “When to Add Engine Oil” under Engine Oil on page 332. H. Coolant Surge Tank and Pressure Cap. See Engine Coolant on page 347. I. Windshield Washer Fluid Reservoir. See “Adding Washer Fluid” under Windshield Washer Fluid on page 359. J. Brake Fluid Reservoir. See “Brake Fluid” under Brakes on page 360. K. Clutch Master Cylinder Reservoir. See Hydraulic Clutch on page 346. 331 Engine Oil Checking Engine Oil (Except Z06) If the CHECK OIL LEVEL message on the Driver Information Center (DIC) comes on, it means you need to check the engine oil level right away. For more information, see Driver Information Center (DIC) on page 205. You should check the engine oil level regularly; this is an added reminder. It is a good idea to check the 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. The engine oil dipstick handle is a yellow loop. See Engine Compartment Overview on page 328 for the location of the engine oil dipstick. 1. Turn off the engine and give the oil a few minutes to drain back into the oil pan. If you do not do this, the oil dipstick might not show the actual level. 2. Pull out the dipstick and clean it with a lint-free paper towel or a cloth, then push it back in all the way. Remove it again, keeping the tip down. 332 Checking Engine Oil (Z06 Only) A. Engine Oil Dipstick B. Engine Oil Fill Cap It is a good idea to check the 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. The engine oil dipstick handle is a yellow loop. The dipstick is located on the dry sump engine oil tank. See Engine Compartment Overview on page 328 for the location of the dry sump engine oil tank. 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 checking the engine oil level. Follow this procedure closely when checking the engine oil level. 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 tank and there could be no engine oil at all showing on the dipstick. This is normal since the dipstick is designed to read 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 175°F (80°C). 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. Wait at least ﬁve minutes (but not more than 20 minutes) to allow oil to drain and settle in the engine. 4. Remove the dipstick from the external engine oil tank and clean it with a 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. Oil levels that fall in the cross-hatched area are normal. 333 When to Add Engine Oil (Except Z06) If the oil is below the cross-hatched area at the tip of the dipstick, you will need to add at least one quart/liter of oil. But you must use the right kind. This section explains what kind of oil to use. For engine oil crankcase capacity, see Capacities and Speciﬁcations on page 427. See Racing or Other Competitive Driving on page 290 for additional information on engine oil. Notice: Do not add too much oil. If 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. See Engine Compartment Overview on page 328 for the location of the engine oil ﬁll cap. Be sure to add enough oil to put the level somewhere in the proper operating range. Push the dipstick all the way back in when you are through. 334 When to Add Engine Oil (Z06 Only) If the oil is below the cross-hatched area at the tip of the dipstick, you will need to add at least one quart/liter of oil through the oil ﬁll cap opening in the oil tank. But you must use the right kind. This section explains what kind of oil to use. For engine oil crankcase capacity, see Capacities and Speciﬁcations on page 427. See Racing or Other Competitive Driving on page 290 for additional information on engine oil. Notice: Do not add too much oil. If 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. See Engine Compartment Overview on page 328 for the location of the external engine oil tank and ﬁll cap. Be sure to 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 you are through. 335 Changing Engine Oil and Filter (Z06 Only) 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. Follow this procedure closely when changing the engine oil and ﬁlter. A. Engine Oil Drain Plug B. Seal 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. 336 2. Once the oil has been drained from the engine, remove the engine oil ﬁlter and allow the oil to drain. 3. Re-install both drain plugs and tighten them to 18 lb ft (25 Y). 4. Replace the oil ﬁlter and tighten it to 18 lb ft (25 Y). See Normal Maintenance Replacement Parts on page 445 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 eight quarts (7.6 L) of oil to the oil tank. See Capacities and Speciﬁcations on page 427. 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 (Z06 Only).” 337 What Kind of Engine Oil to Use Look for two things: (cid:127) GM4718M Your vehicle’s engine requires a special oil meeting GM Standard GM4718M. 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 GM4718M. If you use oils that do not have the Notice: GM4718M Standard designation, you can cause engine damage not covered by your warranty. (cid:127) SAE 5W-30 As shown in the viscosity chart, SAE 5W-30 is best for your vehicle. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 20W-50. 338 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). 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. Your vehicle’s engine is ﬁlled at the factory with a Mobil 1® synthetic oil, which meets all requirements for your vehicle. Substitute Engine Oil: When adding oil to maintain engine oil level, oil meeting GM Standard GM4718M may not be available. You can add substitute oil designated SAE 5W-30 with the starburst symbol at all temperatures. Substitute oil not meeting GM Standard GM4718M should not be used for an oil change. Engine Oil Additives Do not add anything to the oil. The recommended oils with the starburst symbol that meet GM Standard GM4718M are all you will need for good performance and engine protection. 339 Engine Oil Life System When to Change Engine Oil Your vehicle has a computer that lets you know when to change your engine oil and ﬁlter. This is based on engine revolutions and engine temperature, and not on mileage. Based on driving conditions, the mileage at which an oil change will be indicated can vary considerably. For the oil life system to work properly, you must reset the system every time the oil is changed. Z06 models are equipped with 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 on page 332. When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. A CHANGE ENGINE OIL message will come on. Change your oil as soon as possible within the next 600 miles (1 000 km). It is possible that, if you are driving under the best conditions, the oil life system may not indicate that an oil change is necessary for over a year. However, your engine oil and ﬁlter must be changed at least once a year and at this time the system must be reset. Your dealer has GM-trained service people who will perform this work using genuine GM parts and reset the system. It is also important to check your oil regularly and keep it at the proper level. If the system is ever reset accidentally, you must change your oil at 3,000 miles (5 000 km) since your last oil change. Remember to reset the oil life system whenever the oil is changed. 340 How to Reset the Engine Oil Life System The Engine Oil Life System calculates when to change your engine oil and ﬁlter based on vehicle use. Anytime your oil is changed, reset the system so it can calculate when the next oil change is required. If a situation occurs where you change your oil prior to a CHANGE ENGINE OIL message being turned on, reset the system. To reset the CHANGE ENGINE OIL message after an oil change, do the following: 1. Press the TRIP button so the OIL LIFE percentage is displayed. 2. Press RESET and hold for two seconds. OIL LIFE REMAINING 100% will appear. If the CHANGE ENGINE OIL message comes back on when you start your vehicle, the engine oil life system has not reset. Repeat the procedure. What to Do with Used Oil Used engine oil contains certain elements that may 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, 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. 341 If you spray water into the engine air Engine Air Cleaner/Filter See Engine Compartment Overview on page 328 for the location of the engine air cleaner/ﬁlters. Notice: cleaner/ﬁlter intake and water enters the engine air cleaner/ﬁlter housing, you could damage your vehicle’s engine. The repairs would not be covered by your warranty. Do not spray water into the engine air cleaner/ﬁlter intake and/or housing. 342 If you are cleaning your vehicle with the hood open, take care not to spray water directly into either end of the air cleaner/ﬁlter housing, as shown in the illustration, as this could damage your vehicle’s engine. When to Inspect the Engine Air Cleaner/Filters Inspect the air cleaner/ﬁlters at the Maintenance II intervals and replace them at the ﬁrst oil change after each 50,000 mile (83 000 km) interval. See Scheduled Maintenance on page 433 for more information. If you are driving in dusty/dirty conditions, inspect the ﬁlters at each engine oil change. How to Inspect the Engine Air Cleaner/Filters (6.0L V8 Engine) To inspect the air cleaner/ﬁlters, remove the ﬁlters from the vehicle and lightly shake the ﬁlters to release loose dust and dirt. If the ﬁlters remain caked with dirt, new ﬁlters are required. To inspect or replace the engine air cleaner/ﬁlters, do the following: 1. Pull the latches on each side of the cover to open, then move the latches up and out of the way. 2. Push the air cleaner/ﬁlter cover toward the front of the vehicle and then pull it up and away. 343 3. Inspect or replace the ﬁlter. See Normal Maintenance Replacement Parts on page 445. 4. Reverse Steps 1 and 2 to replace the air cleaner/ﬁlter cover. 5. Repeat the procedure for the second air cleaner/ﬁlter. How to Inspect the Engine Air Cleaner/Filters (7.0L V8 Engine) To inspect the air cleaner/ﬁlters, remove the ﬁlters from the vehicle and lightly shake the ﬁlters to release loose dust and dirt. If the ﬁlters remain caked with dirt, new ﬁlters are required. 344 To inspect or replace the engine air cleaner/ﬁlters, do the following: 1. Remove the screws holding the ﬁlter element in place. 2. Pull on latches found on either side of the ﬁlter. 3. Inspect or replace the ﬁlter. See Normal Maintenance Replacement Parts on page 445. 4. Reverse Steps 1 and 2 to replace the air cleaner/ﬁlter cover. {CAUTION: 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. If it is not there and the engine backﬁres, you could be burned. Do not drive with it off, and be careful working on the engine with the air cleaner/ﬁlter off. If the air cleaner/ﬁlter is off, a backﬁre Notice: can cause a damaging engine ﬁre. And, dirt can easily get into your engine, which will damage it. Always have the air cleaner/ﬁlter in place when you are driving. 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 dealership service department and have it repaired as soon as possible. There is a special procedure for checking and changing the transmission ﬂuid. Because this procedure is difficult, you should have this done at the dealership service department. Contact your dealer for additional information or the procedure can be found in the service manual. To purchase a service manual, see Service Publications Ordering Information on page 471. Notice: Use of the incorrect automatic transmission ﬂuid may damage your vehicle, and the damages may not be covered by your warranty. Always use the automatic transmission ﬂuid listed in Recommended Fluids and Lubricants on page 443. 345 Change the ﬂuid and ﬁlter at the intervals listed in Additional Required Services on page 436, and be sure to use the ﬂuid listed in Recommended Fluids and Lubricants on page 443. Manual Transmission Fluid It is not necessary to check the manual transmission ﬂuid level. A transmission ﬂuid leak is the only reason for ﬂuid loss. If a leak occurs, take the vehicle to the dealership service department and have it repaired as soon as possible. See Recommended Fluids and Lubricants on page 443 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. When to Check and What to Use The hydraulic clutch ﬂuid reservoir cap has this symbol on it. See Engine Compartment Overview on page 328 for reservoir location. 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 to use. See Owner Checks and Services on page 439 and Recommended Fluids and Lubricants on page 443. 346 How to Check and Add Fluid Make sure the ﬂuid level is at the MIN (Minimum) line on the side of the reservoir. If it is not, remove the cap and add the proper ﬂuid until the level reaches the MIN line. Engine Coolant The cooling system in your vehicle is ﬁlled with DEX-COOL® engine coolant. This coolant is designed to remain in your vehicle for ﬁve years or 150,000 miles (240 000 km), whichever occurs ﬁrst, if you add only DEX-COOL® extended life coolant. The following explains your cooling system and how to add coolant when it is low. If you have a problem with engine overheating, see Engine Overheating on page 350. A 50/50 mixture of clean, drinkable water and DEX-COOL® coolant will: (cid:127) Give freezing protection down to −34°F (−37°C). (cid:127) Give boiling protection up to 265°F (129°C). (cid:127) Protect against rust and corrosion. (cid:127) Help keep the proper engine temperature. (cid:127) Let the warning lights and gages work as they should. Notice: Using coolant other than DEX-COOL® may cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant may require changing sooner, at the ﬁrst maintenance service after each 30,000 miles (50 000 km) or 24 months, whichever occurs ﬁrst. Any repairs would not be covered by your warranty. Always use DEX-COOL® (silicate-free) coolant in your vehicle. 347 If you use an improper coolant Notice: mixture, your engine could overheat and be badly damaged. The repair cost would not be covered by your warranty. Too much water in the mixture 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: additives in your vehicle’s cooling system, you could damage your vehicle. Use only the proper mixture of the engine coolant listed in this manual for the cooling system. See Recommended Fluids and Lubricants on page 443 for more information. If you use extra inhibitors and/or What to Use Use a mixture of one-half clean, drinkable water and one-half DEX-COOL® coolant which will not damage aluminum parts. If you use this coolant mixture, you do not need to add anything else. {CAUTION: Adding only plain water to your cooling system can be dangerous. Plain water, or some other liquid such as alcohol, can boil before the proper coolant mixture will. Your vehicle’s coolant warning system is set for the proper coolant mixture. With plain water or the wrong mixture, your engine could get too hot but you would not get the overheat warning. Your engine could catch ﬁre and you or others could be burned. Use a 50/50 mixture of clean, drinkable water and DEX-COOL® coolant. 348 Checking Coolant The engine coolant surge tank is located toward the rear of the engine compartment on the driver’s side of the vehicle. See Engine Compartment Overview on page 328 for more information on location. {CAUTION: Turning the surge tank pressure cap when the engine and radiator are hot can allow steam and scalding liquids to blow out and burn you badly. Never turn the surge tank pressure cap — even a little — when the engine and radiator are hot. The vehicle must be on a level surface. When your engine is cold, the coolant level should be at the FULL COLD mark. The FULL COLD mark is on the front of the coolant surge tank. Do not overﬁll the surge tank. Too much coolant can result in an overﬂow when the ﬂuid is hot. Adding Coolant If you need more coolant, add the proper DEX-COOL® coolant mixture at the surge tank, but only when the engine is cool. {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. Do not spill coolant on a hot engine. When replacing the pressure cap, make sure it is hand-tight and fully seated. 349 If the pressure cap is not tightly Coolant Surge Tank Pressure Cap Notice: installed, coolant loss and possible engine damage may occur. Be sure the cap is properly and tightly secured. The coolant surge tank pressure cap must be fully installed on the coolant surge tank. See Engine Compartment Overview on page 328 for more information on location. Engine Overheating You will ﬁnd an engine coolant temperature gage on the instrument panel cluster and a COOLANT OVER TEMPERATURE message on the Driver Information Center (DIC). See Engine Coolant Temperature Gage on page 197 and DIC Warnings and Messages on page 212 for more information. If Steam Is Coming From Your Engine {CAUTION: 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. 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 vehicles engine is overheated, the liquids in it can catch ﬁre. You or others could be badly burned. Stop your engine if it overheats, and get out of the vehicle until the engine is cool. See Overheated Engine Protection Operating Mode on page 352 for information on driving to a safe place in an emergency. 350 If your engine catches ﬁre because Notice: you keep driving with no coolant, your vehicle can be badly damaged. The costly repairs would not be covered by your warranty. See Overheated Engine Protection Operating Mode on page 352 for information on driving to a safe place in an emergency. If No Steam Is Coming From Your Engine If you get an engine overheat warning but see or hear no steam, the problem may not be too serious. Sometimes the engine can get a little too hot when you: (cid:127) Climb a long hill on a hot day. (cid:127) Stop after high-speed driving. (cid:127) Idle for long periods in traffic. If you get the overheat warning with no sign of steam, try this for a minute or so: 1. In heavy traffic, let the engine idle in NEUTRAL (N) while stopped. If it is safe to do so, pull off the road, shift to PARK (P) or NEUTRAL (N) and let the engine idle. 2. Turn on your heater to full hot at the highest fan speed and open the windows as necessary. If you no longer have the overheat warning, you can drive. Just to be safe, drive slower for about 10 minutes. If the warning does not come back on, you can drive normally. If the warning continues and you are not stopped, pull over, stop, and park your vehicle right away. If there is still no sign of steam, you can idle the engine for three minutes while you are parked. If you still have the warning, turn off the engine and get everyone out of the vehicle until it cools down. Also, see “Overheated Engine Protection Operating Mode” later in this section. You may decide not to lift the hood but to get service help right away. 351 Cooling System When you decide it is safe to lift the hood, here is what you will see: A. Electric Engine Cooling Fan B. Coolant Surge Tank with Pressure Cap Overheated Engine Protection Operating Mode If an overheated engine condition exists and the messages COOLANT OVER TEMPERATURE and REDUCED ENGINE POWER are displayed, along with the Check Engine light, an overheat protection mode which alternates ﬁring groups of cylinders helps prevent engine damage. In this mode, you will notice a loss in power and engine performance. This operating mode allows your vehicle to be driven to a safe place in an emergency; you may drive up to 50 miles (80 km). Notice: After driving in the overheated engine protection operating mode, to avoid engine damage, allow the engine to cool before attempting any repair. The engine oil will be severely degraded. Repair the cause of coolant loss, change the oil and reset the oil life system. See Engine Oil on page 332. 352 {CAUTION: {CAUTION: An electric engine cooling fan under the hood can start up even when the engine is not running and can injure you. Keep hands, clothing, and tools away from any underhood electric fan. If the coolant inside the coolant surge tank is boiling, do not do anything else until it cools down. The vehicle should be parked on a level surface. The coolant level should be at the FULL COLD mark on the front of the coolant surge tank. If it is not, you may have a leak at the pressure cap or in the radiator hoses, heater hoses, radiator, water pump or somewhere else in the cooling system. 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. If there seems to be no leak, with the engine on, check to see if the electric engine cooling fan is running. If the engine is overheating, the fan should be running. If it is not, your vehicle needs service. Notice: Engine damage from running your engine without coolant is not covered by your warranty. See Overheated Engine Protection Operating Mode on page 352 for information on driving to a safe place in an emergency. 353 Notice: Using coolant other than DEX-COOL® may cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner, at 30,000 miles (50 000 km) or 24 months, whichever occurs ﬁrst. Any repairs would not be covered by your warranty. Always use DEX-COOL® (silicate-free) coolant in your vehicle. How to Add Coolant to the Coolant Surge Tank If you have not found a problem yet, check to see if coolant is visible in the surge tank. If coolant is visible but the coolant level is not at the FULL COLD mark on the front of the coolant surge tank, add a 50/50 mixture of clean, drinkable water and DEX-COOL® coolant at the coolant surge tank, but be sure the cooling system, including the coolant surge tank pressure cap, is cool before you do it. See Engine Coolant on page 347 for more information. If no coolant is visible in the surge tank, add coolant as follows: {CAUTION: Steam and scalding liquids from a hot cooling system can blow out and burn you badly. They are under pressure, and if you turn the coolant surge tank pressure cap — even a little — they can come out at high speed. Never turn the cap when the cooling system, including the coolant surge tank pressure cap, is hot. Wait for the cooling system and coolant surge tank pressure cap to cool if you ever have to turn the pressure cap. 354 {CAUTION: Adding only plain water to your cooling system can be dangerous. Plain water, or some other liquid such as alcohol, can boil before the proper coolant mixture will. Your vehicle’s coolant warning system is set for the proper coolant mixture. With plain water or the wrong mixture, your engine could get too hot but you would not get the overheat warning. Your engine could catch ﬁre and you or others could be burned. Use a 50/50 mixture of clean, drinkable water and DEX-COOL® coolant. In cold weather, water can freeze and Notice: crack the engine, radiator, heater core and other parts. Use the recommended coolant and the proper coolant mixture. {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. Do not spill coolant on a hot engine. 355 2. Then keep turning the pressure cap slowly, and remove it. 1. You can remove the coolant surge tank pressure cap when the cooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot. Turn the pressure cap slowly counterclockwise about one-quarter turn and then stop. If you hear a hiss, wait for that to stop. A hiss means there is still some pressure left. 3. Fill the coolant surge tank with the proper mixture until the level inside stabilizes at the FULL COLD mark on the front of the surge tank. 356 5. Then replace the pressure cap. Be sure the pressure cap is hand-tight and fully seated. 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 through 4, then reinstall the pressure cap. If the coolant is not at the proper level when the system cools down again, see your dealer. Power Steering Fluid See Engine Compartment Overview on page 328 for reservoir location. 357 4. With the coolant surge tank pressure cap off, start the engine and let it run until you can feel the upper radiator hose getting hot. 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 FULL COLD mark on the coolant surge tank. 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. How to Check Power Steering Fluid To check the power steering ﬂuid, do the following: 1. Turn the ignition off and let the engine compartment cool down. 2. Wipe the cap and the top of the reservoir clean. 3. Unscrew the cap and wipe the dipstick with a clean rag. 4. Replace the cap and completely tighten it. 5. Remove the cap again and look at the ﬂuid level on the dipstick. There are markings on both sides of 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 level should be at the HOT mark. When the engine compartment is cool, the level should be at the FULL COLD mark. What to Use To determine what kind of ﬂuid to use, see Recommended Fluids and Lubricants on page 443. Always use the proper ﬂuid. Failure to use the proper ﬂuid can cause leaks and damage hoses and seals. 358 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. Adding Washer Fluid Open the cap with the washer symbol on it. Add washer ﬂuid until the tank is full. See Engine Compartment Overview on page 328 for reservoir location. Notice: (cid:127) When using concentrated washer ﬂuid, follow the manufacturer’s instructions for adding water. (cid:127) Do not 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 does not clean as well as washer ﬂuid. (cid:127) Fill your washer ﬂuid tank only three-quarters full when it is very cold. This allows for expansion if freezing occurs, which could damage the tank if it is completely full. (cid:127) Do not use engine coolant (antifreeze) in your windshield washer. It can damage your washer system and paint. 359 Brakes Brake Fluid Your brake master cylinder reservoir is ﬁlled with DOT-3 brake ﬂuid. See Engine Compartment Overview on page 328 for the location of the reservoir. 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 will not work well, or will not work at all. 360 So, it is not a good idea to top off your brake ﬂuid. Adding brake ﬂuid will not correct a leak. If you add ﬂuid when your linings are worn, then you will 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. {CAUTION: If you have too much brake ﬂuid, it can spill on the engine. The ﬂuid will burn if the engine is hot 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. See “Checking Brake Fluid” in this section. Refer to the Maintenance Schedule to determine when to check your brake ﬂuid. See Scheduled Maintenance on page 433. Checking Brake Fluid You can check the brake ﬂuid without taking off the cap. Look at the brake ﬂuid reservoir. The ﬂuid level should be above the MIN mark on the reservoir. If it is not, 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. Refer to Recommended Fluids and Lubricants on page 443. Use new brake ﬂuid from a sealed container only. Always clean the brake ﬂuid reservoir cap and the area around the cap before removing it. This will help keep dirt from entering the reservoir. {CAUTION: With the wrong kind of ﬂuid in the brake system, the 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: (cid:127) 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 the brake system can damage brake system parts so badly that they will have to be replaced. Do not 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 Washing Your Vehicle on page 411. (cid:127) 361 Brake Wear Your vehicle 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. {CAUTION: The brake wear warning sound means that soon the brakes will not work well. That could lead to an accident. When you hear the brake wear warning sound, have your vehicle 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. 362 Replacing Brake System Parts The braking system on a 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. Your vehicle was designed and tested with top-quality GM brake parts. When you replace parts of your braking system — for example, when your brake linings wear down and you need new ones put in — be sure you get new approved GM replacement parts. If you do not, 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 have come to expect can change in many other ways if someone puts in the wrong replacement brake parts. Battery Your vehicle has a maintenance free battery. When it is time for a new battery, get one that has the replacement number shown on the original battery’s label. We recommend an ACDelco® replacement battery. For battery replacement, see your dealer or the service manual. To purchase a service manual, see Service and Owner Publications in Service Publications Ordering Information on page 471. Warning: Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling. 363 Vehicle Storage If you are not going to drive your vehicle for 25 days or more, remove the black, negative (-) cable from the battery. This will help keep your battery from running down. {CAUTION: 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 on page 364 for tips on working around a battery without getting hurt. Jump Starting If your battery has run down, you may want to use another vehicle and some jumper cables to start your vehicle. Be sure to use the following steps to do it safely. 364 {CAUTION: Batteries can hurt you. They can be dangerous because: (cid:127) They contain acid that can burn you. (cid:127) They contain gas that can explode or (cid:127) They contain enough electricity to ignite. burn you. If you do not follow these steps exactly, some or all of these things can hurt you. If you try to start your vehicle by Notice: pushing or pulling it, you could damage your vehicle. Do not push or pull your vehicle to start it; instead, use the jump starting procedure in this manual to start your vehicle when the battery has run down. 1. Check the other vehicle. It must have a 12-volt battery with a negative ground system. If the other vehicle’s system is not a Notice: 12-volt system with a negative ground, both vehicles can be damaged. Only use vehicles with 12-volt systems with negative grounds to jump start your vehicle. 2. Get the vehicles close enough so the jumper cables can reach, but be sure the vehicles are not touching each other. If they are, it could cause a ground connection you do not want. You would not be able to start your vehicle, and the bad grounding could damage the electrical systems. To avoid the possibility of the vehicles rolling, set the parking brake ﬁrmly on both vehicles involved in the jump start procedure. Put an automatic transmission in PARK (P) or a manual transmission in NEUTRAL before setting the parking brakes. Notice: If you leave your radio or other accessories on during the jump starting procedure, they could be damaged. The repairs would not be covered by your warranty. Always turn off your radio and other accessories when jump starting your vehicle. 3. Turn off the ignition on both vehicles. Unplug unnecessary accessories plugged into the cigarette lighter or the accessory power outlet. Turn off the radio and all lamps that are not needed. This will avoid sparks and help save both batteries. And it could save the radio! 365 The remote negative (−) terminal (B) is located underneath the engine cover, below the engine oil ﬁll cap. See Engine Compartment Overview on page 328 for the location of the engine compartment fuse block and engine oil ﬁll cap. You will not need to access the battery for jump starting. The remote terminals are for that purpose. {CAUTION: An electric fan can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan. 4. Open the hoods and locate the positive (+) and negative (−) terminal locations on each vehicle. Your vehicle has a remote positive (+) terminal (A) and a remote negative (−) terminal (B), as shown in the illustration, which should be used to jump start your vehicle. The remote positive (+) terminal (A) can be accessed by opening the cover of the engine compartment fuse block. 366 {CAUTION: {CAUTION: Using a match near a battery can cause battery gas to explode. People have been hurt doing this, and some have been blinded. Use a ﬂashlight if you need more light. Be sure the battery has enough water. You do not need to add water to the battery installed in your new vehicle. But if a battery has ﬁller caps, be sure the right amount of ﬂuid is there. If it is low, add water to take care of that ﬁrst. If you do not, explosive gas could be present. Battery ﬂuid contains acid that can burn you. Do not get it on you. If you accidentally get it in your eyes or on your skin, ﬂush the place with water and get medical help immediately. Fans or other moving engine parts can injure you badly. Keep your hands away from moving parts once the engine is running. 5. Check that the jumper cables do not have loose or missing insulation. If they do, you could get a shock. The vehicles could be damaged too. Before you connect the cables, here are some basic things you should know. Positive (+) will go to positive (+) or to a remote positive (+) terminal if the vehicle has one. Negative (−) will go to a heavy, unpainted metal engine part or to a remote negative (−) terminal if the vehicle has one. Do not connect positive (+) to negative (−) or you will get a short that would damage the battery and maybe other parts too. And do not connect the negative (−) cable to the negative (−) terminal on the dead battery because this can cause sparks. 367 6. Connect the red positive (+) cable to the positive (+) terminal of the dead battery. Use a remote positive (+) terminal if the vehicle has one. 7. Do not let the other end touch metal. Connect it to the positive (+) terminal of the good battery. Use a remote positive (+) terminal if the vehicle has one. 8. Now connect the black negative (−) cable to the negative (−) terminal of the good battery. Use a remote negative (−) terminal if the vehicle has one. Do not let the other end touch anything until the next step. The other end of the negative (−) cable does not go to the dead battery. It goes to a heavy, unpainted metal engine part or to a remote negative (−) terminal on the vehicle with the dead battery. 9. Connect the other end of the negative (−) cable at least 18 inches (45 cm) away from the dead battery, but not near engine parts that move. The electrical connection is just as good there, and the chance of sparks getting back to the battery is much less. Your vehicle has a remote negative (−) terminal for this purpose. 10. Now start the vehicle with the good battery and run the engine for a while. 11. Try to start the vehicle that had the dead battery. If it will not start after a few tries, it probably needs service. 368 Notice: If the jumper cables are connected or removed in the wrong order, electrical shorting may occur and damage the vehicle. The repairs would not be covered by your warranty. Always connect and remove the jumper cables in the correct order, making sure that the cables do not touch each other or other metal. Jumper Cable Removal A. Heavy, Unpainted Metal Engine Part or Remote Negative (−) Terminal B. Good Battery or Remote Positive (+) and

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2007 Chevrolet Corvette Owners Manual