2004 Buick Century Owners Manual

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Poorly maintained and improperly used tires are dangerous. (cid:127) 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. (cid:127) 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. (cid:127) Overinﬂated tires are more likely to be cut, punctured or broken by a sudden impact — such as when you hit a pothole. Keep tires at the recommended pressure. (cid:127) Worn, old tires can cause accidents. If your tread is badly worn, or if your tires have been damaged, replace them. 5-57 Tire Sidewall Labeling Useful information about a tire is molded into its sidewall. The examples below show a typical passenger car tire and a compact spare tire sidewall. 5-58 Passenger Car Tire Example (A) Tire Size: The tire size code is a combination of letters and numbers used to deﬁne a particular tire’s width, height, aspect ratio, construction type and service description. See the “Tire Size” illustration later in this section for more detail. (B) Tire Performance Criteria Speciﬁcation (TPC Spec): Original equipment tires designed to GM’s speciﬁc tire performance criteria have a TPC speciﬁcation code molded onto the sidewall. GM’s TPC speciﬁcations meet or exceed all federal safety guidelines. (C) Department of Transportation (DOT): The Department of Transportation (DOT) code indicates that the tire is in compliance with the U.S. Department of Transportation Motor Vehicle Safety Standards. (D) Tire Identiﬁcation Number (TIN): The letters and numbers following DOT code are the Tire Identiﬁcation Number (TIN). The TIN shows the manufacturer and plant code, tire size, and date the tire was manufactured. The TIN is molded onto both sides of the tire, although only one side may have the date of manufacture. (E) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. (F) Uniform Tire Quality Grading (UTQG): Tire manufacturers are required to grade tires based on three performance factors: treadwear, traction and temperature resistance. For more information see Uniform Tire Quality Grading on page 5-70. (G) Maximum Cold Inﬂation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load. For more information on recommended tire pressure see Inﬂation - Tire Pressure on page 5-64 and Loading Your Vehicle on page 4-34. 5-59 (A) Temporary Use Only: The compact spare tire or temporary use tire has a tread life of approximately 3,000 miles (5 000 km) and should not be driven at speeds over 65 mph (105 km/h). The compact spare tire is for emergency use when a regular road tire has lost air and gone ﬂat. See Compact Spare Tire on page 5-87 and If a Tire Goes Flat on page 5-74. (B) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. (C) Tire Identiﬁcation Number (TIN): The Tire Identiﬁcation Number (TIN). The TIN shows the manufacturer and plant code, tire size, and date the tire was manufactured. The TIN is molded onto both sides of the tire, although only one side may have the date of manufacture. (D) Maximum Cold Inﬂation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load. See Compact Spare Tire on page 5-87 and Loading Your Vehicle on page 4-34. (E) Tire Inﬂation: The temporary use tire or compact spare tire should be inﬂated to 60 psi (420 kPa). For more information on tire pressure and inﬂation see Inﬂation - Tire Pressure on page 5-64. Compact Spare Tire Example 5-60 (F) Tire Size: A combination of letters and numbers deﬁne a tire’s width, height, aspect ratio, construction type and service description. The letter “T” as the ﬁrst character in the tire size means the tire is for temporary use only. (A) P-Metric Tire: The United States version of a metric tire sizing system. The letter “P” as the ﬁrst character in the tire size means a passenger vehicle tire engineered to standards set by the U. S. Tire and Rim Association. (G) Tire Performance Criteria Speciﬁcation (TPC Spec): Original equipment tires designed to GM’s speciﬁc tire performance criteria have a TPC speciﬁcation code molded onto the sidewall. GM’s TPC speciﬁcations meet or exceed all federal safety guidelines. Tire Size The following illustration shows an example of a typical passenger car tire size. (B) Tire Width: The three-digit number indicates the tire section width in millimeters from sidewall to sidewall. (C) Aspect Ratio: A two-digit number that indicates the tire height-to-width measurements. For example, if the tire size aspect ratio is “70,” as shown in item “C” of the illustration, it would mean that the tire’s sidewall is 70% as high as it is wide. (D) Construction Code: A letter code is used to indicate the type of ply construction in the tire. The letter “R” means radial ply construction; the letter “D” means diagonal or bias ply construction; and the letter “B” means belted-bias ply construction. (E) Rim Diameter: Diameter of the wheel in inches. (F) Service Description: These characters represent the load range and the speed rating of a tire. The load range represents the load carrying capacity a tire is certiﬁed to carry. The load index can range from 1 to 279. The speed rating is the maximum speed a tire is certiﬁed to carry a load. Speed ratings range from “A” to “Z”. 5-61 Tire Terminology and Deﬁnitions Air Pressure: The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in pounds per square inch (psi) or kilopascal (kPa). Accessory Weight: This means the combined weight of optional accessories. Some examples of optional accessories are, automatic transmission, power steering, power brakes, power windows, power seats, and air conditioning. Curb Weight: This means the weight of a motor vehicle with standard and optional equipment including the maximum capacity of fuel, oil and coolant, but without passengers and cargo. DOT Markings: A code molded into the sidewall of a tire signifying that the tire is in compliance with the U.S. Department of Transportation motor vehicle safety standards. The DOT code includes the Tire Identiﬁcation Number (TIN), an alphanumeric designator which can also identify the tire manufacturer, production plant, brand and date of production. Aspect Ratio: The relationship of a tire’s height to its width. GVWR: Gross Vehicle Weight Rating, see Loading Your Vehicle on page 4-34. Belt: A rubber coated layer of cords that is located between the plies and the tread. Cords may be made from steel or other reinforcing materials. Bead: The tire bead contains steel wires wrapped by steel cords that hold the tire onto the rim. Bias Ply Tire: A pneumatic tire in which the plies are laid at alternate angles less than 90 degrees to the centerline of the tread. Cold Inﬂation Pressure: The amount of air pressure in a tire, measured in pounds per square inch (psi) before a tire has built up heat from driving. See Inﬂation - Tire Pressure on page 5-64. GAWR FRT: Gross Axle Weight Rating for the front axle, see Loading Your Vehicle on page 4-34. GAWR RR: Gross Axle Weight Rating for the rear axle, see Loading Your Vehicle on page 4-34. Intended Outboard Sidewall: The side of an asymmetrical tire that must always face outward when mounted on a vehicle. Kilopascal (kPa): The metric unit for air pressure. There are 6.9 kPa’s to one psi. Light Truck (LT-Metric) Tire: A tire used on light duty trucks and some multipurpose passenger vehicles. 5-62 Load Index: An assigned number ranging from 1 to 279 that corresponds to the load carrying capacity of a tire. Passenger (P-Metric) Tire: A tire used on passenger cars and some light duty trucks and multipurpose vehicles. Maximum Inﬂation Pressure: The maximum air pressure to which a cold tire may be inﬂated. The maximum air pressure is molded onto the sidewall. Maximum Load Rating: The load rating for a tire at the maximum permissible inﬂation pressure for that tire. Maximum Loaded Vehicle Weight: The sum of curb weight; accessory weight; vehicle capacity weight; and production options weight. Normal Occupant Weight: The number of occupants a vehicle is designed to seat multiplied by 150 pounds (68 kg). See Loading Your Vehicle on page 4-34. Occupant Distribution: Designated seating positions. Outward Facing Sidewall: The side of a asymmetrical tire that has a particular side that faces outward when mounted on a vehicle. The side of the tire that contains a whitewall, bears white lettering or bears manufacturer, brand and or model name molding that is higher or deeper than the same moldings on the other sidewall of the tire. Recommended Inﬂation Pressure: Vehicle manufacturer’s recommended tire inﬂation pressure and shown on the tire placard. See Inﬂation - Tire Pressure on page 5-64 and Loading Your Vehicle on page 4-34. Radial Ply tire: A pneumatic tire in which the ply cords that extend to the beads are laid at 90 degrees to the centerline of the tread. Rim: A metal support for a tire and upon which the tire beads are seated. Sidewall: The portion of a tire between the tread and the bead. Speed Rating: An alphanumeric code assigned to a tire indicating the maximum speed at which a tire can operate. Traction: The friction between the tire and the road surface. The amount of grip provided. Tread: The portion of a tire that comes into contact with the road. 5-63 Treadwear Indicators: Narrow bands, sometimes called “wear bars,” that show across the tread of a tire when only 2/32 inch of tread remains. See When It Is Time for New Tires on page 5-68. UTQGS: Uniform Tire Quality Grading Standards, a tire information system that provides consumers with ratings for a tire’s traction, temperature and treadwear. Ratings are determined by tire manufacturers using government testing procedures. The ratings are molded into the sidewall of the tire. See Uniform Tire Quality Grading on page 5-70. Vehicle Capacity Weight: The number of designated seating positions multiplied by 150 lbs. (68 kg) plus the rated cargo load. See Loading Your Vehicle on page 4-34. Vehicle Maximum Load on the Tire: Load on an individual tire due to curb weight, accessory weight, occupant weight and cargo weight. Vehicle Placard: A label permanently attached to a vehicle showing the original equipment tire size and recommended inﬂation pressure. See Loading Your Vehicle on page 4-34. 5-64 Inﬂation - Tire Pressure The tire and loading information label, 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). See Loading Your Vehicle on page 4-34, for the location of your vehicle’s tire and loading information label. 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: Too much ﬂexing Too much heat Tire overloading (cid:127) Bad wear (cid:127) Bad handling (cid:127) Bad fuel economy If your tires have too much air (overinﬂation), you can get the following: (cid:127) Unusual wear (cid:127) Bad handling (cid:127) Rough ride (cid:127) Needless damage from road hazards (cid:127) (cid:127) (cid:127) When to Check Check your tires once a month or more. Don’t forget your compact spare tire. It should be at 60 psi (420 kPa). 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. Check the tire’s inﬂation pressure when the tires are cold. Cold means your vehicle has been sitting for at least three hours or driven no more than 1 mile (1.6 km). Remove the valve cap from the tire valve stem. Press the tire gage ﬁrmly onto the valve to get a pressure measurement. If the cold tire inﬂation pressure matches the recommended pressure on the Tire and Loading Information label, no further adjustment is necessary. If the inﬂation pressure is low, add air until you reach the recommended amount. If you overﬁll the tire, release air by pushing on the metal stem in the center of the tire valve. Recheck the tire pressure with the tire gage. Be sure to put the valve caps back on the valve stems. They help prevent leaks by keeping out dirt and moisture. Tire Pressure Monitor System The tire inﬂation monitor system detects differences in tire rotation speeds that are caused by changes in tire pressure. The system can alert you if a tire is low – but it does not replace normal tire maintenance. See Tires on page 5-57. When the LOW TIRE light comes on the instrument panel, stop as soon as you can and check all the tires for damage. If a tire is ﬂat, see If a Tire Goes Flat on page 5-74. Also, check the tire pressure in all four tires as soon as possible. See Inﬂation - Tire Pressure on page 5-64. In order for the tire inﬂation system to function properly, the vehicle must be driven between 45 and 90 minutes before the system determines the tire pressure in each tire. The driving time may be longer depending on an individual’s driving habits. The data does not have to be accumulated during a single trip. Once determined, the system will store the tire pressures until the system is reset. 5-65 The system normally takes 15 to 20 minutes of driving time in each of three speed ranges to determine tire pressures. The speed ranges are 15 to 40 mph (25 to 65 km/h), 40 to 65 mph (65 to 105 km/h) and above 65 mph (105 km/h). When the storage of the tire inﬂation information is complete, the LOW TIRE light will come on the instrument panel after two to eight minutes if one tire is inﬂated 12 psi (83 kPa) less than the other three tires. Detection thresholds may be higher and detection times may be longer on rough roads, curves and at high speeds. The system is not capable of inﬂation differences at speeds greater than 70 mph (110 km/h). The tire inﬂation monitor system will not alert you if the pressure in more than one tire is low, if the system is not properly calibrated, or if the vehicle is moving faster than 70 mph (110 km/h). The LOW TIRE light will stay on while the ignition is on, until the system is reset Do not reset the tire inﬂation monitor system without ﬁrst correcting the cause of the problem and checking and adjusting the pressure in all four tires. If the system is reset when the tire pressures are incorrect, it will not function properly and may not alert you when a tire is low. Any time a tire’s pressure is adjusted, the tires are rotated, or one or more tires is repaired or replaced, the tire inﬂation monitor system will need to be reset. The system also needs to be reset when new tires are purchased and if the vehicle’s battery has been disconnected. To reset the system: 1. Turn the ignition to RUN. 2. Remove the passenger’s side instrument panel cover to get to the fuse block. 3. Press and hold the RESET button in the fuse block for about ﬁve seconds. 4. The LOW TIRE light will come on and ﬂash three times. Then it will go off. If the light does not go off, see your dealer for service. 5-66 Tire Inspection and Rotation Tires should be rotated every 5,000 to 8,000 miles (8 000 to 13 000 km). Any time you notice unusual wear, rotate your tires as soon as possible and check wheel alignment. Also check for damaged tires or wheels. See When It Is Time for New Tires on page 5-68 and Wheel Replacement on page 5-72 for more information. The purpose of regular rotation is to achieve more uniform wear for all tires on the vehicle. The ﬁrst rotation is the most important. See Scheduled Maintenance on page 6-4 for scheduled rotation intervals. When rotating your tires, always use the correct rotation pattern shown here. Don’t include the compact spare tire in your tire rotation. After the tires have been rotated, adjust the front and rear inﬂation pressures as shown on the Tire and Loading Information label. Reset the Tire Inﬂation Monitor System. See Tire Pressure Monitor System on page 5-65. Make certain that all wheel nuts are properly tightened. See “Wheel Nut Torque” under Capacities and Speciﬁcations on page 5-103. {CAUTION: Rust or dirt on a wheel, or on the parts to which it is fastened, can make 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 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. See “Changing a Flat Tire” in the Index. 5-67 When It Is Time for New Tires 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. You need a new tire if any of the following statements are true: (cid:127) You can see the indicators at three or more places around the tire. (cid:127) 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. 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. 5-68 (cid:127) (cid:127) (cid:127) Buying New Tires To ﬁnd out what kind and size of tires your vehicle needs, look at the tire and loading information label. For more information about this label and its location on your vehicle, see Loading Your Vehicle on page 4-34. 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, GM recommends that you get tires 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, load range, 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. {CAUTION: Mixing tires could cause you to lose control while driving. If you mix tires of different sizes or types (radial and bias-belted tires), the vehicle may not handle properly, and you could have a crash. Using tires of different sizes may also cause damage to your vehicle. Be sure to use the same size and type tires on all wheels. It’s all right to drive with your compact spare temporarily, it was developed for use on your vehicle. See “Compact Spare Tire” in the index. {CAUTION: If you use bias-ply tires on your vehicle, the wheel rim ﬂanges could develop cracks after many miles of driving. A tire and/or wheel could fail suddenly, causing a crash. Use only radial-ply tires with the wheels on your vehicle. 5-69 Uniform Tire Quality Grading Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example: Treadwear 200 Traction AA Temperature A 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 (1.5) 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 – AA, A, B, C The traction grades, from highest to lowest, are AA, A, B, and C. Those grades 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 straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics. 5-70 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. Scheduled wheel alignment and wheel balancing are not needed. 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. 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. 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. 5-71 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 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 vehicle. {CAUTION: 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 or odometer calibration, headlamp aim, bumper height, vehicle ground clearance and tire or tire chain clearance to the body and chassis. See Changing a Flat Tire on page 5-75 for more information. 5-72 Used Replacement Wheels {CAUTION: Putting a used wheel on your vehicle is dangerous. You can’t know how it’s been used or how far it’s been driven. It could fail suddenly and cause a crash. If you have to replace a wheel, use a new GM original equipment wheel. Tire Chains Notice: Use tire chains only where legal and only when you must. Use only SAE Class “S” type chains that are the proper size for your tires. Install them on the front tires and tighten them as tightly as possible with the ends securely fastened. Drive slowly and follow the chain manufacturer’s instructions. If you can hear the chains contacting your vehicle, stop and retighten them. If the contact continues, slow down until it stops. Driving too fast or spinning the wheels with chains on will damage your vehicle. 5-73 If a Tire Goes Flat It’s unusual for a tire to “blowout” while you’re driving, especially if you maintain your tires properly. If air goes out of a tire, it’s much more likely to leak out slowly. But if you should ever have a “blowout,” here are a few tips about what to expect and what to do: If a front tire fails, the ﬂat tire will create a drag that pulls the vehicle toward that side. Take your foot off the accelerator pedal and grip the steering wheel ﬁrmly. Steer to maintain lane position, and then gently brake to a stop well out of the traffic lane. A rear blowout, particularly on a curve, acts much like a skid and may require the same correction you’d use in a skid. In any rear blowout, remove your foot from the accelerator pedal. Get the vehicle under control by steering the way you want the vehicle to go. It may be very bumpy and noisy, but you can still steer. Gently brake to a stop, well off the road if possible. {CAUTION: Lifting a vehicle and getting under it to do maintenance or repairs is dangerous without the appropriate safety equipment and training. The jack provided with your vehicle is designed only for changing a ﬂat tire. If it is used for anything else, you or others could be badly injured or killed if the vehicle slips off the jack. Use the jack provided with your vehicle only for changing a ﬂat tire. If a tire goes ﬂat, the next part shows how to use your jacking equipment to change a ﬂat tire safely. 5-74 Changing a Flat Tire If a tire goes ﬂat, avoid further tire and wheel damage by driving slowly to a level place. Turn on the hazard warning ﬂashers. {CAUTION: Changing a tire can cause an injury. The vehicle can slip off the jack and roll over you or other people. You and they could be badly injured. Find a level place to change your tire. To help prevent the vehicle from moving: 1. Set the parking brake ﬁrmly. 2. Put the shift lever in PARK (P). 3. Turn off the engine. To be even more certain the vehicle won’t move, you can put blocks at the front and rear of the tire farthest away from the one being changed. That would be the tire on the other side of the vehicle, at the opposite end. The following steps tell how to use the jack and change a tire. 5-75 Removing the Spare Tire and Tools The equipment you will need is in the trunk. 1. Turn the center nut on the compact spare tire cover counterclockwise to remove it. Then lift and remove the cover. See Compact Spare Tire on page 5-87 for more information about the compact spare tire. 2. Remove the spare tire. 5-76 3. Turn the nut holding the jack counterclockwise and remove it. Then remove the jack and wrench. The tools you will be using include the jack (A), extension and protection guide (B) and wheel wrench (C). 5-77 Removing the Wheel Covers If the vehicle has wheel covers, be sure to use a wheel wrench to begin the process of loosening the plastic wheel nut caps. Once the plastic nut caps have been loosened with the wheel wrench, ﬁnish loosening them with your ﬁngers. Removing the Wheel Center Caps To remove a center cap, use the wrench to pry gently at the notch. Do not use a tool that is narrower than the wrench to pry at this notch. Then pry off the cap. Then, using the ﬂat end of the wheel wrench, pry along the edge of the wheel cover until it comes off. Be careful; the edge may be sharp. Do not try to remove the cover with your bare hands. 5-78 Removing the Flat Tire and Installing the Spare Tire 1. Using the wheel wrench, loosen all the wheel nuts, but do not remove them yet. 2. Turn the jack handle clockwise to raise the jack lift head. 3. For jacking at the vehicle’s front location, put the jack lift head (C) about 6 inches (15 cm) from the rear edge of the front wheel opening (B) or just behind the two bolts (A) as shown. 5-79 {CAUTION: 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. {CAUTION: Raising your vehicle with the jack improperly positioned can damage the vehicle and even make the vehicle fall. To help avoid personal injury and vehicle damage, be sure to ﬁt the jack lift head into the proper location before raising the vehicle. For jacking at the vehicle’s rear location, put the jack lift head (B) about 5 inches (13 cm) from the front edge of the rear wheel opening (C) or just behind the off-set (A) as shown. 4. Put the compact spare tire near you. 5-80 5. Raise the vehicle by turning the jack handle clockwise. Raise the vehicle far enough off the ground for the spare compact tire to ﬁt underneath the wheel well. 6. Remove all wheel nuts and take off the ﬂat tire. 5-81 7. Remove any rust or dirt from the wheel bolts, mounting surfaces and spare wheel. {CAUTION: 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. {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. 5-82 8. Install the compact spare tire. Put the wheel nuts back on with the rounded end of the nuts toward the wheel. Tighten each nut by hand until the wheel is held against the hub. 9. Lower the vehicle by turning the jack handle counterclockwise. Lower the jack completely. 5-83 10. Tighten the wheel nuts ﬁrmly in a crisscross sequence as shown. CAUTION: (Continued) Stop somewhere as soon as you can and have the nuts tightened with a torque wrench to the proper torque speciﬁcation. See “Capacities and Speciﬁcations” in the Index for wheel nut torque speciﬁcation. Improperly tightened wheel nuts can lead Notice: to brake pulsation and rotor damage. To avoid expensive brake repairs, evenly tighten the wheel nuts in the proper sequence and to the proper torque speciﬁcation. See “Capacities and Speciﬁcations” in the index for the wheel nut torque speciﬁcation. Do not try to put the wheel cover on your compact spare tire. It will not ﬁt. Store the wheel cover in the trunk until you have the ﬂat tire repaired or replaced. Notice: Wheel covers will not ﬁt on your compact spare. If you try to put a wheel cover on the compact spare, you could damage the cover or the spare. {CAUTION: Incorrect wheel nuts or improperly tightened wheel nuts can cause the wheel to come 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. CAUTION: (Continued) 5-84 Storing the Flat Tire and Tools {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. After the compact spare tire is put on the vehicle, store the ﬂat tire in the trunk. Use the following procedure to secure the ﬂat tire in the trunk. When storing a full-size tire, use the extension with the protector, located in the foam holder, to help avoid wheel surface damage. To store a full-size tire, place the tire valve stem facing down, and then remove the protector and attach the retainer securely. Store the cover as far forward as possible. 5-85 A. Retainer B. Cover C. Compact Spare Tire D. Nut E. Jack F. Wheel Wrench G. Extension and Protector H. Bolt Screw I. Foam Holder Storing the Spare Tire and Tools When storing a compact spare tire in the trunk, put the protector/guide back in the foam holder. {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. The compact spare is for temporary use only. Replace the compact spare tire with a full-size tire as soon as you can. See Compact Spare Tire on page 5-87. See the storage instructions label to return the compact spare to the trunk properly. Be sure to calibrate low tire inﬂation system after you replace the compact spare tire with a full-sized tire. See Inﬂation - Tire Pressure on page 5-64. 5-86 Compact Spare Tire Although the compact spare tire was fully inﬂated when the vehicle was new, it can lose air after a time. Check the inﬂation pressure regularly. It should be 60 psi (420 kPa). After installing the compact spare on the vehicle, check to make sure it is correctly inﬂated. The compact spare is made to perform well at speeds up to 65 mph (105 km/h) for distances up to 3,000 miles (5 000 km). However, It is best to replace the compact spare with a full-size tire as soon as possible. The spare will last longer and be in good shape in case it is needed again. The tire inﬂation monitor system must be reset after installing or removing the compact spare. See Tire Pressure Monitor System on page 5-65. 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. Do not use the compact spare on other vehicles. Do not mix the compact spare tire or wheel with other wheels or tires. They will not ﬁt. Keep the spare tire and its wheel together. Notice: Tire chains won’t ﬁt your compact spare. Using them can damage your vehicle and can damage the chains too. Don’t use tire chains on your compact spare. 5-87 Do not use any of these unless this manual says you can. In many uses, these will damage your vehicle: (cid:127) Alcohol Laundry Soap (cid:127) Bleach (cid:127) Reducing Agents Cleaning the Inside of Your Vehicle Use a vacuum cleaner often to get rid of dust and loose dirt. Wipe vinyl, leather, plastic and painted surfaces with a clean, damp cloth. Cleaning Fabric/Carpet Your dealer has cleaners for the cleaning of fabric and carpet. They will clean normal spots and stains very well. You can get GM-approved cleaning products from your dealer. See Vehicle Care/Appearance Materials on page 5-95. Appearance Care Remember, cleaning products can be hazardous. Some are toxic. Others can burst into ﬂames 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 vehicle, be sure to follow the manufacturer’s warnings and instructions. And always open your doors or windows when you are cleaning the inside. Never use these to clean your vehicle: (cid:127) Gasoline (cid:127) Benzene (cid:127) Naphtha (cid:127) Carbon Tetrachloride (cid:127) Acetone (cid:127) Paint Thinner Turpentine Lacquer Thinner (cid:127) Nail Polish Remover They can all be hazardous — some more than others — and they can all damage your vehicle, too. 5-88 (cid:127) (cid:127) (cid:127) Here are some cleaning tips: (cid:127) Always read the instructions on the cleaner label. (cid:127) Clean up stains as soon as you can — before they set. (cid:127) Carefully scrape off any excess stain. (cid:127) Use a clean cloth or sponge, and change to a clean area often. A soft brush may be used if stains are stubborn. If a ring forms on fabric after spot cleaning, clean the entire area immediately or it will set. Using Cleaner on Fabric 1. Vacuum and brush the area to remove any loose dirt. 2. Always clean a whole trim panel or section. Mask surrounding trim along stitch or welt lines. 3. Follow the directions on the container label. 4. Apply cleaner with a clean sponge. Do not saturate the material and do not rub it roughly. 5. As soon as you have cleaned the section, use a sponge to remove any excess cleaner. 6. Wipe cleaned area with a clean, water-dampened towel or cloth. 7. Wipe with a clean cloth and let dry. Special Fabric Cleaning Problems Stains caused by such things as catsup, coffee (black), egg, fruit, fruit juice, milk, soft drinks, vomit, urine and blood can be removed as follows: 1. Carefully scrape off excess stain, then sponge the soiled area with cool water. 2. If a stain remains, follow the cleaning instructions described earlier. 3. If an odor lingers after cleaning vomit or urine, treat the area with a water and baking soda solution: 1 teaspoon (5 ml) of baking soda to 1 cup (250 ml) of lukewarm water. 4. Let dry. Stains caused by candy, ice cream, mayonnaise, chili sauce and unknown stains can be removed as follows: 1. Carefully scrape off excess stain. 2. Clean with cool water and allow to dry completely. 3. If a stain remains, follow the cleaner instructions described earlier. 5-89 (cid:127) Cleaning Vinyl Use warm water and a clean cloth. (cid:127) Rub with a clean, damp cloth to remove dirt. You may have to do this more than once. Things like tar, asphalt and shoe polish will stain if you do not get them off quickly. Use a clean cloth and vinyl cleaner. See your dealer for this product. Cleaning Leather Use a soft cloth with lukewarm water and a mild soap or saddle soap and wipe dry with a soft cloth. Then, let the leather dry naturally. Do not use heat to dry. For stubborn stains, use a leather cleaner. (cid:127) Never use oils, varnishes, solvent-based or abrasive cleaners, furniture polish or shoe polish on leather. (cid:127) Soiled or stained leather should be cleaned immediately. If dirt is allowed to work into the ﬁnish, it can harm the leather. 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 Interior Plastic Components Use only a mild soap and water solution on a soft cloth or sponge. Commercial cleaners may affect the surface ﬁnish. Cleaning Glass Surfaces Glass should be cleaned often. GM Glass Cleaner or a liquid household glass cleaner will remove normal tobacco smoke and dust ﬁlms on interior glass. See Vehicle Care/Appearance Materials on page 5-95. Notice: glass surfaces on your vehicle, you could scratch the glass and/or cause damage to the rear window defogger and the integrated radio antenna. When cleaning the glass on your vehicle, use only a soft cloth and glass cleaner. If you use abrasive cleaners when cleaning 5-90 (cid:127) (cid:127) Care of Safety Belts Keep belts clean and dry. {CAUTION: 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. 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 on page 6-12. Cleaning the Outside of Your Vehicle The paint ﬁnish on your vehicle provides 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. Do not wash your vehicle in the direct rays of the sun. Use a car washing soap. Do not use strong soaps or chemical detergents. Be sure to rinse the vehicle well, removing all soap residue completely. You can get GM-approved cleaning products from your dealer. See Vehicle Care/Appearance Materials on page 5-95. Do not 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 an all-cotton towel to avoid surface scratches and water spotting. High pressure car washes may cause water to enter your vehicle. 5-91 Cleaning Exterior Lamps/Lenses Use only lukewarm or cold water, a soft cloth and a car washing soap to clean exterior lamps and lenses. Follow instructions under “Washing Your Vehicle.” Finish Care Occasional waxing or mild polishing of your vehicle by hand may be necessary to remove residue from the paint ﬁnish. You can get GM-approved cleaning products from your dealer. See Vehicle Care/Appearance Materials on page 5-95. Your vehicle 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 basecoat/clearcoat paint ﬁnish. Notice: Machine compounding or aggressive polishing on a basecoat/clearcoat paint ﬁnish may damage it. Use only non-abrasive waxes and polishes that are made for a basecoat/clearcoat paint ﬁnish on your vehicle. 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 vehicle garaged or covered whenever possible. Cleaning Windshield and Wiper Blades If the windshield is not clear after using the windshield washer, or if the wiper blade chatters when running, wax, sap or other material may be on the blade or windshield. Clean the outside of the windshield with a full-strength glass cleaning liquid. The windshield is clean if beads do not form when you rinse it with water. Grime from the windshield will stick to the wiper blades and affect their performance. Clean the blade by wiping vigorously with a cloth soaked in full-strength windshield washer solvent. Then rinse the blade with water. Check the wiper blades and clean them as necessary; replace blades that look worn. 5-92 Cleaning Aluminum Wheels Keep your wheels clean using a soft clean cloth with mild soap and water. Rinse with clean water. After rinsing thoroughly, dry with a soft clean towel. A wax may then be applied. The surface of these wheels is similar to the painted surface of your vehicle. Do not use strong soaps, chemicals, abrasive polishes, abrasive cleaners, cleaners with acid, or abrasive cleaning brushes on them because you could damage the surface. Do not use chrome polish on aluminum wheels. Do not take your vehicle through an automatic car wash that has silicone carbide tire cleaning brushes. These brushes can also damage the surface of these wheels. Cleaning Tires To clean your tires, use a stiff brush with tire cleaner. Notice: Using petroleum-based tire dressing products on your vehicle may damage the paint ﬁnish and/or tires. When applying a tire dressing, always wipe off any overspray from all painted surfaces on your vehicle. Sheet Metal Damage If your vehicle is damaged and requires sheet metal repair or replacement, make sure the body repair shop applies anti-corrosion material to parts repaired or replaced to restore corrosion protection. Original manufacturer replacement parts will provide the corrosion protection while maintaining the warranty. Finish Damage Any stone chips, fractures or deep scratches in the ﬁnish should be repaired right away. Bare metal will corrode quickly and may develop into major repair expense. Minor chips and scratches can be repaired with touch-up materials avaliable from your dealer. Larger areas of ﬁnish damage can be corrected in your dealer’s body and paint shop. 5-93 Underbody Maintenance Chemicals used for ice and snow removal and dust control can collect on the underbody. If these are not removed, corrosion and rust can develop on the underbody parts such as fuel lines, frame, ﬂoor pan and exhaust system even though they have corrosion protection. At least every spring, ﬂush these materials from the underbody with plain water. Clean any areas where mud and debris can collect. Dirt packed in close areas of the frame should be loosened before being ﬂushed. Your dealer or an underbody car washing system can do this for you. Chemical Paint Spotting Some weather and atmospheric conditions can create a chemical fallout. Airborne pollutants can fall upon and attack painted surfaces on your vehicle. This damage can take two forms: blotchy, ring-shaped discolorations, and small, irregular dark spots etched into the paint surface. Although no defect in the paint job causes this, GM will repair, at no charge to the owner, the surfaces of new vehicles damaged by this fallout condition within 12 months or 12,000 miles (20 000 km) of purchase, whichever occurs ﬁrst. 5-94 Vehicle Care/Appearance Materials See your GM dealer for more information on purchasing the following products. Vehicle Care/Appearance Materials (cont’d) Description Usage Vehicle Care/Appearance Materials Swirl Remover Polish Description Polishing Cloth Wax-Treated Tar and Road Oil Remover Chrome Cleaner and Polish White Sidewall Tire Cleaner Vinyl Cleaner Glass Cleaner Chrome and Wire Wheel Cleaner Finish Enhancer Usage Interior and exterior polishing cloth. Removes tar, road oil and asphalt. Use on chrome or stainless steel. Removes soil and black marks from whitewalls. Cleans vinyl tops, upholstery and convertible tops. Removes dirt, grime, smoke and ﬁngerprints. Removes dirt and grime from chrome wheels and wire wheel covers. Removes dust, ﬁngerprints, and surface contaminants. Spray on wipe off. Cleaner Wax Foaming Tire Shine Low Gloss Wash Wax Concentrate Spot Lifter Odor Eliminator Removes swirl marks, ﬁne scratches and other light surface contamination. Removes light scratches and protects ﬁnish. Cleans, shines and protects in one easy step, no wiping necessary. Medium foaming shampoo. Cleans and lightly waxes. Biodegradable and phosphate free. Quickly and easily removes spots and stains from carpets, vinyl and cloth upholstery. Odorless spray odor eliminator used on fabrics, vinyl, leather and carpet. See your General Motors parts department for these products. See Recommended Fluids and Lubricants on page 6-12. 5-95 Vehicle Identiﬁcation Vehicle Identiﬁcation Number (VIN) This is the legal identiﬁer for your vehicle. It appears on a plate in the front corner of the instrument panel, on the driver’s side. You can see it if you look through the windshield from outside your vehicle. The VIN also appears on the Vehicle Certiﬁcation and Service Parts labels and the certiﬁcates of title and registration. Engine Identiﬁcation The 8th character in your VIN is the engine code. This code will help you identify your engine, speciﬁcations and replacement parts. Service Parts Identiﬁcation Label This label is located on the inside of the trunk lid. It is very helpful if parts need to be ordered for the vehicle. It has the following information printed on it: The VIN The model designation (cid:127) Paint information (cid:127) A list of all production options and special equipment Do not remove this label from the vehicle. 5-96 (cid:127) (cid:127) Electrical System Add-On Electrical Equipment Notice: Don’t add anything electrical to your vehicle unless you check with your dealer ﬁrst. Some electrical equipment can damage your vehicle and the damage wouldn’t be covered by your warranty. Some add-on electrical equipment can keep other components from working as they should. The vehicle has an air bag system. Before attempting to add anything electrical to the vehicle, see Servicing Your Air Bag-Equipped Vehicle on page 1-58. Headlamp Wiring The headlamp wiring is protected by a circuit breaker in the underhood fuse block. An electrical overload will cause the headlamps to go on and off, or in some cases to remain off. If this happens, have the headlamp system checked right away. Windshield Wiper Fuses The windshield wiper motor is protected by a circuit breaker and a fuse. If the motor overheats due to heavy snow, etc., the wiper will stop until the motor cools. If the overload is caused by some electrical problem, have it ﬁxed. Power Windows and Other Power Options Circuit breakers in the instrument panel fuse block protect the power windows and other power accessories. When the current load is too heavy, the circuit breaker opens and closes, protecting the circuit until the problem is ﬁxed. Fuses and Circuit Breakers The wiring circuits in the vehicle are protected from short circuits by a combination of fuses, circuit breakers and in the fuse block wiring itself. This greatly reduces the chance of ﬁres caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure a bad fuse is replaced with a new one of the identical size and rating. 5-97 Instrument Panel Fuse Block Some fuses are located in a fuse block on the passenger’s side of the instrument panel. Pull off the cover labeled FUSES to expose the fuse block. 5-98 Circuit Breakers Usage TIRE RESET PWR/WNDW PWR S/ROOF Power Windows, Power Sunroof Tire Inﬂation Monitor Reset Button R/DEFOG PWR/ SEAT Blank Rear Window Defogger Power Seat Not Used Fuses PRK/LCK Blank Blank PCM, BCM, U/H Usage Ignition Key Solenoid Not Used Not Used Ignition Signal: Hot in Run and Start, Powertrain Control Module, Body Control Module, Underhood Relay RADIO PREM. SOUND PWR MIR Blank INT/ILLUM Blank IGN 0: CLSTR, PCM & BCM Remote Radio Premium Sound Power Mirrors Not Used Panel Dimming Not Used Ignition Signal: Hot in Run, Unlock and Start; Cluster, Powertrain Control Module, Body Control Module Fuses Blank Blank Blank ACCY PWR BUS DR/ LCK Blank R/LAMPS Blank CRUISE Blank CLSTR LTR Usage Not Used Not Used Not Used Interior Lamps Door Locks Not Used Taillamps, License Plate Lamps Not Used Cruise Control Not Used Instrument Panel Cluster Cigarette Lighter STOP LAMPS Stoplamps ONSTAR PRK/LGHT Blank CRNK SIG, BCM, CLSTR HVAC OnStar® Parking Lamps Not Used Crank Signal, Body Control Module, Cluster, Powertrain Control Module Ignition Signal, Heating, Ventilation, and Air Conditioning Control Head BTSI (REGAL) Not Used AIR BAG BCM PWR Air Bag Body Control Module 5-99 Underhood Fuse Block Some fuses and relays are located in the underhood fuse block on the passenger’s side of the vehicle in the engine compartment. See Engine Compartment Overview on page 5-12 for more information on location. Fuses HAZRD Usage Hazard Warning Flashers Blank LH HTD SEAT Not Used Not Used Ignition Signal: Hot in ACCESSORY and RUN, Body Control Module Not Used BCM ACCY Blank LOW BLWER Low Blower ABS TRN SIG RADIO, HVAC, RFA, CLSTR ALDL HI BLWR Anti-Lock Brakes Turn Signals, Cornering Lamps Radio, Heating Ventilation and Air Conditioning Head; Remote Keyless Entry, Cluster High Blower RH HTD SEAT Not Used STR/WHL CNTRL WPR Audio Steering Wheel Controls Windshield Wipers 5-100 Fuses Usage Relays Usage 10 11 12 13 14 15 16 17 18 19 Cooling Fan 2 Cooling Fan 3 Starter Solenoid Cooling Fan 1 Ignition Main Air Pump (Optional) Not Used Horn Fog Lamps Not Used Fuel Pump Anti-Lock Brake System Starter Solenoid Power Seat, Rear Window Defogger High Blower, Hazard Flasher, Stoplamps, Power Mirror, Door Locks Ignition Switch, Stoplamps, Anti-Lock Brake System, Turn Signals, Cluster, Air Bag, Daytime Running Lamps Module Cooling Fan Retained Accessory Power, Remote Keyless Entry, Data Link, Heating, Ventilation, and Air Conditioning Head; Cluster, Radio, Cigarette Lighter Ignition Switch, Wipers, Autdio Steering Wheel Controls, Body Control Module, Power Windows, Sunroof, Heating, Ventilation, and Air Conditioning Controls; Daytime Running Lamps, Rear Window Defogger Relay 5-101 Fuses Usage Fuses Usage Not Used Generator Engine Control Module Air Conditioner Compressor Clutch Cooling Fan Electronic Ignition Transaxle Horn Fuel Injector Oxygen Sensor Engine Emissions Fog Lamps Right Headlamp 33 34 35 36 37 38 39 40 41 42 43 Rear Compartment Release Parking Lamps Fuel Pump Left Headlamp Not Used Not Used Not Used Not Used Not Used Not Used Not Used SYMBOL Air Conditioner Compressor Clutch Diode 20 21 22 23 24 25 26 27 28 29 30 31 32 5-102 Capacities and Speciﬁcations Capacities and Speciﬁcations Capacities Application Air Conditioning Refrigerant R134a Automatic Transaxle Pan Removal and Replacement After Complete Overhaul When draining/replacing converter, more ﬂuid will be needed. English 2.4 lbs 7.4 quarts 10.0 quarts Metric 1.1 kg 7.0 L 9.5 L Cooling System Including Reservoir Engine Oil with Filter Fuel Tank Wheel Nut Torque All capacities are approximate. When adding, be sure to ﬁll to the approximate level, as recommended in this manual. 11.7 quarts 4.0 quarts 17.0 gallons 11.0 L 3.8 L 64.0 L 140 Y 100 lb ft Engine 3100 V6 Engine Speciﬁcations VIN Code Transmission Displacement Firing Order Automatic 191 CID 1–2–3–4–5–6 5-103 ✍ NOTES 5-104 Section 6 Maintenance Schedule Maintenance Schedule ......................................6-2 Introduction ...................................................6-2 Maintenance Requirements ..............................6-2 Your Vehicle and the Environment ....................6-2 Using Your Maintenance Schedule ....................6-2 Scheduled Maintenance ...................................6-4 Additional Required Services ............................6-6 Maintenance Footnotes ...................................6-7 Owner Checks and Services ............................6-8 At Each Fuel Fill ............................................6-8 At Least Once a Month ...................................6-9 At Least Once a Year .....................................6-9 Recommended Fluids and Lubricants ...............6-12 Normal Maintenance Replacement Parts ..........6-13 Engine Drive Belt Routing ..............................6-14 Maintenance Record .....................................6-15 6-1 Maintenance Schedule Introduction Important: Keep engine oil at the proper level and change as recommended. Have you purchased the GM Protection Plan? The Plan supplements your new vehicle warranties. See your Warranty and Owner Assistance booklet or your dealer for details. Maintenance Requirements Notice: Maintenance intervals, checks, inspections, replacement parts and recommended ﬂuids and lubricants as prescribed in this manual are necessary to keep your vehicle in good working condition. Any damage caused by failure to follow scheduled maintenance may not be covered by warranty. 6-2 Your Vehicle and the Environment Proper vehicle maintenance not only helps to keep your vehicle in good working condition, but also helps the environment. All recommended maintenance is important. Improper vehicle maintenance can even affect the quality of the air we breathe. Improper ﬂuid levels or the wrong tire inﬂation can increase the level of emissions from your vehicle. To help protect our environment, and to keep your vehicle in good condition, be sure to maintain your vehicle properly. Using Your Maintenance Schedule We at General Motors want to help you keep your vehicle in good working condition. But we do not know exactly how you will drive it. You may drive very short distances only a few times a week. Or you may drive long distances all the time in very hot, dusty weather. You may use your vehicle in making deliveries. Or you may drive it to work, to do errands or in many other ways. Because of all the different ways people use their vehicles, maintenance needs vary. You may need more frequent checks and replacements. So please read the following and note how you drive. If you have any questions on how to keep your vehicle in good condition, see your GM Goodwrench dealer. This schedule is for vehicles that: carry passengers and cargo within recommended limits. You will ﬁnd these limits on the tire and loading information label. See Loading Your Vehicle on page 4-34. are driven on reasonable road surfaces within legal driving limits. use the recommended fuel. See Gasoline Octane on page 5-4. The services in Scheduled Maintenance on page 6-4 should be performed when indicated. See Additional Required Services on page 6-6 and Maintenance Footnotes on page 6-7 for further information. {CAUTION: Performing maintenance work on a vehicle can be dangerous. In trying to do some jobs, you can be seriously injured. Do your own maintenance work only if you have the required know-how and the proper tools and equipment for the job. If you have any doubt, see your GM Goodwrench dealer to have a qualiﬁed technician do the work. Some maintenance services can be complex. So, unless you are technically qualiﬁed and have the necessary equipment, you should have your GM Goodwrench dealer do these jobs. When you go to your GM Goodwrench dealer for your service needs, you will know that GM-trained and supported service technicians will perform the work using genuine GM parts. If you want to get service information, see Service Publications Ordering Information on page 7-11. Owner Checks and Services on page 6-8 tells you what should be checked, when to check it and what you can easily do to help keep your vehicle in good condition. The proper replacement parts, ﬂuids and lubricants to use are listed in Recommended Fluids and Lubricants on page 6-12 and Normal Maintenance Replacement Parts on page 6-13. When your vehicle is serviced, make sure these are used. All parts should be replaced and all necessary repairs done before you or anyone else drives the vehicle. We recommend the use of genuine GM parts. 6-3 (cid:127) (cid:127) (cid:127) Scheduled Maintenance When the CHANGE OIL SOON light comes on, it means that service is required for your vehicle. Have your vehicle serviced 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 engine oil life system may not indicate that vehicle service 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 GM Goodwrench dealer has GM-trained service technicians who will perform this work using genuine GM parts and reset the system. If the engine oil life system is ever reset accidentally, you must service your vehicle within 3,000 miles (5 000 km) since your last service. Remember to reset the oil life system whenever the oil is changed. See Engine Oil on page 5-13 for information on the Engine Oil Life System and resetting the system. When the CHANGE OIL SOON light appears, certain services, checks and inspections are required. Required services are described in the following for “Maintenance I” and “Maintenance II.” Generally, it is recommended that your ﬁrst service be Maintenance I, your second service be Maintenance II and that you alternate Maintenance I and Maintenance II thereafter. However, in some cases, Maintenance II may be required more often. Maintenance I — Use Maintenance I if the light comes on within ten months since vehicle was purchased or Maintenance II was performed. Maintenance II — Use Maintenance II if the previous service performed was Maintenance I. Always use Maintenance II whenever the light comes on ten months or more since the last service or if the light has not come on at all for one year. 6-4 Service Maintenance I Maintenance II Change engine oil and ﬁlter. Reset oil life system. See Engine Oil on page 5-13. An Emission Control Service. Visually check for any leaks or damage. See footnote (k). Inspect engine air cleaner ﬁlter. If necessary, replace ﬁlter. See Engine Air Cleaner/Filter on page 5-18. An Emission Control Service. See footnote †. Rotate tires and check inﬂation pressures and wear. See Tires on page 5-57. Inspect brake system. See footnote (a). Check engine coolant and windshield washer ﬂuid levels and add ﬂuid as needed. Perform any needed additional services. See “Additional Required Services” in this section. Inspect suspension and steering components. See footnote (b). • • • • • • • Inspect engine cooling system. See footnote (c). Inspect wiper blades. See footnote (d). Inspect restraint system components. See footnote (e). Lubricate body components. See footnote (f). Check transaxle ﬂuid level and add ﬂuid as needed. Replace passenger compartment air ﬁlter. See footnote (g). Inspect throttle system. See footnote (j). • • • • • • • • • • • • • • • 6-5 Additional Required Services The following services should be performed at the ﬁrst maintenance service (I or II) after the indicated miles (kilometers) shown for each item. Service 25,000 (41 500) 50,000 (83 000) 75,000 (125 000) 100,000 (166 000) 125,000 (207 500) 150,000 (240 000) Inspect fuel system for damage or leaks. Inspect exhaust system for loose or damaged components. Replace engine air cleaner ﬁlter. See Engine Air Cleaner/Filter on page 5-18. An Emission Control Service. Change automatic transaxle ﬂuid and ﬁlter (severe service). See footnote (h). Change automatic transaxle ﬂuid and ﬁlter (normal service). Replace spark plugs and inspect spark plug wires. An Emission Control Service. Engine cooling system service (or every 5 years, whichever occurs ﬁrst). An Emission Control Service. See footnote (i). Inspect engine accessory drive belt. An Emission Control Service. 6-6 • • • • • • • • • • • • • • • • • • • • • • • • • Maintenance Footnotes † The U.S. Environmental Protection Agency or the California Air Resources Board has determined that the failure to perform this maintenance item will not nullify the emission warranty or limit recall liability prior to the completion of the vehicle’s useful life. We, however, urge that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded. (a) Visually inspect brake lines and hoses for proper hook-up, binding, leaks, cracks, chaﬁng, etc. Inspect disc brake pads for wear and rotors for surface condition. Inspect other brake parts, including calipers, parking brake, etc. (b) Visually inspect front and rear suspension and steering system for damaged, loose or missing parts or signs of wear. Inspect power steering lines and hoses for proper hook-up, binding, leaks, cracks, chaﬁng, etc. (c) Visually inspect hoses and have them replaced if they are cracked, swollen or deteriorated. Inspect all pipes, ﬁttings and clamps; replace with genuine GM parts as needed. To help ensure proper operation, a pressure test of the cooling system and pressure cap and cleaning the outside of the radiator and air conditioning condenser is recommended at least once a year. (d) Visually inspect wiper blades for wear or cracking. Replace blade inserts that appear worn or damaged or that streak or miss areas of the windshield. (e) Make sure the safety belt reminder light and all your belts, buckles, latch plates, retractors and anchorages are working properly. Look for any other loose or damaged safety belt system parts. If you see anything that might keep a safety belt system from doing its job, have it repaired. Have any torn or frayed safety belts replaced. Also look for any opened or broken air bag coverings, and have them repaired or replaced. (The air bag system does not need regular maintenance.) (f) Lubricate all key lock cylinders. Lubricate all hinges and latches, including those for the body doors, hood, secondary latch, pivots, spring anchor, release pawl, rear compartment, glove box door and console door. More frequent lubrication may be required when exposed to a corrosive environment. Applying silicone grease on weatherstrips with a clean cloth will make them last longer, seal better and not stick or squeak. (g) If you drive regularly under dusty conditions, the ﬁlter may require replacement more often. 6-7 (h) Change automatic transaxle ﬂuid and ﬁlter if the vehicle is mainly driven under one or more of these conditions: − In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. − In hilly or mountainous terrain. − When doing frequent trailer towing. − Uses such as found in taxi, police or delivery service. (i) Drain, ﬂush and reﬁll cooling system. See Engine Coolant on page 5-22 for what to use. Inspect hoses. Clean radiator, condenser, pressure cap and ﬁller neck. Pressure test the cooling system and pressure cap. (j) Check throttle system for interference or binding and for damaged or missing parts. Replace parts as needed. Replace any components that have high effort or excessive wear. Do not lubricate accelerator or cruise control cables. (k) A ﬂuid loss in any vehicle system could indicate a problem. Have the system inspected and repaired and the ﬂuid level checked. Add ﬂuid if needed. Owner Checks and Services These owner checks and services should be performed at the intervals speciﬁed to help ensure the safety, dependability and emission control performance of your vehicle. Your GM Goodwrench dealer can assist you with these checks and services. Be sure any necessary repairs are completed at once. Whenever any ﬂuids or lubricants are added to your vehicle, make sure they are the proper ones, as shown in Recommended Fluids and Lubricants on page 6-12.

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2004 Buick Century Owners Manual