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the socket and press it in until it is tight. If a cargo lamp is replaced, put a new cargo lamp bulb into the socket and press it in until it is tight before turning the socket counterclockwise.


5. Put the bulb holder back plate into the lamp


housing.


6. Reinstall the lamp assembly and tighten the screws.


Pickup Box Identification and Fender Marker Lamps To replace a pickup box identification or fender marker lamp bulb, do the following: 1. Remove the screws and lamp assembly. 2. Unplug the lamp assembly harness. 3. Gently pry the individual lamp from the lamp


housing.


4. Unplug the lamp. 5. Plug in a new lamp and snap it into the housing. 6. Reinstall the lamp housing.


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Taillamps To replace a taillamp bulb, do the following: 1. Open the tailgate. Tailgate on page 2-14 for more


information.


2. Remove the two rear


lamp assembly screws near the tailgate latch and pull out the lamp assembly.


3. Determine which of the following taillamp assembly


applies to your vehicle.


A. Stoplamp B. Turn Signal C. Back-up Lamp


A. Stoplamp B. Turn Signal Lamp C. Back-up Lamp D. Sidemarker Lamp


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4. Press the release tab,


if equipped, and turn the bulb socket counterclockwise to remove it from the taillamp housing.


5. Pull the old bulb straight out from the socket. 6. Press a new bulb into the socket and turn the socket


clockwise into the taillamp housing.


7. Reinstall the rear lamp assembly. 8. Close the tailgate.


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Taillamps (Chassis Cab Models)


Replacement Bulbs


A. Turn Signal Lamp B. Stoplamp C. Back-up Lamp


To replace a taillamp bulb for chassis cab models, do the following:


1. Peel the rubber seal away from the lens using


your hands.


2. Lift the lens off the lamp assembly. 3. Pull the old bulb straight out from the socket. 4. Put a new bulb into the socket and press it in


until it is tight.


5. Reinstall the lens and the lens seal.


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Exterior Lamp


Bulb Number


Back-up Lamp Back-up Lamp* Cargo Lamp Center High-Mounted Stoplamp (CHMSL) Daytime Running Lamps (DRL) Fender Marker Lamps Front Parking and Turn Lamp Front Roof Marker Lamps Headlamps


High-Beam Low-Beam


Rear Marker Lamp, Taillamp and Stoplamp* Rear Turn Signal Lamp Rear Turn Signal Lamp* Sidemarker Lamp (If Equipped) Stoplamp and Taillamp* * Chassis Cab Models


3157
1156
912


912


4114K


194


3457A


194


9005
9006


3157


3157
1156
194
1157


For replacement bulbs not listed here, contact your dealer.


Windshield Wiper Blade Replacement Windshield wiper blades should be inspected at least twice a year for wear and cracking. See Scheduled Maintenance on page 6-4 for more information. Replacement blades come in different types and are removed in different ways. For proper type and length, see Normal Maintenance Replacement Parts on page 6-16. To replace the windshield wiper blade assembly do the following: 1. Lift the wiper arm and turn the blade until


it is facing away from the windshield.


2. Push the release lever and slide the wiper assembly


toward the driver’s side of the vehicle.


3. Install a new blade by reversing Steps 1 and 2.


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Tires Your new vehicle comes with high-quality tires made by a leading tire manufacturer. If you ever have questions about your tire warranty and where to obtain service, see your GM Warranty booklet for details. For additional information refer to the tire manufacturer’s booklet included with your vehicle’s Owner’s Manual.


{CAUTION:


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 on page 4-50.


CAUTION:


(Continued)


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CAUTION:


(Continued)


(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. See Inflation - Tire Pressure on page 5-84.


(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.


20-Inch Tires If your vehicle has the optional 20-inch P275/55R20
size tires, they are classified as touring tires and are designed for on road use. The low-profile, wide tread design is not recommended for “off-road” driving or commercial uses such as snow plowing. See Off-Road Driving on page 4-20 and Adding a Snow Plow or Similar Equipment on page 4-56 for additional information.


Tire Sidewall Labelling Useful information about a tire is molded into the sidewall. The following illustrations are examples of a typical P-Metric and a LT-Metric tire sidewall.


Passenger (P-Metric) Tire


(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) TPC Spec (Tire Performance Criteria Specification): 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) DOT (Department of Transportation): 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.


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(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 5-91.


(G) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load. For information on recommended tire pressure see Inflation - Tire Pressure on page 5-84 and Loading Your Vehicle on page 4-50.


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Light Truck (LT-Metric) Tire


(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) TPC Spec (Tire Performance Criteria Specification): 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) Dual Tire Maximum Load: Maximum load that can be carried and the maximum pressure needed to support that load when used in a dual configuration. For information on recommended tire pressure see Inflation - Tire Pressure on page 5-84 and Loading Your Vehicle on page 4-50.


(D) DOT (Department of Transportation): The Department of Transportation (DOT) code indicates that the tire is in compliance with the U.S. Department of Transportation Motor Vehicle Safety Standards.


(E) 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.


(F) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread.


(G) Single Tire Maximum Load: Maximum load that can be carried and the maximum pressure needed to support that load when used as a single. For information on recommended tire pressure see Inflation - Tire Pressure on page 5-84 and Loading Your Vehicle on page 4-50.


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Tire Size The following examples show the different parts of a tire size.


Passenger (P-Metric) Tire


Light Truck (LT-Metric) Tire


(A) Passenger (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.


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(A) Light Truck (LT-Metric) Tire: The United States version of a metric tire sizing system. The letters LT as the first two characters in the tire size means a light truck tire engineered to standards set by the U.S. Tire and Rim Association.


(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 75, as shown in item C of the light truck (LT-Metric) tire illustration, it would mean that the tire’s sidewall is 75% 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: The service description indicates the load range and speed rating of a tire. The load index can range from 1 to 279. Speed ratings range from A to Z.


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.


Aspect Ratio: The relationship of a tire’s height to its width.


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) or kilopascals (kPa) before a tire has built up heat from driving. See Inflation - Tire Pressure on page 5-84.


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 (DOT) 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.


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GVWR: Gross Vehicle Weight Rating, see Loading Your Vehicle on page 4-50.


Maximum Load Rating: The load rating for a tire at the maximum permissible inflation pressure for that tire.


GAWR FRT: Gross Axle Weight Rating for the front axle, see Loading Your Vehicle on page 4-50.


GAWR RR: Gross Axle Weight Rating for the rear axle, see Loading Your Vehicle on page 4-50.


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.


Light Truck (LT-Metric) Tire: A tire used on light duty trucks and some multipurpose passenger vehicles.


Load Index: An assigned number ranging from 1 to 279
that corresponds to the load carrying capacity of a tire.


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 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 lbs (68 kg). See Loading Your Vehicle on page 4-50.


Occupant Distribution: Designated seating positions.


Outward Facing Sidewall: The side of an 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.


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Passenger (P-Metric) Tire: A tire used on passenger cars and some light duty trucks and multipurpose vehicles.


Recommended Inflation Pressure: Vehicle manufacturer’s recommended tire inflation pressure and shown on the tire placard. See Inflation - Tire Pressure on page 5-84 and Loading Your Vehicle on page 4-50.


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.


Treadwear Indicators: Narrow bands, sometimes called “wear bars,” that show across the tread of a tire when only 1/16 inch (1.6 mm) of tread remains. See When It Is Time for New Tires on page 5-89.


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 5-91.


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 4-50.


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 vehicle’s capacity weight and the original equipment tire size and recommended inflation pressure. See “Tire and Loading Information Label” under Loading Your Vehicle on page 4-50.


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A Tire and Loading Information label is attached to the vehicle’s center pillar (B-pillar), below the driver’s door lock post (striker). This label lists your vehicle’s original equipment tires and their recommended cold tire inflation pressures. The recommended cold tire inflation pressure, shown on the label, is the minimum amount of air pressure needed to support your vehicle’s maximum load carrying capacity. For additional information regarding how much weight your vehicle can carry, and an example of the tire and loading information label, see Loading Your Vehicle on page 4-50.


Inflation - Tire Pressure Tires need the correct amount of air pressure to operate effectively. Notice: Do not let anyone tell you that under-inflation or over-inflation is all right. It is not. If your tires do not have enough air (under-inflation), you can get the following:


Too much flexing Too much heat Tire overloading


(cid:127) Premature or irregular wear (cid:127) Poor handling (cid:127) Reduced fuel economy If your tires have too much air (over-inflation), you can get the following: (cid:127) Unusual wear (cid:127) Poor handling (cid:127) Rough ride (cid:127) Needless damage from road hazards


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(cid:127) (cid:127) (cid:127) Improved Ride with Light Load


{CAUTION:


Do not overload your vehicle or underinflate the tires. Overloading your vehicle or underinflating the tires can cause rapid loss of pressure and cause a serious crash. Only use reduced rear tire pressure when your vehicle meets the criteria for a light load.


If you have a 1500 or 2500 Series truck with LT245/75R16E size tires and you are operating your vehicle under light-load conditions, you can improve ride quality by adjusting both the front and rear cold tires to the recommended pressure shown on the Improved Ride label.


When to Check Check your tires once a month or more. Do not forget to check the spare tire. For additional information regarding the spare tire, see Spare Tire on page 5-117. How to Check Use a good quality pocket-type gage to check tire pressure. You cannot 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.


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(cid:127) No trailer is attached to your vehicle. (cid:127) You have not added any additional equipment to


your vehicle, like a truck cap or tool box.


The vehicle load capacity and the rear axle load capacity are reduced when the tire pressure is lowered to the amount recommended for improved ride. Before operating your vehicle with passengers or cargo greater than a light-load, you must inflate the rear tires to the recommended cold tire pressure shown on the Tire and Loading Information Label. See Loading Your Vehicle on page 4-50.


Dual Tire Operation When the vehicle is new, or whenever a wheel, wheel bolt or wheel nut is replaced, check the wheel nut torque after 100, 1,000 and 6,000 miles (160, 1 600 and 10 000 km) of driving. For proper torque and wheel nut tightening information, see Removing the Spare Tire and Tools on page 5-97. The outer tire on a dual wheel setup generally wears faster than the inner tire. Your tires will wear more evenly and last longer if you rotate the tires periodically, see Tire Inspection and Rotation on page 5-87. Also see Scheduled Maintenance on page 6-4.


An example of the Improved Ride label is shown here. This label is attached to the lower section of the driver’s door edge, for 1500 and 2500 Series trucks equipped with LT245/75R16E size tires. Operating your vehicle with a light load means:


The total weight of occupants in your vehicle is less than the total seating capacity number your vehicle was designed to carry multiplied by 150 lbs (68 kg). The total seating capacity number is on the Tire and Loading Information label.


(cid:127) No more than 200 lbs (91 kg) of cargo, which must


be secured in the cargo area.


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(cid:127) {CAUTION:


If you operate your vehicle with a tire that is badly underinflated, the tire can overheat. An overheated tire can lose air suddenly or catch fire. You or others could be injured. Be sure all tires (including the spare) are properly inflated.


See Inflation - Tire Pressure on page 5-84, for information on proper tire inflation.


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 5-89 and Wheel Replacement on page 5-92 for more information. Make sure the spare tire is stored securely. Push, pull, and then try to rotate or turn the tire. If it moves, use the wheel wrench/hoist shaft to tighten the cable. See Changing a Flat Tire on page 5-96.


If your vehicle has dual rear wheels, also see Dual Tire Operation on page 5-86. 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.


If your vehicle has single rear wheels and the tread design for your front tires is the same as your rear tires, use the rotation pattern shown here when rotating your tires. If your vehicle is an SS model, the spare tire is not designed to be used in the tire rotation.


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If your vehicle has dual rear wheels and the tread design for your front tires is the same as your rear tires, always use one of the correct rotation patterns shown here when rotating your tires.


If your vehicle has dual rear wheels and the tread design for the front tires is different from the dual rear tires, always use the correct rotation pattern shown here when rotating your tires. The dual tires are rotated as a pair, and the inside rear tires become the outside rear tires. When you install dual wheels, be sure the vent holes in the inner and outer wheels on each side are lined up.


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After the tires have been rotated, adjust the front and rear inflation pressures as shown on the Tire and Loading Information label. See Loading Your Vehicle on page 4-50. Make certain that all wheel nuts are properly tightened. See “Wheel Nut Torque” under Capacities and Specifications on page 5-136.


{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 needed, to get all the rust or dirt off. See Changing a Flat Tire on page 5-96.


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. Some commercial truck tires may not have treadwear indicators.


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.


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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.


Buying New Tires To find out what kind and size of tires you need, look at the Certification/Tire label. See Loading Your Vehicle on page 4-50, for more information about this Certification/Tire label and where it can be found on your vehicle. The tires installed on your vehicle when it was new had a Tire Performance Criteria Specifications (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).


Whenever you 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. Your vehicle may be equipped with a different size spare than the road tires (those originally installed on your vehicle). When new, your vehicle included a spare tire and wheel assembly with a similar overall diameter as your vehicle’s road tires and wheels, so it is all right to drive on it. Because this spare was developed for use on your vehicle, it will not affect vehicle handling.


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(cid:127) (cid:127) (cid:127) {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.


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.


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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. 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.


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. If you notice unusual tire wear or your vehicle pulling one way or the other, the alignment may need to be reset. If you notice your vehicle vibrating when driving on a smooth road, your wheels may need to be rebalanced.


Wheel Replacement Replace any wheel that is bent, cracked, or badly rusted or corroded. If wheel nuts keep coming loose, the wheel, wheel bolts and wheel nuts should be replaced. If the wheel leaks air, replace it (except some aluminum wheels, which can sometimes be repaired). See your dealer if any of these conditions exist. Your dealer will know the kind of wheel you need.


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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.


Whenever a wheel, wheel bolt or wheel nut is replaced on a dual wheel setup, check the wheel nut torque after 100, 1,000 and 6,000 miles (160, 1 600 and 10 000 km) of driving. For proper torque, see “Wheel Nut Torque” under Capacities and Specifications on page 5-136. See Changing a Flat Tire on page 5-96 for more information. 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.


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If your vehicle does not have dual wheels


Notice: and is equipped with a tire size other than P265/75R16, LT265/75R16, P265/70R17 or P275/55R20, use tire chains only where legal and only when you must. Use chains that are the proper size for your tires. Install them on the tires of the rear axle. Don’t use chains on the tires of the front axle. 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.


Tire Chains


{CAUTION:


If your vehicle has dual wheels or P265/75R16, LT265/75R16, P265/70R17 or P275/55R20 size tires, don’t use tire chains. They can damage your vehicle because there’s not enough clearance. Tire chains used on a vehicle without the proper amount of clearance can cause damage to the brakes, suspension or other vehicle parts. The area damaged by the tire chains could cause you to lose control of your vehicle and you or others may be injured in a crash. Use another type of traction device only if its manufacturer recommends it for use on your vehicle and tire size combination and road conditions. Follow that manufacturer’s instructions. To help avoid damage to your vehicle, drive slowly, readjust or remove the device if it’s contacting your vehicle, and don’t spin your wheels. If you do find traction devices that will fit, install them on the rear tires.


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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.


5-95


Changing a Flat Tire If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place. Turn on your hazard warning flashers.


5-96


{CAUTION:


Changing a tire can be dangerous. The vehicle can slip off the jack and roll over or fall on you or other people. You and they could be badly injured or even killed. Find a level place to change your tire. To help prevent the vehicle from moving:


1. Set the parking brake firmly. 2. Put an automatic transmission shift lever in PARK (P), or shift a manual transmission to FIRST (1) or REVERSE (R).


3. If you have a four-wheel-drive vehicle, be


sure the transfer case is in a drive gear--not in NEUTRAL.


4. Turn off the engine and do not restart while


the vehicle is raised.


5. Do not allow passengers to remain in the


vehicle.


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, at the opposite end of the vehicle.


When you have a flat tire, use the following as a guide to assist you in the placement of the wheel blocks.


Removing the Spare Tire and Tools


The following information will tell you next how to use the jack and change a tire.


Regular Cab and Crew Cab (Except 1500 Crew Cab)


5-97


Extended Cab


1500 Crew Cab


For regular cab models, the equipment you’ll need is behind the passenger’s seat. For extended and crew cab models, the equipment is on the shelf behind the passenger’s side second row seat. 1. If there is a cover, move the seats forward and turn


the wing nut on the cover counterclockwise to remove it. For crew cab models, pull up the second row seat with the loop at the base of the seat cushion to access the tools.


5-98


2. Turn the knob on the bottle jack counterclockwise


to lower the jack head to release the bottle jack from its holder.


3. Remove the wheel blocks and the wheel block


retainer by turning the wing nut counterclockwise. 4. Remove the wing nut used to retain the storage


bag and tools by turning it counterclockwise.


You’ll use the jack handle extensions and the wheel wrench to remove the underbody-mounted spare tire.


A. Spare Tire (Valve


Stem Pointed Down)


G. Hoist Shaft


Access Hole


B. Hoist Assembly C. Hoist Cable D. Tire Retainer E. Hoist Shaft F. Hoist End of


Extension Tool


H. Wheel Wrench I. Jack Handle


Extensions J. Hoist Lock


(If Equipped)


5-99


1. Open the spare tire lock cover on the bumper and


use the ignition key to remove the lock (if your vehicle is equipped with a hoist lock (J)).


3. Insert the hoist end


(open end) (F) of the extension through the hole (G) in the rear bumper.


2. Assemble the wheel wrench (H) and the two jack


handle extensions (I) as shown.


Be sure the hoist end of the extension connects to the hoist shaft (E). The ribbed square end of the extension is used to lower the spare tire.


5-100


4. Turn the wheel wrench (H) counterclockwise to lower the spare tire to the ground. Continue to turn the wheel wrench until the spare tire can be pulled out from under the vehicle. If the spare tire does not lower to the ground, the secondary latch is engaged causing the tire not to lower. See Secondary Latch System on page 5-110. 5. Use the wheel wrench hook which allows you to pull the hoist cable towards you to assist in reaching the spare tire.


6. Tilt the retainer (D) at


the end of the cable when the tire has been lowered, so it can be pulled up through the wheel opening.


7. Put the spare tire near the flat tire.


5-101


Removing the Flat Tire and Installing the Spare Tire Use the following pictures and instructions to remove the flat tire and raise the vehicle.


1. If your vehicle has


wheel nut caps, loosen them by turning the wheel wrench counterclockwise.


If the vehicle has a center cap with wheel nut caps, the wheel nut caps are designed to stay with the center cap after they are loosened. Remove the entire center cap.


The tools you’ll be using include the bottle jack (A), the wheel blocks (B), the jack handle (C), the jack handle extensions (D), and the wheel wrench (E).


5-102


If the wheel has a smooth center cap, place the chisel end of the wheel wrench in the slot on the wheel, and gently pry out. If the wheel has bolt-on wheel covers, loosen the plastic nut caps by turning the wheel wrench in a counterclockwise direction. If needed, finish loosening them by hand. The nut caps will not come off. Using the flat end of the wheel wrench, pry along the edge of the cover until it comes off.


2. Use and turn the wheel wrench counterclockwise to loosen the wheel nuts. Don’t remove the wheel nuts yet.


If your vehicle has QUADRASTEER™ and


Notice: you use a jack to raise the vehicle without positioning it correctly, you could damage the QUADRASTEER™ system. When raising your vehicle on a jack, avoid contact with tie rods and tie rod boots.


5-103


If you have added a snow plow to the front of your vehicle, lower the snow plow fully before raising the vehicle.


{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.


Jacking Locations


A. Front Location (Two-Wheel-Drive 1500 Series) B. Front Location (All Other Series) C. Rear Location (All Series)


3. Position the jack under the vehicle as shown. If the flat tire is on the front of the vehicle (two-wheel-drive 1500 Series vehicles), position the jack under the bracket attached to the vehicle’s frame, behind the flat tire. If the flat tire is on the front of the vehicle (all other models), position the jack on the frame behind the flat tire. If the flat tire is on the rear, position the jack under the rear axle between the spring anchor and the shock absorber bracket.


5-104


Front Position — 2WD 1500 Series


Front Position — All Other Models


5-105


5. Remove all the wheel nuts and take off the flat tire.


Rear Position


4. Make sure the jack head is positioned so that the rear axle is resting securely between the grooves that are on the jack head. Turn the wheel wrench clockwise to raise the vehicle. Raise the vehicle far enough off the ground so there is enough room for the spare tire to fit under the wheel well.


{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.


5-106


6. Remove any rust or dirt


from the wheel bolts, mounting surfaces and spare wheel.


7. After mounting the


spare, put the wheel nuts back on with the rounded end of the nuts toward the wheel.


{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.


8. Tighten each wheel nut by hand. Then use the wheel wrench to tighten the nuts until the wheel is held against the hub.


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Front Position — All Models


Front Position — 2WD 1500 Series


5-108


Rear Position


9. Turn the wheel wrench counterclockwise to lower


the vehicle. Lower the jack completely.


{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. 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 on page 5-136 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 on page 5-136 for the wheel nut torque specification.


5-109


Secondary Latch System Your vehicle has an underbody-mounted tire hoist assembly equipped with a secondary latch system. It is designed to stop the spare tire from suddenly falling off your vehicle. For the secondary latch to work, the spare must be installed with the valve stem pointing down. See Storing a Flat or Spare Tire and Tools on page 5-114.


{CAUTION:


Before beginning this procedure read all the instructions. Failure to read and follow the instructions could damage the hoist assembly and you and others could get hurt. Read and follow the instructions listed below.


10. Tighten the nuts firmly in a crisscross sequence as


shown by turning the wheel wrench clockwise.


When you reinstall the regular wheel and tire, you must also reinstall either the center cap, or bolt-on hub cap, depending on what your vehicle is equipped with. For center caps, place the cap on the wheel and tap it into place until it seats flush with the wheel. The cap only goes on one way. Be sure to line up the tab on the center cap with the indentation on the wheel. For bolt-on hub caps, align the plastic nut caps with the wheel nuts and then tighten by hand. Then use the wheel wrench to tighten.


5-110


To release the spare tire from the secondary latch, do the following:


4. Repeat this procedure at least two times. If the


spare tire lowers to the ground, continue with Step 5 of Removing the Spare Tire and Tools on page 5-97.


5. Turn the wrench counterclockwise until


approximately 6 inches (15 cm) of cable is exposed. 6. Stand the wheel blocks on their shortest ends, with


the backs facing each other.


1. Check under the vehicle to see if the cable


end is visible. If the cable is not visible proceed to Step 6. 2. If it is visible, first try to tighten the cable by turning the wheel wrench clockwise until you hear two clicks or feel it skip twice. You cannot overtighten the cable.


3. Loosen the cable by turning the wrench


counterclockwise three or four turns.


7. Place the bottom edge


of the jack (A) on the wheel blocks (B), separating them so that the jack is balanced securely.


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8. Attach the jack handle, extension, and wheel


wrench to the jack and place it (with the wheel blocks) under the vehicle towards the front of the rear bumper.


9. Position the center lift point of the jack under the


center of the spare tire.


10. Turn the wrench clockwise to raise the jack until it


lifts the end fitting.


11. Continue raising the jack until the spare tire stops


moving upward and is held firmly in place. The secondary latch has released and the spare tire is balancing on the jack.


12. Lower the jack by turning the wheel wrench


counterclockwise. Keep lowering the jack until the spare tire slides off the jack or is hanging by the cable.


5-112


{CAUTION:


Someone standing too close during the procedure could be injured by the jack. If the spare tire does not slide off the jack completely, make sure no one is behind you or on either side of you as you pull the jack out from the spare.


14. Tilt the retainer (D) at


the end of the cable and pull it through the wheel opening. Pull the tire out from under the vehicle.


13. Disconnect the jack handle from the jack and


carefully remove the jack. Use one hand to push against the spare while firmly pulling the jack out from under the spare tire with the other hand. If the spare tire is hanging from the cable, insert the hoist handle, extension and wheel wrench into the hoist shaft hole in the bumper and turn the wheel wrench counterclockwise to lower the spare the rest of the way.


15. Turn the wheel wrench clockwise to raise the cable


back up if the cable is hanging under the vehicle.


Have the hoist assembly inspected as soon as you can. You will not be able to store a spare or flat tire using the hoist assembly until it has been replaced. To continue changing the flat tire, see Removing the Flat Tire and Installing the Spare Tire on page 5-102.


5-113


Storing a Flat or Spare 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.


Notice: Storing an aluminum wheel with a flat tire under your vehicle for an extended period of time or with the valve stem pointing up may damage the wheel. Always stow the wheel with the valve stem pointing down and have the wheel/tire repaired as soon as possible. Return the bottle jack, wheel blocks, wheel wrench and jack extensions to their location behind the passenger’s seat.


5-114


A. Wing Nut B. Wheel Blocks C. Retaining Bracket and


Wing Nut


D. Wheel Wrench and


Extensions


E. Storage Bag F. Mounting Bracket G. Bottle Jack H. Retaining Hook


Store the tire under the rear of the vehicle in the spare tire carrier. Use the art and text following to assist you:


To store the jack and jack tools, do the following: 1. Put the jack tools in the tool bag and place them in


the retaining bracket.


2. Tighten down the wing nut. 3. Assemble the wheel blocks and bottle jack together


with the wing nut and retaining hook.


4. Position the jack in the mounting bracket. Position the holes in the base of the jack onto the pin in the mounting bracket.


A. Spare Tire (Valve Stem


Pointed Down) B. Hoist Assembly C. Hoist Cable D. Tire Retainer E. Hoist Shaft F. Hoist End of Extension Tool


G. Hoist Shaft


Access Hole


H. Wheel Wrench I. Jack Handle


Extensions J. Hoist Lock


(If Equipped)


5-115


1. Put the tire on the ground at the rear of the vehicle with the valve stem pointed down, and to the rear.


2. Tilt the retainer (D)


downward and through the wheel opening. Make sure the retainer is fully seated across the underside of the wheel.


4. Insert the hoist end (F) through the hole (G) in the rear bumper and into the hoist shaft.


5. Raise the tire part way upward. Make sure the


retainer is seated in the wheel opening.


6. Raise the tire fully against the underside of the vehicle by turning the wheel wrench clockwise until you hear two clicks or feel it skip twice. You cannot overtighten the cable.


3. Attach the wheel wrench (H) and extensions (I)


together.


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Spare Tire Your vehicle, when new, had a fully inflated spare tire. A spare tire may lose air over time, so check its inflation pressure regularly. See Inflation - Tire Pressure on page 5-84 and Loading Your Vehicle on page 4-50
for information regarding proper tire inflation and loading your vehicle. For instruction on how to remove, install or store a spare tire, see Removing the Flat Tire and Installing the Spare Tire on page 5-102 and Storing a Flat or Spare Tire and Tools on page 5-114. After installing the spare tire on your vehicle, you should stop as soon as possible and make sure the spare is correctly inflated. Have the damaged or flat road tire repaired or replaced as soon as you can and installed back onto your vehicle. This way, a spare tire will be available in case you need it again. Your vehicle may have a different size spare tire than the road tires-those originally installed on your vehicle. This spare tire was developed for use on your vehicle, so it is all right to drive on it. If your vehicle has four-wheel drive and the smaller spare is installed, keep the vehicle in two-wheel drive as much as possible. If your vehicle has a spare tire that does not match your vehicle’s original road tires and wheels in size and type, do not include the spare in the tire rotation.


5-117


7. Make sure the tire is stored securely. Push, pull, (A)


and then try to turn (B) the tire. If the tire moves, use the wheel wrench to tighten the cable.


8. Reinstall the spare tire lock (if equipped).


Appearance Care Cleaning products can be hazardous. Some are toxic. Other cleaning products can burst into flames if a match is struck near them or if they get on a hot part of the vehicle. Some are dangerous if their fumes are inhaled in an enclosed space. When anything from a container is used to clean the vehicle, be sure to follow the manufacturer’s warnings and instructions. Always open the doors or windows of the vehicle when cleaning the inside. Never use these to clean the 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 the vehicle, too.


5-118


Do not use any of these products unless this manual says you can. In many uses, these will damage the vehicle: (cid:127) Alcohol


Laundry Soap


(cid:127) Bleach (cid:127) Reducing Agents


Fabric/Carpet 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. GM-approved cleaning products can be obtained from your dealer. 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. To avoid forming a ring on fabric after spot cleaning, clean the entire area immediately or it will set.


(cid:127) (cid:127) (cid:127) (cid:127) Most stains can be removed with club soda water. To clean, use the following instructions: 1. For liquids: blot with a clean, soft, white cloth.


For solids: remove as much as possible and then vacuum or brush.


2. Apply club soda water to a clean, soft, white cloth.


Do not over-saturate; the cloth should not drip water.


3. Clean the entire area. Avoid getting the fabric


too wet.


4. Start cleaning from the seams into the stain


to avoid a ring effect.


5. Continue cleaning, using a clean area of the


cloth each time it becomes soiled.


6. When the stain is removed, blot the cleaned


area with another dry, clean, soft, white cloth.


Using Cleaner on Fabric 1. First, try the cleaner on an area of the fabric that is not easily seen to make sure the cleaner does not affect the color of the fabric.


2. For liquids: blot with a clean, soft, white cloth.


For solids: remove as much as possible and then vacuum or brush.


3. Spray a small amount of the cleaner onto a clean soft, white, cloth. Do not apply spray directly to the fabric.


4. Start cleaning from the seams into the stain to


avoid a ring effect.


5. Continue cleaning, using a clean area of the cloth


each time it becomes soiled.


6. When the stain is removed, blot the cleaned area


with another dry, clean, soft, white cloth.


7. If the cleaner leaves a ring effect, follow up with the


club soda water instructions given earlier in this section.


Special Fabric Cleaning Problems Stains caused by such things as catsup, black coffee, egg, fruit, fruit juice, milk, soft drinks, vomit, urine, and blood can be removed using the club soda water instructions given earlier in this section. 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. Let dry.


5-119


(cid:127) Soiled or stained leather should be cleaned


immediately. If dirt is allowed to work into the finish, it can harm the leather.


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.


Interior Plastic Components Use only a mild soap and water solution on a soft cloth or sponge. Commercial cleaners may affect the surface finish.


Stains caused by oil and grease can be cleaned with an approved GM cleaner and a clean, white cloth. 1. Carefully scrape off excess stain. 2. Clean with cool water and allow to dry completely. 3. If a stain remains, follow the “Using Cleaner on


Fabric” instructions described earlier.


Vinyl Use warm water and a clean cloth. (cid:127) Rub with a clean, damp cloth to remove dirt. This may have to be done more than once. Things like tar, asphalt, and shoe polish will stain if they are not removed quickly. Use a clean cloth and vinyl cleaner. See your dealer for this product.


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.


5-120


(cid:127) (cid:127) 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 5-125. 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


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. During very cold, damp weather frequent application may be required. See Recommended Fluids and Lubricants on page 6-13.


Washing Your Vehicle The paint finish on the vehicle provides beauty, depth of color, gloss retention, and durability. The best way to preserve the vehicle’s finish is to keep it clean by washing it often with lukewarm or cold water. Do not wash the 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. GM-approved cleaning products can be obtained from your dealer. See Vehicle Care/Appearance Materials on page 5-125. 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 the vehicle.


5-121


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 on page 5-121.


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 5-125. If 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. Protecting Exterior Bright Metal Parts Bright metal parts should be cleaned regularly to keep their luster. Washing with water is all that is usually needed. However, you may use chrome polish on chrome or stainless steel trim, if necessary. Use special care with aluminum trim. To avoid damaging protective trim, never use auto or chrome polish, steam or caustic soap to clean aluminum. A coating of wax, rubbed to high polish, is recommended for all bright metal parts.


5-122


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 glass cleaning liquid or powder and water solution. The windshield is clean if beads do not form when it is rinsed 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.


Aluminum or Chrome-Plated Wheels The vehicle may be equipped with either aluminum or chrome-plated wheels. Keep the 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.


If you use strong soaps, chemicals,


Notice: abrasive polishes, cleaners, brushes, or cleaners that contain acid on aluminum or chrome-plated wheels, you could damage the surface of the wheel(s). The repairs would not be covered by your warranty. Use only GM-approved cleaners on aluminum or chrome-plated wheels. 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. Notice: Using chrome polish on aluminum wheels could damage the wheels. The repairs would not be covered by your warranty. Use chrome polish on chrome wheels only. Use chrome polish only on chrome-plated wheels, but avoid any painted surface of the wheel, and buff off immediately after application.


5-123


If you drive your vehicle through an


Notice: automatic car wash that has silicone carbide tire cleaning brushes, you could damage the aluminum or chrome-plated wheels. The repairs would not be covered by your warranty. Never drive a vehicle equipped with aluminum or chrome-plated wheels through an automatic car wash that uses silicone carbide tire cleaning brushes. 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.


Tires To clean the 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 the 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 available from your GM dealer. Larger areas of finish damage can be corrected in your GM dealer’s body and paint shop.


5-124


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 GM 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 the 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.


Vehicle Care/Appearance Materials See your GM dealer for more information on purchasing the following products.


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


Swirl Remover Polish


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 and wipe off. Removes swirl marks, fine scratches, and other light surface contamination.


5-125


Description


Usage


Vehicle Identification


Cleaner Wax


Wash Wax Concentrate


Foaming Tire Shine Low Gloss


Removes light scratches and protects finish. Cleans, shines, and protects in one step. No wiping necessary. Medium foaming shampoo. Cleans and lightly waxes. Biodegradable and phosphate free. Quickly 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 6-13.


Odor Eliminator


Spot Lifter


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.


5-126


Engine Identification The eighth character in your VIN is the engine code. This code will help you identify your engine, specifications and replacement parts.


Service Parts Identification Label You will find this label on the inside of the glove box. It is very helpful if you ever need to order parts. On this label, you will find the following: (cid:127) VIN (cid:127) Model designation (cid:127) Paint information (cid:127) Production options and special equipment Be sure that this label is not removed from the vehicle.


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. Your vehicle has an airbag system. Before attempting to add anything electrical to your vehicle, see Servicing Your Airbag-Equipped Vehicle on page 1-77.


Windshield Wiper Fuses The windshield wiper motor is protected by an internal 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 and not snow, etc., be sure to get it fixed.


5-127


Instrument Panel Fuse Block


The fuse block access door is on the driver’s side edge of the instrument panel. Pull off the cover to access the fuse block.


To remove fuses, hold the end of the fuse between your thumb and index finger and pull straight out. You may have spare fuses located behind the fuse block access door. These can be used to replace a bad fuse. However, make sure it is of the correct amperage.


Power Windows and Other Power Options Circuit breakers 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 or goes away.


Fuses and Circuit Breakers The wiring circuits in your vehicle are protected from short circuits by a combination of fuses, circuit breakers and fusible thermal links. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of the identical size and rating. If you ever have a problem on the road and don’t have a spare fuse, you can borrow one that has the same amperage. Just pick some feature of your vehicle that you can get along without – like the radio or cigarette lighter – and use its fuse, if it is the correct amperage. Replace it as soon as you can.


5-128


Fuses IGN 3


4WD


HTR A/C


LOCK (Relay)


HVAC 1


L DOOR


CRUISE


UNLOCK (Relay)


RR FOG LP BRAKE


DRIVER UNLOCK


IGN 0
TBC IGN 0


Usage Ignition, Heated Seats Four-Wheel Drive System, Auxiliary Battery Climate Control System Power Door Lock Relay (Lock Function) Climate Control System Driver’s Door Harness Connection Cruise Control, Power Take Off (PTO) Power Door Lock Relay (Unlock Function) Not Used Anti-Lock Brake System Power Door Lock Relay (Driver’s Door Unlock Function) TCM Truck Body Controller


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Fuses RR WPR


SEO ACCY


WS WPR


TBC ACCY


Usage Not Used Special Equipment Option Accessory Windshield Wipers Truck Body Controller Accessory


Center Instrument Panel Fuse Block The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column.


Usage Vehicle and Trailer High Mounted Stoplamp Left Turn Signal/Stop Trailer Left Turn Signals and Sidemarkers Vehicle Stoplamps, Brake Module, Electronic Throttle Control Module Right Turn Signal/Stop Trailer Right Turn Signals and Sidemarkers Harness Connector Driver Door Module Not Used Power Door Lock System Not Used Truck Body Controller Flasher Module Left Power Windows Circuit Breaker Truck Body Controller Truck Body Controller


Fuses


VEH CHMSL


LT TRLR ST/TRN


LT TRN


VEH STOP


RT TRLR ST/TRN


RT TRN


BODY DDM AUX PWR 2
LOCKS ECC TBC 2C FLASH


CB LT DOORS


TBC 2B TBC 2A


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Device SEO TRAILER UPFIT


SL RIDE


HDLR 2
BODY DEFOG HDLNR 1
SPARE RELAY


CB SEAT


CB RT DOOR


SPARE


INFO


Usage Special Equipment Option Trailer Brake Wiring Upfitter (Not Used) Ride Control Harness Connection Headliner Wiring Connector Body Wiring Connector Rear Defogger Relay Headliner Wiring Connector 1
Not Used Driver and Passenger Seat Module Circuit Breaker Right Power Windows Circuit Breaker Not Used Infotainment Harness Connection


Underhood Fuse Block


The underhood fuse block in the engine compartment on the driver’s side of the vehicle near the battery. Lift the cover for access to the fuse/relay block. To remove fuses hold the end of the fuse between your thumb and index finger and pull straight out. See Engine Compartment Overview on page 5-14 for more information on its location.


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*1 — Gasoline Engine and Diesel Engine. *2 — Gasoline Engine; ECMRPV — Diesel Engine. *3 — Gasoline Engine; FUEL HT — Diesel Engine. *4 — Gasoline Engine; ECM I — Diesel Engine. *5 — IGN/EDU Fuses


GLOW PLUG


CUST FEED HYBRID


STUD #1


MBEC


BLOWER


LBEC


STUD 2


Usage Diesel Glow Plugs and Intake Air Heater Gasoline Accessory Power Hybrid Auxiliary Power (Single Battery and Diesels Only)/ Dual Battery (TP2) Do not install fuse. Mid Bussed Electrical Center Power Feed, Front Seats, Right Doors Front Climate Control Fan Left Bussed Electrical Center, Door Modules, Door Locks, Auxiliary Power Outlet—Rear Cargo Area and Instrument Panel Accessory Power/Trailer Wiring Brake Feed


Fuses ABS VSES/ECAS IGN A IGN B


LBEC 1


TRL PARK


RR PARK


LR PARK


PARK LP STRTR INTPARK STOP LP


TBC BATT


S/ROOF SEO B2


Usage Anti-Lock Brakes Vehicle Stability Ignition Power Ignition Power

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