2007 Hummer H2 Owners Manual

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B. Drain Plug 1. Remove the ﬁller plug (A). The ﬂuid level should be just below the bottom of the ﬁller plug hole located on the transfer case. To get an accurate reading, the vehicle should be on a level surface. 439 Front Axle When to Check and Change Lubricant It is not necessary to regularly check front axle ﬂuid unless you suspect there is a leak or you hear an unusual noise. A ﬂuid loss could indicate a problem. Have it inspected and repaired. How to Check Lubricant To get an accurate reading, the vehicle should be on a level surface. When the differential is cold, the proper level is from about 1/4 inch (6 mm) to about 3/8 inch (10 mm) below the ﬁller plug hole. What to Use Refer to the Maintenance Schedule to determine what kind of lubricant to use. See Recommended Fluids and Lubricants on page 528. 440 Bulb Replacement For the proper type of replacement bulbs, see Replacement Bulbs on page 446. For any bulb changing procedure not listed in this section, contact your dealer. Halogen Bulbs {CAUTION: Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package. Headlamps To replace a headlamp bulb, do the following: 1. Open the hood. See Hood Release on page 400 for more information. 2. Locate the affected headlamp on the inner front portion of the hood. 3. Turn the bulb/ socket retainer counterclockwise to unlock the bulb/socket. You may prefer to unplug the electrical connector before removing the bulb/socket. If so, complete Step 5 before doing this step. 4. Pull the bulb/socket straight out from the headlamp housing. 441 5. Unplug the electrical connector. Front Turn Signal and Parking Lamps To replace a front turn signal or parking lamp bulb, do the following: 1. Open the hood. See Hood Release on page 400 for more information. 2. Locate the bulb you need to change. 6. Push the new bulb socket into the headlamp assembly making sure to align the splines on the bulb socket with the splines in the headlamp housing. Use care not to touch the bulb with your ﬁngers or hands. 7. Turn the bulb socket retainer clockwise to lock it into place. 8. Plug in the electrical connector. 3. Turn the bulb socket counterclockwise and remove it from the lamp housing. 4. Pull the bulb from the bulb socket. 5. Install the new bulb into the bulb socket. 6. Reinstall the bulb socket into the lamp housing and turn it clockwise until it locks. 442 Daytime Running Lamps (DRL) To replace a daytime running lamp bulb, do the following: 1. Locate the lamp assembly behind the front bumper. It is easiest to come in from the side of the vehicle through the wheel opening. 2. Turn the bulb socket counterclockwise and remove it from the lamp housing. 3. Remove the bulb from the bulb socket. 4. Install the new bulb into the bulb socket. 5. Reinstall the bulb socket into the lamp housing and turn it clockwise until it locks. Roof Marker Lamps Corner Roof Marker Lamps To replace one of these bulbs, do the following: 1. Remove the screw and lift off the lens. 2. Turn the bulb socket counterclockwise to remove it. 3. Remove the bulb. 4. Install a new bulb into the socket. 5. Reinstall the socket into the lens and turn it clockwise to lock it into place. 6. Hook the side of the lens with the hook end into the notch ﬁrst and then tighten the screw. 443 Center Roof Marker Lamps To replace one of these bulbs, do the following: Taillamps, Turn Signal, Stoplamps and Back-up Lamps A. Stoplamp/Taillamp B. Turn Signal Lamp C. Back-Up Lamp 1. Push in on the notch with a ﬂat tool and pull the lamp out. 2. Turn the bulb socket counterclockwise and remove it from the lamp housing. 3. Remove the bulb from the bulb socket. 4. Install a new bulb into the bulb socket. 5. Place the hook end of the lamp in place on one side and push the other end of the lamp down until it locks in place. 444 To replace one of these bulbs, do the following: 1. Open the liftgate or tailgate. See Liftgate (SUV) on page 104 or Tailgate/Spare Tire Carrier on page 108 for more information. 2. If your vehicle is equipped with a taillamp guard, you will need to remove it in order to access the taillamp. To do this, remove the four screws retaining the taillamp guard making sure not to remove the plastic retainers. 3. Remove the two screws from the rear lamp assembly and remove the rear lamp assembly. 5. Pull the bulb straight out from the socket. 6. Press a new bulb into the socket, insert it into the taillamp housing and turn the socket counterclockwise until it is locked in place. 7. Reinstall the rear lamp assembly and tighten the screws. 8. Reinstall the taillamp guard by lining up the guard with the holes in vehicle. Then install and tighten the four screws. 4. Turn the bulb socket counterclockwise to remove it from the taillamp housing. 445 Replacement Bulbs Exterior Lamp Bulb Number Back-up Lamp Daytime Running Lamp (DRL) Front Turn Signal and Parking Lamp Low-Beam and High-Beam Headlamps Rear Taillamp and Stoplamp Rear Taillamp in Bumper Rear Turn Signal Lamp Roof Marker Lamp Center Roof Marker Lamp Corner 3156K 4114K LCP 4157K or 3157KX 9007 3057K 3057K 3156K 168 194 For replacement bulbs not listed here, contact your dealer. Your vehicle may have a taillamp in the bumper. To replace it, do the following: 1. Locate the affected taillamp which is behind and under the bumper. 2. Turn the bulb socket counterclockwise and remove it from the lamp housing. 3. Remove the bulb from the bulb socket. 4. Install the new bulb into the bulb socket. 5. Reinstall the bulb socket into the lamp housing and turn it clockwise to lock it. 446 Windshield Wiper Blade Replacement Windshield wiper blades should be inspected for wear and cracking. See Scheduled Maintenance on page 517 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 530. 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. 447 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. {CAUTION: Poorly maintained and improperly used tires are dangerous. (cid:127) Overloading your vehicle’s 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 362. CAUTION: (Continued) 448 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 vehicle’s tires are cold. See Inﬂation - Tire Pressure on page 456. (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 the tire’s tread is badly worn, or if your vehicle’s tires have been damaged, replace them. Tire Sidewall Labeling 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. 449 (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 462. (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 456 and Loading Your Vehicle on page 362. 450 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 456 and Loading Your Vehicle on page 362. (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 456 and Loading Your Vehicle on page 362. 451 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. 452 (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 percent 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/transaxle, 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 Tire 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 456. 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. GVWR: Gross Vehicle Weight Rating. See Loading Your Vehicle on page 362. GAWR FRT: Gross Axle Weight Rating for the front axle. See Loading Your Vehicle on page 362. GAWR RR: Gross Axle Weight Rating for the rear axle. See Loading Your Vehicle on page 362. 453 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 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 lbs (68 kg). See Loading Your Vehicle on page 362. 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. 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 as shown on the tire placard. See Inﬂation - Tire Pressure on page 456 and Loading Your Vehicle on page 362. 454 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 459. 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 462. 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 362. 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 362. 455 A Tire and Loading Information label is attached to the vehicle’s center pillar (B-pillar), below the driver’s door latch. This label shows your vehicle’s original equipment tires and the correct inﬂation pressures for your tires when they are cold. 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 362. How you load your vehicle affects vehicle handling and ride comfort, never load your vehicle with more weight than it was designed to carry. When to Check Check your tires once a month or more. Also, check the tire pressure of the spare tire. 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: (cid:127) Too much ﬂexing (cid:127) Too much heat (cid:127) 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 456 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 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 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 459 and Wheel Replacement on page 464 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 to tighten the wheel nuts. See Changing a Flat Tire on page 468. 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 517. 457 When rotating your vehicle’s tires, always use one of the correct rotation pattern shown here. The ﬁve-tire rotation pattern includes a full-size spare tire and wheel assembly that matches the regular road tires and wheels in size, type, and brand. 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 362 and Inﬂation - Tire Pressure on page 456, for more information. Make certain that all wheel nuts are properly tightened. See “Wheel Nut Torque” under Capacities and Speciﬁcations on page 512. Four-Tire Rotation Pattern Five-Tire Rotation Pattern 458 {CAUTION: Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel nuts become loose after 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 468. When It Is Time for New Tires One way to tell when it is 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. (cid:127) The tread or sidewall is cracked, cut or snagged deep enough to show cord or fabric. (cid:127) The tire has a bump, bulge, or split. (cid:127) The tire has a puncture, cut, or other damage that cannot be repaired well because of the size or location of the damage. 459 Buying New Tires GM has developed and matched speciﬁc tires for your vehicle. The original equipment tires installed on your vehicle, when it was new, were designed to meet General Motors Tire Performance Criteria Speciﬁcation (TPC spec) system rating. If you need replacement tires, GM strongly recommends that you get tires with the same TPC Spec rating. This way, your vehicle will continue to have tires that are designed to give the same performance and vehicle safety, during normal use, as the original tires. GM’s exclusive TPC Spec system considers over a dozen critical speciﬁcations that impact the overall performance of your vehicle, including brake system performance, ride and handling, traction control, and tire pressure monitoring performance. GM’s TPC Spec number is molded onto the tire’s sidewall by the tire manufacturer. If the tires have an all-season tread design, the TPC spec number will be followed by a MS, for mud and snow. See Tire Sidewall Labeling on page 449 for additional information. 460 {CAUTION: Mixing tires could cause you to lose control while driving. If you mix tires of different sizes, brands, or types (radial and bias-belted tires) the vehicle may not handle properly, and you could have a crash. Using tires of different sizes, brands, or types may also cause damage to your vehicle. Be sure to use the correct size, brand, and type of tires on your vehicle’s wheels. {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. If you must replace your vehicle’s tires with those that do not have a TPC Spec number, make sure they are the same size, load range, speed rating, and construction type (radial and bias-belted tires) as your vehicle’s original tires. Your vehicle’s original equipment tires are listed on the Tire and Loading Information label. This label is attached to the vehicle’s center pillar (B-pillar). See Loading Your Vehicle on page 362, for more information about the Tire and Loading Information label. Different Size Tires and Wheels If you add wheels or tires that are a different size than your original equipment wheels and tires, this may affect the way your vehicle performs, including its braking, ride and handling characteristics, stability, and resistance to rollover. Additionally, if your vehicle has electronic systems such as, anti-lock brakes, traction control, and electronic stability control, the performance of these systems can be affected. {CAUTION: If you add different sized wheels, your vehicle may not provide an acceptable level of performance and safety if tires not recommended for those wheels are selected. You may increase the chance that you will crash and suffer serious injury. Only use GM speciﬁc wheel and tire systems developed for your vehicle, and have them properly installed by a GM certiﬁed technician. See Buying New Tires on page 460 and Accessories and Modiﬁcations on page 392 for additional information. 461 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 (NHTSA), 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 (UTQG) 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. 462 Wheel Alignment and Tire Balance The tires and wheels on your vehicle were aligned and balanced carefully at the factory to give you the longest tire life and best overall performance. Adjustments to wheel alignment and tire balancing will not be necessary on a regular basis. However, if you notice unusual tire wear or your vehicle pulling to one side or the other, the alignment may need to be checked. If you notice your vehicle vibrating when driving on a smooth road, your tires and wheels may need to be rebalanced. See your dealer for proper diagnosis. 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. 463 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 468 for more information. 464 Used Replacement Wheels {CAUTION: Putting a used wheel on your vehicle is dangerous. You cannot know how it has been used or how far it has 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 U-type chains that are the proper size for your tires. Install them on the rear axle 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. 465 Accessory Inﬂator Your vehicle may have an accessory inﬂator system. You can inﬂate things like basketballs and bicycle tires. You can also use it to bring your tire pressure up to the proper pressure. The engine must be running and the gearshift lever must be in PARK (P) for the inﬂator to operate. The accessory inﬂator is located in the rear compartment on the passenger’s side of the vehicle. The accessory inﬂator kit includes a hose and three nozzle adapters. To use the accessory inﬂator, do the following: 1. Attach the appropriate nozzle adapter to the end of the hose. 2. Attach that end of the hose to the object you wish to inﬂate. 3. Remove the dust cover and attach the hose to the outlet. 466 The accessory inﬂator hose also has a built-in air pressure gage. As soon as you start to inﬂate an object it will automatically read the current pressure. 4. Press and release the switch to turn the accessory inﬂator on. The indicator light will remain on while the inﬂator is running. When you are ﬁnished using the inﬂator, press and release the switch to turn it off. Place the inﬂator kit tools and the hose back in the pouch. If your vehicle is equipped with the air suspension system, load leveling will not function with the inﬂator hose attached to the inﬂator outlet. {CAUTION: Inﬂating something too much can make it explode, and you or others could be injured. Be sure to read the inﬂator instructions, and inﬂate any object only to its recommended pressure. 467 If a Tire Goes Flat It is unusual for a tire to blowout while you are driving, especially if you maintain your vehicle’s tires properly. If air goes out of a tire, it is 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 would 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 the jacking equipment to change a ﬂat tire safely. 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. 468 {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 the shift lever in PARK (P). 3. 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 will not 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 example as a guide to assist you in the placement of wheel blocks. The following steps will tell you next how to use the jack and change a tire. 469 Removing the Spare Tire and Tools (SUV) Removing the Tools (SUV) The equipment you need is located under the driver’s side second row seat. To remove the equipment, do the following: 1. Locate the tools by lifting the driver’s side second row seat up to expose the ﬂoor. See 60/40 Split Bench Seat on page 15 for more information. 470 2. Remove the strap from the seat rail. Then carefully slide the tool bag out from under the seat rail as shown. Take care not to pinch the seat cables or electrical harness. 3. Open the tool bag. The following tools needed to remove the spare tire and ﬂat tire are inside the tool bag: Before proceeding, be sure to set the wheel blocks at the appropriate tires as previously shown. To use the wheel blocks, do the following: Remove the wheel blocks from the tool bag. Then, lift the wheel block as shown to lock it into place. A. Jack Handle B. Jack Handle Extensions (2) C. Wheel Wrench D. Wheel Wrench Extension E. Wheel Blocks (2) 471 Removing the Jack (SUV) The jack is stored behind the driver’s side second row seat. 1. Fold the driver’s side second row seat down to access the jack. See 60/40 Split Bench Seat on page 15 for more information. Removing the Spare Tire (SUV) The spare tire is attached to the tire carrier. To remove the spare tire, do the following: 1. Open the tire carrier. See Tailgate/Spare Tire Carrier on page 108 for tire carrier operation. 2. Insert the wheel wrench (A) into the hole (B) and turn it counterclockwise to release it. 3. Grasp and lift the jack out of the bracket. 2. Unscrew the wing nut on the back of the tire carrier. 472 5. Remove the three wheel nuts holding the spare tire onto the tire carrier. 6. Pull off the spare tire and gently lower it to the ground. Set it next to the ﬂat tire. 3. Pull off the license plate holder from the spare tire. 4. Attach the wheel wrench to the wheel wrench extender to remove the wheel nuts. Turn the wheel wrench with the wheel wrench extender counterclockwise to loosen the wheel nuts. 473 Removing the Spare Tire and Tools (SUT) The jack is stored in the rear cargo compartment on the passenger’s side of the vehicle. The tools for the jack are stored under the rear passenger’s seat. To remove the tools, do the following: 1. Locate the tools by lifting the driver’s side second row seat up to expose the ﬂoor. See 60/40 Split Bench Seat on page 15 for more information. 474 2. Remove the strap from the seat rail. Then carefully slide the tool bag out from under the seat rail as shown. Take care to not pinch the seat cables or electrical harnesses. 3. Open the tool bag. You will ﬁnd the following tools needed to remove the spare tire and ﬂat tire: To access the jack, ﬁrst remove the tonneau cover on the rear cargo compartment. See Tonneau Cover (SUT) on page 167 for more information. To remove the cover, unlock it and then pull the cover off. A. Jack Handle B. Jack Handle Extensions (2) C. Wheel Wrench D. Wheel Wrench Extension E. Wheel Blocks 475 Removing the Spare Tire (SUT) The spare tire is attached to the tire carrier. To remove the spare tire, do the following: 1. Open the tire carrier. See Tailgate/Spare Tire Carrier on page 108 for tire carrier operation. Release the jack by inserting the wheel wrench (A) into the hole (B) and turn counterclockwise. Before proceeding, be sure to set the wheel blocks at the appropriate tires as previously shown. Remove the wheel blocks from the tool bag. Then lift the wheel block as shown to lock it into place. 476 2. Unscrew the wing nut on the back of the tire carrier. 6. Remove the three wheel nuts holding the spare tire onto the tire carrier. 7. Pull off the spare tire and gently lower to the ground. Set it next to the ﬂat tire. 3. Pull off the license plate holder from the spare tire. 4. Attach the wheel wrench to the wheel wrench extender to remove the wheel nuts. 5. Turn the wheel wrench with the wheel wrench extender counterclockwise to loosen the wheel nuts. 477 Removing the Flat Tire and Installing the Spare Tire Jack (SUV and SUT) 1. To remove the center cap, place the ﬂat end of the wheel wrench in the slot on the wheel and carefully pry the center cap out. 2. Attach the wheel wrench to the extender. 3. Turn the wheel wrench counterclockwise to loosen the wheel nuts. Do not remove them yet. You will now need to jack the vehicle up using the following instructions. 478 4. Assemble the jack and tools as follows: Front Flat Tire: Attach the jack handle with the hook end connected to the hole on the jack. Slide the wheel wrench onto the jack handle extension. Rear Flat Tire: Assemble the jack together with the jack handle and the jack handle extensions. 5. Turn the wheel wrench clockwise to raise the jack head to the lifting point. 479 Front Flat Tire – Jack Rear Flat Tire – Jack 6. Front Flat Tire: Position the jack under the vehicle on the front lower control arm behind the ﬂat tire. Rear Flat Tire: Place the jack under the curved rear axle pad. Make sure the jack head is positioned so that the rear axle pad is resting securely on the jack head. {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. 480 {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. 7. 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 clear the ground. 8. Remove all the wheel nuts and take off the ﬂat tire. 481 9. 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 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 needed, to get all the rust or dirt off. 482 {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. 10. Install the spare tire. 11. Put the wheel nuts back on with the rounded end of the nuts toward the wheel. 12. Tighten each wheel nut by hand. Then use the wheel wrench to tighten the nuts by turning it clockwise until the wheel is held against the hub. You will not be tightening the nuts fully yet. 13. Lower the vehicle by turning the wheel wrench counterclockwise. Then lower the jack completely. 483 14. Tighten the nuts ﬁrmly in a crisscross sequence as shown by turning the wheel wrench with the wheel wrench extender clockwise. 15. When you install the wheel and tire, you must also reinstall the center cap. Place the cap on the wheel and tap it into place until it sits ﬂush with the wheel. {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 512 for wheel nut torque speciﬁcation. Improperly tightened wheel nuts can Notice: lead to brake pulsation and rotor damage. To avoid expensive brake repairs, evenly tighten the wheel nuts in the proper sequence and to the proper torque speciﬁcation. See Capacities and Speciﬁcations on page 512 for the wheel nut torque speciﬁcation. 484 Storing a Flat or Spare Tire and Tools (SUV) Storing the Flat or Spare Tire Use the following art and text to help store the spare or ﬂat tire back into its proper location when done changing a tire. To store the ﬂat or spare tire on the tire carrier, do the following: 1. Close the tire carrier. See Tailgate/Spare Tire Carrier on page 108 for tire carrier operation. 2. Place the ﬂat or spare tire onto the tire carrier with the outside of the wheel facing out. 3. Reinstall the three nuts holding the spare or the ﬂat tire to the tire carrier. Tighten the nuts by hand. 4. Use the wheel wrench and wheel wrench extension to tighten the nuts ﬁrmly. 5. Try to move the tire back and forth slightly to make sure it is secure. 485 Storing the Jack and Tools Follow these instructions to store the jack and tools: 1. Lower the jack completely. 2. Place the jack in the mounting bracket. 6. Slide the license plate holder onto the spare or ﬂat tire. Secure it from the back of the tire carrier with the wing nut. If you choose not to reinstall the spare or ﬂat tire on the vehicle, you still need to reinstall the license plate holder on the spare tire carrier. 3. Turn the hole at the top of the jack clockwise until the jack is held tight in the mounting bracket. 486 4. Push and pull on the jack and retighten if necessary to make sure the jack is secure. 5. Place the wheel blocks in the tool bag. 6. Place the remaining tools in the tool bag. 7. Make sure nothing is located under or in front of the seat and then lift the rear driver’s seat so that the ﬂoor is exposed. See 60/40 Split Bench Seat on page 15 for more information. 8. Place the narrow end of the tool bag under the seat rails as shown and slide the tool bag under the rear seat. Be careful not to pinch the seat cables or electrical harnesses. 9. Reinstall the strap to the seat rail for the tool bag. Wrap the strap around the seat rail and then secure it to the tool bag. 10. Return the seat to the correct position. See 60/40 Split Bench Seat on page 15 for more information. 487 Storing a Flat or Spare Tire and Tools (SUT) Storing the Flat or Spare Tire Use the following art and text to help you store the spare or ﬂat tire back into its proper location when you are done. To store the ﬂat or spare tire on the tire carrier, do the following: 1. Close the tire carrier. See Tailgate/Spare Tire Carrier on page 108 for tire carrier operation. 2. Place the ﬂat or spare tire onto the tire carrier with the outside of the wheel facing you. 3. Reinstall the three nuts holding spare or ﬂat tire to the tire carrier. Tighten the nuts by hand. 488 4. Use the wheel wrench and the wheel wrench extension to tighten the nuts ﬁrmly. Try to move the tire back and forth slightly to be sure it is secure. Storing the Jack and Tools Follow these instructions to store the jack and tools: 1. Lower the jack completely. 2. Place the jack in the mounting bracket. 5. Slide the license plate holder onto the spare or ﬂat tire. Secure it from the back of the tire carrier with the wing nut. If you choose not to reinstall the spare or ﬂat tire on the vehicle, you will still need to reinstall the license plate holder on the spare tire carrier. 3. Turn the hole at the top of the jack clockwise until the jack is held tight in the mounting bracket. 489 4. Push and pull on the jack and retighten if necessary to make sure the jack is secure. 5. Place the wheel blocks in the tool bag. 6. Place the remaining tools in the tool bag. 7. Make sure nothing is located under or in front of the seat and then lift the rear driver’s seat so that the ﬂoor is exposed. See 60/40 Split Bench Seat on page 15 for more information. 490 8. Place the narrow end of the tool bag under the seat rails as shown. Slide the tool bag under the rear seat. Be careful not to pinch the seat cables or electrical harnesses. 9. Reinstall the strap to the seat rail. 10. Return the seat to the correct position. 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 456 and Loading Your Vehicle on page 362 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 478 and Storing a Flat or Spare Tire and Tools (SUV) on page 485 or Storing a Flat or Spare Tire and Tools (SUT) on page 488. 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. Do not mix tires and wheels of different sizes, because they will not ﬁt. Keep your spare tire and its wheel together. Appearance Care Cleaning the Inside of Your Vehicle Your vehicle’s interior will continue to look its best if it is cleaned often. Although not always visible, dust and dirt can accumulate on your upholstery. Dirt can damage carpet, fabric, leather, and plastic surfaces. Regular vacuuming is recommended to remove particles from your upholstery. It is important to keep your upholstery from becoming and remaining heavily soiled. Soils should be removed as quickly as possible. Your vehicle’s interior may experience extremes of heat that could cause stains to set rapidly. Lighter colored interiors may require more frequent cleaning. Use care because newspapers and garments that transfer color to your home furnishings may also transfer color to your vehicle’s interior. 491 If you use abrasive cleaners when When cleaning your vehicle’s interior, only use cleaners speciﬁcally designed for the surfaces being cleaned. Permanent damage may result from using cleaners on surfaces for which they were not intended.Use glass cleaner only on glass. Remove any accidental over-spray from other surfaces immediately. To prevent over-spray, apply cleaner directly to the cleaning cloth. Notice: cleaning glass surfaces on your vehicle, you could scratch the glass and/or cause damage to the rear window defogger. When cleaning the glass on your vehicle, use only a soft cloth and glass cleaner. Many cleaners contain solvents that may become concentrated in your vehicle’s breathing space. Before using cleaners, read and adhere to all safety instructions on the label. While cleaning your vehicle’s interior, maintain adequate ventilation by opening your vehicle’s doors and windows. Dust may be removed from small buttons and knobs using a small brush with soft bristles. Your dealer has a product for cleaning your vehicle’s glass. Should it become necessary, you can also obtain a product from your dealer to remove odors from your vehicle’s upholstery. 492 Do not clean your vehicle using the following cleaners or techniques: (cid:127) Never use a knife or any other sharp object to remove a soil from any interior surface. (cid:127) Never use a stiff brush. It can cause damage to your vehicle’s interior surfaces. (cid:127) Never apply heavy pressure or rub aggressively with a cleaning cloth. Use of heavy pressure can damage your interior and does not improve the effectiveness of soil removal. (cid:127) Use only mild, neutral-pH soaps. Avoid laundry detergents or dishwashing soaps with degreasers. Using too much soap will leave a residue that leaves streaks and attracts dirt. For liquid cleaners, about 20 drops per gallon (3.78 L) of water is a good guide. (cid:127) Do not heavily saturate your upholstery while cleaning. (cid:127) Damage to your vehicle’s interior may result from the use of many organic solvents such as naptha, alcohol, etc. Fabric/Carpet Use a vacuum cleaner with a soft brush attachment frequently to remove dust and loose dirt. A canister vacuum with a beater bar in the nozzle may only be used on ﬂoor carpet and carpeted ﬂoor mats. For soils, always try to remove them ﬁrst with plain water or club soda. Before cleaning, gently remove as much of the soil as possible using one of the following techniques: (cid:127) For liquids: gently blot the remaining soil with a paper towel. Allow the soil to absorb into the paper towel until no more can be removed. (cid:127) For solid dry soils: remove as much as possible and then vacuum. To clean, use the following instructions: 1. Saturate a lint-free, clean white cloth with water or club soda. 2. Wring the cloth to remove excess moisture. 3. Start on the outside edge of the soil and gently rub toward the center. Continue cleaning, using a clean area of the cloth each time it becomes soiled. 4. Continue to gently rub the soiled area until the cleaning cloth remains clean. 5. If the soil is not completely removed, use a mild soap solution and repeat the cleaning process that was used with plain water. If any of the soil remains, a commercial fabric cleaner or spot lifter may be necessary. When a commercial upholstery cleaner or spot lifter is to be used, test a small hidden area for colorfastness ﬁrst. If the locally cleaned area gives any impression that a ring formation may result, clean the entire surface. After the cleaning process has been completed, a paper towel can be used to blot excess moisture from the fabric or carpet. 493 Leather A soft cloth dampened with water may be used to remove dust. If a more thorough cleaning is necessary, a soft cloth dampened with a mild soap solution can be used. Allow the leather to dry naturally. Do not use heat to dry. Never use steam to clean leather. Never use spot lifters or spot removers on leather. Many commercial leather cleaners and coatings that are sold to preserve and protect leather may permanently change the appearance and feel of your leather and are not recommended. Do not use silicone or wax-based products, or those containing organic solvents to clean your vehicle’s interior because they can alter the appearance by increasing the gloss in a non-uniform manner. Never use shoe polish on your leather. Instrument Panel, Vinyl, and Other Plastic Surfaces A soft cloth dampened with water may be used to remove dust. If a more thorough cleaning is necessary, a clean soft cloth dampened with a mild soap solution can be used to gently remove dust and dirt. Never use spot lifters or removers on plastic surfaces. Many commercial cleaners and coatings that are sold to preserve and protect soft plastic surfaces may permanently change the appearance and feel of your interior and are not recommended. Do not use silicone or wax-based products, or those containing organic solvents to clean your vehicle’s interior because they can alter the appearance by increasing the gloss in a non-uniform manner. Some commercial products may increase gloss on your instrument panel. The increase in gloss may cause annoying reﬂections in the windshield and even make it difficult to see through the windshield under certain conditions. 494 Wood Panels Use a clean cloth moistened in warm, soapy water (use mild dish washing soap). Dry the wood immediately with a clean cloth. Speaker Covers Vacuum around a speaker cover gently, so that the speaker will not be damaged. Clean spots with just water and mild soap. 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 528. 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. 495 GM-approved cleaning products can be obtained from your dealer. See Vehicle Care/Appearance Materials on page 501. 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. The overall height, width, and underbody clearances of the HUMMER H2 are similar to current General Motors’ full-size light duty trucks. This means a HUMMER H2 should ﬁt in a standard car wash. But, if your vehicle has added accessories like roof-mounted lamps or a roof basket, it might not ﬁt properly in a standard car wash. If you drive your vehicle through an Notice: Certain add-on accessories can change the dimensions of your vehicle. If you’ve added items to the outside of your vehicle, it might not ﬁt properly in a standard car wash. Your vehicle and the car wash could be damaged. To help prevent damage, know how accessories have changed the dimensions of your vehicle and check with the car wash manager before entering a car wash. Notice: automatic car wash that does not have enough clearance for any roof-mounted accessories (such as off-road lamps or a roof basket) on your vehicle, you can damage your vehicle. To avoid damaging your vehicle in a car wash, remove any roof-mounted accessories if you can, and do not use an automatic car wash while roof-mounted accessories are on your vehicle. See Power Winch Platform on page 361 and Off-Road Lamps on page 190 for more information. Also see Luggage Carrier on page 160 for more information. 496 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 495. Finish Care Occasional waxing or mild polishing of the vehicle by hand may be necessary to remove residue from the paint ﬁnish. Approved cleaning products can be obtained from your dealer. See Vehicle Care/Appearance Materials on page 501. 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. The 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. 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 the 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. To help keep the paint ﬁnish looking new, keep the vehicle in a garage or covered whenever possible. 497 Windshield, Backglass, 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. 498 If you use strong soaps, chemicals, Aluminum Wheels 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. 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. 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. The surface of these wheels is similar to the painted surface of the vehicle. Do not use strong soaps, chemicals, abrasive polishes, abrasive cleaners, cleaners with acid, or abrasive cleaning brushes on them because the surface could be damaged. Do not use chrome polish on aluminum wheels. Notice: If you drive your vehicle through an 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 the 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 dealer. Larger areas of ﬁnish damage can be corrected in your dealer’s body and paint shop. 499 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 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. 500 Vehicle Care/Appearance Materials Description Usage Description Usage Swirl Remover Polish 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 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. 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. 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 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. 501 Vehicle Identiﬁcation Vehicle Identiﬁcation Number (VIN) Engine Identiﬁcation The eighth character in the VIN is the engine code. This code will help you identify your vehicle’s 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 Do not remove this label from the vehicle. 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 Certiﬁcation/Tire and Service Parts labels and the certiﬁcates of title and registration. 502 Electrical System Add-On Electrical Equipment Notice: Do not add anything electrical to your vehicle unless you check with your dealer ﬁrst. Some electrical equipment can damage your vehicle and the damage would not be covered by your warranty. Some add-on electrical equipment can keep other components from working as they should. Add-on equipment can drain your vehicle’s battery, even if your vehicle is not operating. Your vehicle has an airbag system. Before attempting to add anything electrical to your vehicle, see Servicing Your Airbag-Equipped Vehicle on page 88. 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. 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. 503 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. Instrument Panel Fuse Block The fuse block access door is located on the driver’s side edge of the instrument panel. Pull off the cover to access the fuse block. To remove fuses if you don’t have a fuse extractor, 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. 504 Fuses Usage 4WD HTR A/C LOCK HVAC 1 L DOOR CRUISE UNLOCK RR FOG LP BRAKE DRIVER UNLOCK IGN 0 TBC IGN 0 VEH CHMSL LT TRLR ST/TRN Four-Wheel Drive Switch, Air Suspension Switch/Module Not Used Power Door Lock Relay (Lock Function) Inside Rearview Mirror, Climate Control System Driver’s Door Harness Connection Cruise Control Power Door Lock Relay (Unlock Function) Not Used Brake Switch Power Door Lock Relay (Driver’s Door Unlock Function) Brake Transmission Shift Interlock, Powertrain Control Module, Transmission Truck Body Controller Vehicle and Trailer High Mounted Stoplamp Left Turn Signal/Stop Trailer 505 Fuses Usage RR Wiper SEO ACCY WS WPR TBC ACCY IGN 3 Rear Window Wiper Switch Special Equipment Option Accessory Windshield Wipers Truck Body Controller Accessory Rear Heated Seats Module Fuses Usage LT TRN VEH STOP RT TRLR ST/TRN RT TRN BODY DDM LOCKS ECC TBC 2C FLASH CB LT DOORS TBC 2B TBC 2A 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 Rear Doors and Liftgate Power Lock Relay Feed Liftgate Truck Body Controller Flasher Module Left Rear Power Window Circuit Breaker and Driver Door Module Truck Body Controller Truck Body Controller Circuit Breaker AUX PWR 2 Usage Midgate Controller (SUT Only)

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2007 Hummer H2 Owners Manual