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Driver Side Lock Retain Accessory Power 2
Accessory Blower Spare Daytime Running Lamps Fuel PumpTo open the fuse block cover, remove the clip on cover. Notice: Spilling liquid on any electrical components on your vehicle may damage it. Always keep the covers on any electrical component.
Fuses
Usage
F15
F16
F17
F18
F19
F20
F21
F22
F23
F24
FUSEPULLER
Outside Rearview Mirrors Sunroof/Automatic Transmission Shift Lock Sunroof Automatic Occupant Sensor Driver Side Heated Seat Passenger Side Heated Seat Daytime Running Lamps Front Cigarette Lighter Steering Wheel Controls Backlighting Power Window
Fuse Puller
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Vehicle Service and Care
Engine Compartment Fuse Block - Fuse Puller Shown
Fuses FL1
FL2
FL3
FL4
FL5
FL6
FL7
FL8
FL9FL10
FL11
FL12
F1
F2
F3
F4
F5
F6
F8F9
Usage
Spare Rear Defog ABS Motor Battery Main 3
Battery Main 1
Spare Battery Main 2
Starter HVAC Blower Motor Fan 1 Engine Cooling (Right) Spare Fan 2 Engine Cooling (Left) Comm Enable HVAC Battery Back-up Lamp Fog Lamps (Front) ABS Valves Spare Horn Transmission Control Module2008 - Pontiac G8 Owner Manual
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Fuses F25
F26
F27F28
F29
F30
F31
F32
F33
F34
F35
F36
F37F38
F39
F40
F41F42
Usage
Reverse Lockout Spare Spare Engine Control Module 1
Even Coils/Injectors Spare Spare Emission 2
Emission 1
Spare Odd Coils/Injectors Spare HVAC Ignition Heated Seats/OnStar® Ignition Engine Ignition Airbags Spare Passenger Side Park LampFuses
F43
FUSE
PULLER
Usage
Driver Side Park Lamp
Fuse Puller
Relays
Usage
R1
R2
R3
R4
R5R6
R7
R8R9
R10
R11
R12
R13
R14Spare Comm Enable Spare Back-up Lamps Fog Lamp Low-Beam Headlamps Spare Defogger Windshield Wiper High Windshield Wiper Low High-Beam Headlamps Crank Powertrain Ignition Main
Fuses
Usage
F10
F11
F12
F13
F14
F15
F16
F17
F18F19
F20
F21F22
F23
F24
Driver Side Low-Beam Headlamp Spare Passenger Side Low-Beam Headlamp Spare Spare Front Wiper Spare Theft Horn Spare Passenger Side High-Beam Headlamp Spare Windshield Washer Canister Vent Solenoid Driver Side High-Beam Headlamp Spare
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Vehicle Service and Care
Relays
Usage
R15
R16R17
R18
R19
R20
Windshield Wiper Horn Fan 1 (Engine Cooling) Parking Lamps Fan 2 (Engine Cooling) Fan 3 (Engine Cooling)
Rear Compartment Fuse Block
The rear compartment fuse block is located on the left side of the trunk behind a cover.
Use the fuse puller, to remove and replace fuses.
Fuses
Usage
F1
F2
F3
F4F5
F6
F7Spare Ampliï¬er XM Radioâ„¢ Radio Instrument/Display/ Remote Function Actuator/Data Link Connection Spare Spare
Fuses
Usage
F8
F9
F10F11
F12
OnStarâ„¢ Spare ECM Battery Regulated Voltage Control Sensor Fuel Pump
Relays
R1
R2Usage Spare Spare
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{ CAUTION Poorly maintained and improperly used tires are dangerous. (cid:129) Overloading your vehicle’s
tires can cause overheating as a result of too much flexing. You could have an air-out and a serious accident. See Loading the Vehicle on page 8-28.
(cid:129) 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.
(Continued)
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 vehicle Warranty booklet for details.
2008 - Pontiac G8 Owner Manual
CAUTION (Continued)
Tire pressure should be checked when your vehicle’s tires are cold. See Inflation - Tire Pressure on page 9-46.
(cid:129) 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:129) 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.
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Vehicle Service and Care
Tire Sidewall Labeling Useful information about a tire is molded into its sidewall. The examples show a typical passenger vehicle tire and a compact spare tire sidewall.
Passenger (P-Metric) Tire
Example
(A) Tire Size: The tire size is a combination of letters and numbers used to deï¬ne 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 Speciï¬cation): Original equipment tires designed to GM’s speciï¬c tire performance criteria have a TPC speciï¬cation code molded onto the sidewall. GM’s TPC speciï¬cations 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 Identiï¬cation Number (TIN): The letters and numbers following DOT (Department of Transportation) code is the Tire Identiï¬cation 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 9-59. (G) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load.
2008 - Pontiac G8 Owner Manual
Compact Spare Tire Example
(A) Temporary Use Only: The compact spare tire or temporary use tire has a tread life of approximately 3,000 miles (5 000 km) and should not be driven at speeds over 65 mph (105 km/h). The compact spare tire is for emergency use when a regular road tire has lost air and gone flat. If your vehicle has a compact spare tire. See Compact Spare Tire on page 9-79 and If a Tire Goes Flat on page 9-62.
(B) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. (C) Tire Identiï¬cation Number (TIN): The letters and numbers following the DOT (Department of Transportation) code is the Tire Identiï¬cation Number (TIN). The TIN shows the manufacturer and plant code, tire size, and date the tire was manufactured. The TIN is molded onto both sides of the tire, although only one side may have the date of manufacture. (D) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load.
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(E) Tire Inflation: The temporary use tire or compact spare tire should be inflated to 60 psi (420 kPa). For more information on tire pressure and inflation see Inflation - Tire Pressure on page 9-46. (F) Tire Size : A combination of letters and numbers deï¬ne a tire’s width, height, aspect ratio, construction type, and service description. The letter T as the ï¬rst character in the tire size means the tire is for temporary use only. (G) TPC Spec (Tire Performance Criteria Speciï¬cation): Original equipment tires designed to GM’s speciï¬c tire performance criteria have a TPC speciï¬cation code molded onto the sidewall. GM’s TPC speciï¬cations meet or exceed all federal safety guidelines.
Tire Size The following illustration shows an example of a typical passenger vehicle tire size.
(A) Passenger (P-Metric) Tire: The United States version of a metric tire sizing system. The letter P as the ï¬rst character in the tire size means a passenger vehicle 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 60, as shown in item C of the illustration, it would mean that the tire’s sidewall is 60 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: These characters represent the load range and speed rating of the tire. The load index represents the load carry capacity a tire is certiï¬ed to carry. The load index can range from 1 to 279. The speed rating is the maximum speed a tire is certiï¬ed to carry a load. Speed ratings range from A to Z.
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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 9-46. Curb Weight: 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 Identiï¬cation 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 the Vehicle on page 8-28. GAWR FRT: Gross Axle Weight Rating for the front axle. See Loading the Vehicle on page 8-28.
Tire Terminology and Deï¬nitions 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.
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GAWR RR: Gross Axle Weight Rating for the rear axle. See Loading the Vehicle on page 8-28. 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 can 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 the Vehicle on page 8-28. 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 9-46 and Loading the Vehicle on page 8-28.
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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 9-56. 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 9-59. Vehicle Capacity Weight: The number of designated seating positions multiplied by 150 lbs (68 kg) plus the rated cargo load. See Loading the Vehicle on page 8-28.
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 the Vehicle on page 8-28.
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Vehicle Service and Care
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:129) Too much flexing (cid:129) Too much heat (cid:129) Tire overloading (cid:129) Premature or irregular wear (cid:129) Poor handling (cid:129) Reduced fuel economy
If your tires have too much air (over-inflation), you can get the following: (cid:129) Unusual wear (cid:129) Poor handling (cid:129) Rough ride (cid:129) Needless damage from road
hazards
A vehicle speciï¬c Tire and Loading Information label is attached to the vehicle’s center pillar, below the driver’s door latch. This label lists the vehicle’s original equipment tires and the recommended cold tire inflation pressure for the 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 more information regarding how much weight your vehicle can carry, see Loading the Vehicle on page 8-28. How you load your vehicle affects vehicle handling and ride comfort. When driving with less than the maximum load capacity allowed for your vehicle, you can set tire inflation pressure to the recommended amounts shown in the following chart. Never load your vehicle with more weight than it was designed to carry.
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Recommended Cold Tire Inflation
Tire Size
Occupant and Cargo Weight:
573 lbs (260 kg) or Less
Occupant and Cargo Weight:
Up to 917 lbs (416 kg)
(Vehicle Capacity Weight)
P245/45R18 96V 245/45R18 96V 245/40R19 94W T155/80R17 111M (Compact Spare)
Front Tires
33 psi (230 kPa) 36 psi (250 kPa) 36 psi (250 kPa)
Rear Tires
33 psi (230 kPa) 36 psi (250 kPa) 36 psi (250 kPa )
Front Tires
36 psi (250 kPa) 36 psi (250 kPa) 36 psi (250 kPa)
Rear Tires
39 psi (270 kPa) 39 psi (270 kPa) 39 psi (270 kPa)
60 psi (420 kPa)
60 psi (420 kPa)
60 psi (420 kPa)
60 psi (420 kPa)
When to Check Check your tires once a month or more. Do not forget the compact spare tire, if your vehicle has one. It should be at 60 psi (420 kPa). For more information about the vehicle’s compact spare tire, see Compact Spare Tire on page 9-79.
How to Check Use a good quality pocket-type gage to check tire pressure. You can’t tell if your tires are properly inflated simply by looking at them. Radial tires may look properly inflated even when they’re underinflated. Check the tire’s inflation pressure when the tires are cold. Cold means your vehicle has been sitting for at least three hours or driven no more than 1 mile (1.6 km).
Remove the valve cap from the tire valve stem. Press the tire gage ï¬rmly 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.
2008 - Pontiac G8 Owner Manual
Vehicles with P245/45R18 96V, 245/45R18 96V, or 245/40R19 94W size tires, require inflation pressure adjustment when driving the vehicle at speeds of 100 mph (160 km/h) or higher. Use the following chart to determine the cold tire inflation pressure when operating the vehicle under high-speed conditions.
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Vehicle Service and Care
If you overï¬ll 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.
High-Speed Operation
{ CAUTION Driving at high speeds, 100 mph (160 km/h) or higher, puts an additional strain on tires. Sustained high-speed driving causes excessive heat build up and can cause sudden tire failure. You could have a crash and you or others could be killed. Some high-speed rated tires require inflation pressure adjustment for high speed operation. When speed limits and road conditions are such that a vehicle can be driven at high speeds, make sure the tires are rated for high speed operation, in excellent condition, and set to the correct cold tire inflation pressure for the vehicle load.
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Recommended Cold Tire Inflation
Tire Size
Occupant and Cargo Weight:
573 lbs (260 kg) or Less
Occupant and Cargo Weight:
Up to 917 lbs (416 kg)
(Vehicle Capacity Weight)
P245/45R18 96V 245/45R18 96V 245/40R19 94W
Front Tires
35 psi (240 kPa) 36 psi (250 kPa) 36 psi (250 kPa)
Rear Tires
35 psi (240 kPa) 36 psi (250 kPa) 36 psi (250 kPa)
Front Tires
39 psi (270 kPa) 39 psi (270 kPa) 39 psi (270 kPa)
Rear Tires
44 psi (300 kPa) 44 psi (300 kPa) 44 psi (300 kPa)
When you end this high-speed driving, return the tires to the cold tire inflation pressure shown on the Tire and Loading Information label. See Loading the Vehicle on page 8-28
and Inflation - Tire Pressure on page 9-46.Tire Pressure Monitor System The Tire Pressure Monitor System (TPMS) uses radio and sensor technology to check tire pressure levels. The TPMS sensors monitor the air pressure in your vehicle’s tires and transmit tire pressure readings to a receiver located in the vehicle. Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire inflation
pressure label. (If your vehicle has tires of a different size than the size indicated on the vehicle placard or tire inflation pressure label, you should determine the proper tire inflation pressure for those tires.) As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires is signiï¬cantly under-inflated.
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Vehicle Service and Care
Accordingly, when the low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a signiï¬cantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle’s handling and stopping ability. Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driver’s responsibility to maintain correct tire pressure, even if under-inflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale. Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when the system is not operating properly. The TPMS malfunction indicator is combined with the low tire pressure telltale. When the system detects a malfunction, the telltale
will flash for approximately one minute and then remain continuously illuminated. This sequence will continue upon subsequent vehicle start-ups as long as the malfunction exists. When the malfunction indicator is illuminated, the system may not be able to detect or signal low tire pressure as intended. TPMS malfunctions may occur for a variety of reasons, including the installation of replacement or alternate tires or wheels on the vehicle that prevent the TPMS from functioning properly. Always check the TPMS malfunction telltale after replacing one or more tires or wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to continue to function properly. See Tire Pressure Monitor Operation on page 9-51 for additional information.
Federal Communications Commission (FCC) and Industry and Science Canada The Tire Pressure Monitor System (TPMS) operates on a radio frequency and complies with Part 15
of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not causeharmful interference.
2. This device must accept any
interference received, including interference that may cause undesired operation.
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Tire Pressure Monitor Operation The Tire Pressure Monitor System (TPMS) is designed to warn the driver when a low tire pressure condition exists. TPMS sensors are mounted onto each tire and wheel assembly, excluding the spare tire and wheel assembly. The TPMS sensors monitor the air pressure in the vehicle’s tires and transmit the tire pressure readings to a receiver located in the vehicle. When a low tire pressure condition is detected, the TPMS turns on the 7
low tire pressure warning light. At the same time a message to check the pressure in a speciï¬c tire appears on the Driver Information Center (DIC) display. The low tire pressure warning light and the DIC warning message come on at each ignition cycle until the tires are inflated to the correct inflation pressure. Using the DIC, tire pressure levels can be viewed bythe driver. For additional information and details about the DIC operation and displays see DIC Operation and Displays on page 4-23 and DIC Warnings and Messages on page 4-27. The low tire pressure warning light may come on in cool weather when the vehicle is ï¬rst started, and then turn off as you start to drive. This could be an early indicator that the air pressure in the tire(s) are getting low and need to be inflated to the proper pressure. A Tire and Loading Information label shows the size of the vehicle’s original equipment tires and the correct inflation pressure for the vehicle’s tires when they are cold. See Loading the Vehicle on page 8-28, for an example of the Tire and Loading Information label and its location on the vehicle. Also see Inflation - Tire Pressure on page 9-46.
The TPMS operates on a radio frequency and complies with RSS-210 of Industry and Science Canada. Operation is subject to the following two conditions: 1. This device may not cause
interference.
2. This device must accept any
interference received, including interference that may cause undesired operation of the device.
Changes or modiï¬cations to this system by other than an authorized service facility could void authorization to use this equipment.
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Vehicle Service and Care
The vehicle’s TPMS system can warn about a low tire pressure condition but it does not replace normal tire maintenance. See Tire Inspection and Rotation on page 9-54 and Tires on page 9-39. Notice: Using non-approved tire sealants could damage the Tire Pressure Monitor System (TPMS) sensors. TPMS sensor damage caused by using an incorrect tire sealant is not covered by the vehicle warranty. Always use the GM approved tire sealant available through your dealer/retailer. TPMS Malfunction Light and Message The TPMS will not function properly if one or more of the TPMS sensors are missing or not operating. When the system detects a malfunction, the 7 low tire warning light flashes for about one minute and then stays on for the remainder
of the ignition cycle. A DIC warning message also displays. The low tire warning light and DIC warning message come on at each ignition cycle until the problem is corrected. Some of the conditions that can cause the malfunction light and DIC message to come on are: (cid:129) One of the road tires has been
replaced with the spare tire. The spare tire does not have a TPMS sensor. The TPMS malfunction light and DIC message should go off once the road tire containing the TPMS sensor is re-installed.
(cid:129) The TPMS sensor matching process was started but not completed or not completed successfully after installing replacement tires or rotating the vehicle’s tires. The DIC message and TPMS malfunction light should go off once the TPMS sensor matching process is performed successfully.
(cid:129) One or more TPMS sensors are
missing or damaged. The DIC message and the TPMS malfunction light should go off when the TPMS sensors are installed and the sensor matching process is performed successfully. See the dealer/ retailer for service.
(cid:129) Replacement tires or wheels do not match the vehicle’s original equipment tires or wheels. Tires and wheels other than those recommended for the vehicle could prevent the TPMS from functioning properly. See Buying New Tires on page 9-56.
(cid:129) Operating electronic devices or being near facilities using radio wave frequencies similar to the TPMS could cause the TPMS sensors to malfunction.
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The TPMS sensors can also be matched to each tire/wheel position by increasing or decreasing the tire’s air pressure. When increasing the tire’s pressure, do not exceed the maximum inflation pressure indicated on the tire’s sidewall. To decrease the tire’s air-pressure use the pointed end of the valve cap, a pencil-style air pressure gage, or a key. You have two minutes to match each tire and wheel position. If it takes longer than two minutes to match any tire and wheel position, the matching process stops and you need to start over.
If the TPMS is not functioning it cannot detect or signal a low tire condition. See the dealer/retailer for service if the TPMS malfunction light and DIC message comes on and stays on. TPMS Sensor Matching Process Each TPMS sensor has a unique identiï¬cation code. Any time one or more of the TPMS sensors are replaced or the vehicle’s tires are rotated, the identiï¬cation codes need to be matched to the new tire/wheel location. The sensors are matched, to the tire/wheel locations, in the following order: driver side front tire, passenger side front tire, passenger side rear tire, and driver side rear tire using a TPMS diagnostic tool. See your dealer/retailer for service.
The TPMS matching process is outlined below: 1. Set the parking brake. 2. Turn the ignition switch to
ON/RUN with the engine off.
3. Press and hold the Remote
Keyless Entry (RKE) transmitter’s lock and unlock buttons, at the same time, for about ï¬ve seconds to start the TPMS learn mode. The horn chirps two times indicating the TPMS receiver is ready and in learn mode.
4. Start with the driver side front
tire. The driver side front indicator lamp also comes on to indicate that corner’s sensor is ready to be learned.
5. Remove the valve cap from the
tire’s valve stem. Activate the TPMS sensor by increasing or decreasing the tire’s air pressure for about eight seconds. The horn chirps one time to conï¬rm the sensor identiï¬cation code has been matched to the tire/wheel position.
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Vehicle Service and Care
6. The driver side front indicator
lamp turns off and the passenger side front indicator lamp comes on to indicate that corner’s sensor is ready to be learned. Proceed to the passenger side front tire and repeat the procedure in Step 5.
7. The passenger side front
indicator lamp turns off and the passenger side rear indicator lamp comes on to indicate that corner’s sensor is ready to be learned. Proceed to the passenger side rear tire and repeat the procedure in Step 5.
8. The passenger side rear indicator lamp turns off and the driver side rear indicator lamp comes on to indicate that corner’s sensor is ready to be learned. Proceed to the driver side rear tire, and repeat the procedure in Step 5.
9. After the driver side rear TPMS
sensor has been learned the horn chirps two times. The driver side rear indicator lamp turns off and the TPMS sensor matching process is done. Turn the ignition switch to LOCK/OFF. If no tires are learned after entering the TPMS learn mode, or if communication with the receiver stops, or if the time limit has expired, turn the ignition switch to LOCK/OFF and start over beginning with Step 2.
10. Set all four tires to the
recommended air pressure level as indicated on the Tire and Loading Information label.
11. Put the valve caps back on the
valve stems.
Tire Inspection and Rotation We recommend that you regularly inspect the vehicle’s tires, including the spare tire, for signs of wear or damage. See When It Is Time for New Tires on page 9-56 for more information. Tires should be rotated every 5,000 to 8,000 miles (8 000 to 13 000 km). See Scheduled Maintenance on page 11-4. The purpose of a regular tire rotation is to achieve a uniform wear for all tires on the vehicle. This will ensure that your vehicle continues to perform most like it did when the tires were new.
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The compact spare tire, if the vehicle has one, is not included in the tire rotation. After the tires have been rotated, adjust the front and rear inflation pressures as shown on the Tire and Loading Information label. See Inflation - Tire Pressure on page 9-46 and Loading the Vehicle on page 8-28. Reset the Tire Pressure Monitor System. See Tire Pressure Monitor Operation on page 9-51. Make certain that all wheel nuts are properly tightened. See “Wheel Nut Torque†under Capacities and Speciï¬cations on page 10-2.
{ 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 (V6 Engine) on page 9-71.
Any time you notice unusual wear, rotate the 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 9-56 and Wheel Replacement on page 9-61.
When rotating the vehicle’s tires, always use the correct rotation pattern shown here.
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When It Is Time for New Tires Various factors, such as maintenance, temperatures, driving speeds, vehicle loading, and road conditions influence when you need new tires.
One way to tell when it is time for new tires is to check the treadwear indicators, which will appear when the tires have only 1/16 inch (1.6 mm) or less of tread remaining.
You need new tires if any of the following statements are true: (cid:129) You can see the indicators at three or more places around the tire.
(cid:129) You can see cord or fabric
showing through the tire’s rubber. (cid:129) The tread or sidewall is cracked, cut, or snagged deep enough to show cord or fabric.
(cid:129) The tire has a bump, bulge,
or split.
(cid:129) The tire has a puncture, cut, or
other damage that cannot be repaired well because of the size or location of the damage.
The rubber in tires degrades over time, even if they are not being used. This is also true for the spare tire, if the vehicle has one. Multiple conditions affect how fast this aging takes place, including temperatures, loading conditions, and inflation pressure maintenance. With proper care and maintenance tires typically wear out before
they degrade due to age. If you are unsure about the need to replace the tires as they get older, consult the tire manufacturer for more information.
Buying New Tires GM has developed and matched speciï¬c 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 Speciï¬cation (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.
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{ CAUTION
{ 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 the vehicle. Be sure to use the correct size, brand, and type of tires on all wheels. It is all right to drive with the compact spare temporarily, as it was developed for use on the vehicle. See Compact Spare Tire on page 9-79.
If you use bias-ply tires on the 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 the 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.
GM’s exclusive TPC Spec system considers over a dozen critical speciï¬cations 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 near the tire size. If the tires have an all-season tread design, the TPC Spec number will be followed by an MS for mud and snow. See Tire Sidewall Labeling on page 9-40 for additional information. GM recommends replacing tires in sets of four. This is because uniform tread depth on all tires will help keep your vehicle performing most like it did when the tires were new. Replacing less than a full set of tires can affect the braking and handling performance of your vehicle. See Tire Inspection and Rotation on page 9-54 for information on proper tire rotation.
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Vehicles that have a tire pressure monitoring system could give an inaccurate low-pressure warning if non-TPC Spec rated tires are installed on your vehicle. Non-TPC Spec rated tires may give a low-pressure warning that is higher or lower than the proper warning level you would get with TPC Spec rated tires. See Tire Pressure Monitor System on page 9-49. Your vehicle’s original equipment tires are listed on the Tire and Loading Information Label. See Loading the Vehicle on page 8-28, for more information about the Tire and Loading Information Label and its location on your vehicle.
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, antilock 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 speciï¬c wheel and tire systems developed for your vehicle, and have them properly installed by a GM certiï¬ed technician.
See Buying New Tires on page 9-56
and Accessories and Modiï¬cations on page 9-3 for additional information.2008 - Pontiac G8 Owner Manual
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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 speciï¬ed 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 signiï¬cantly 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 speciï¬ed 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 speciï¬ed 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 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,
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If you need to replace any of the 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 the 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 (V6
Engine) on page 9-71 for more information.Used Replacement Wheels
{ CAUTION
Putting a used wheel on the 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.
the alignment might need to be checked. If you notice your vehicle vibrating when driving on a smooth road, the tires and wheels might need to be rebalanced. See your dealer/retailer for proper diagnosis.
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/retailer if any of these conditions exist. Your dealer/retailer 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.
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Tire Chains
{ CAUTION
Do not use tire chains. There is 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 the vehicle and you or others may be injured in a crash.
(Continued)
CAUTION (Continued)
Use another type of traction device only if its manufacturer recommends it for use on the vehicle and tire size combination and road conditions. Follow that manufacturer’s instructions. To help avoid damage to the vehicle, drive slowly, readjust or remove the device if it is contacting the vehicle, and do not spin the vehicle’s wheels. If you do ï¬nd traction devices that will ï¬t, install them on the front tires.
Tire Changing If a Tire Goes Flat It is unusual for a tire to blowout while you are driving, especially if you maintain your tires properly. See Tires on page 9-39. 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 ï¬rmly. Steer to maintain lane position, and then gently brake to a stop well out of the traffic lane.
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{ 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.
Tire Sealant and Compressor Kit If your vehicle has a factory installed Tire Sealant and Compressor kit, there is no spare tire, no tire changing equipment and no place to store a tire.
If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place and stopping. 1. Turn on the hazard warning
flashers. See Hazard Warning Flashers on page 4-4.
2. Park your vehicle. Set the
parking brake ï¬rmly and put the shift lever in PARK (P). See Shifting Into Park (Automatic Transmission) on page 8-10.
3. Turn off the engine. 4. Inspect the flat tire. If the tire has been separated from the wheel, has damaged sidewalls, or has a puncture larger than a 1â„4 inch (6 mm), the tire is too severely damaged for the tire sealant and compressor kit to be effective. See Roadside Assistance Program on page 12-6. If the tire has a puncture less than a 1â„4 inch (6 mm) in the tread area of the tire, see Tire Sealant and Compressor Kit (V8 Engine) on page 9-64.
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. If a tire goes flat, and your vehicle has a compact spare tire, see Changing a Flat Tire (V6 Engine) on page 9-71. This information shows you how to use the vehicle’s tire changing equipment and how to change a flat tire safely.
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Tire Sealant and Compressor Kit (V8 Engine) This vehicle has a tire sealant and compressor kit in place of a jack or spare tire. It is located in a foam container in the trunk. The tire sealant and compressor kit can be used to repair a flat tire by sealing small punctures in the tread of the tire. It can also be used to inflate an underinflated tire. The vehicle must be driven for ï¬ve miles (8 kilometers) after the tire is sealed and inflated to the recommended pressure to ensure the sealant is distributed evenly. For detailed instructions see “Using the Tire Sealant and Compressor Kit to Temporarily Repair a Punctured Tire†later in this section.
The kit includes:
A. On/Off Switch B. Air Compressor Accessory Plug C. Air Compressor D. Sealant Canister E. Sealant/Air Hose F. Air-only Hose G. Pressure Gage
Tire Sealant The sealant can temporarily seal a small puncture up to 6 mm in the tread area of the tire. The sealant cannot seal sidewall damage, large punctures, or a wheel that has unseated from the wheel. Read and follow the safe handling instructions on the label adhered to the sealant canister. Check the tire sealant expiration date on the sealant canister. The sealant canister should be replaced before its expiration date. There is only enough sealant to seal one tire. After usage, the sealant canister and sealant/air hose assembly must be replaced. Replacement sealant canisters are available from a dealer/retailer. See “Removal and Installation of Sealant Canister†later in this section.
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Do a safety check before proceeding. See If a Tire Goes Flat on page 9-62. Inspect the damaged tire. The sealant cannot seal sidewall damage, large punctures, or a tire that has unseated from the wheel. See Roadside Assistance Program on page 12-6. Do not remove any objects that have penetrated the tire. 1. Place the tire sealant and
compressor kit on the ground and unwrap the sealant/air hose (E) from the side of the compressor.
2. Remove the air compressor
accessory plug (B) from the unit. Do not plug the plug in yet. 3. Turn the tire valve stem cap counterclockwise to remove.
4. Attach the sealant/air hose (E) onto the tire valve stem. Turn it clockwise until tight.
5. Make sure the sealant and
compressor kit on/off switch (A) is in the O (off) position. Plug the air compressor accessory plug (B) into an accessory power outlet in the vehicle. See Accessory Power Outlet(s) on page 4-9 for more information. Do not slam door or close window on the compressor accessory plug cord.
{ CAUTION
Idling the engine in a closed-in place or with the climate control system off can cause deadly carbon monoxide (CO). See Engine Exhaust on page 8-12.
6. Start the vehicle. The vehicle must be running while using the air compressor.
Using the Tire Sealant and Compressor Kit to Temporarily Seal and Inflate a Punctured Tire Follow these directions closely for correct sealant usage.
A. On/Off Switch B. Air Compressor Accessory Plug C. Air Compressor D. Sealant Canister E. Sealant/Air Hose F. Air-only Hose G. Pressure Gage
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Vehicle Service and Care
{ CAUTION
Overinflation could cause the tire to rupture, and you or others could be injured. Be sure to read the inflator instructions, and inflate the tire to its recommended pressure. Do not exceed 36 psi (248 kPa).
7. Push the On/Off switch (A) to the
I (on) position. The kit will begin to inject sealant into the tire. Sealant could leak from the puncture hole until the vehicle is driven and the hole has sealed.
8. Check the air pressure gage (G). If there is not a pressure reading while the compressor is running, check for leaks at the connection between the tire valve stem and the sealant/air hose (E).
9. Inflate the tire to the
recommended inflation pressure, found on the Tire and Loading Information label. See Inflation - Tire Pressure on page 9-46. The pressure gage (G) will initially read high while the compressor injects the sealant into the tire. Once the sealant injection is complete, the pressure will quickly drop. It will start to rise again as the tire inflates with air.
10. Turn the compressor off by
pushing the On/Off button (A) to the I (off) position. The pressure gage (G) reads slightly high while the compressor is on. Turn the compressor off to get an accurate reading. The compressor may be turned on and off until the correct pressure is reached.
If the recommended
Notice: pressure cannot be reached after approximately 15 minutes, the vehicle should not be driven. The tire is too severely damaged and the tire sealant and compressor kit cannot inflate the tire. Remove the air compressor accessory plug from the accessory power outlet and unscrew the sealant/air hose from the tire valve or tire pressure monitoring sensor valve. See Roadside Assistance Program on page 12-6.
The tire is not sealed and will continue to leak air until the vehicle is driven and the sealant is distributed in the tire. Steps 11 through 19 must be done right after Step 10. Be careful while handling the tire sealant and compressor kit as they could be hot after usage.
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The maximum speed label reminds you to drive cautiously and not to exceed 55 mph (90 km/h) until you have the damaged tire inspected and repaired.
{ CAUTION
Storing the tire sealant and compressor kit 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 the tire sealant and compressor kit in its original location.
16. Return the equipment to its original storage location in the trunk.
17. Immediately drive the vehicle 5 miles (8 km) to distribute the sealant evenly in the tire.
18. Stop at a safe location and
check the tire pressure, refer to Steps 1 through 9 under “Using the Tire Sealant and Compressor Kit without Sealant to Inflate an Underinflated Tire†later in this section.
