2010 Cadillac CTS Owners Manual

Air Quality Sensor/ Inside Rear View Mirror/Rear View Camera

Mini-Fuses

Usage

Mini-Fuses

Usage

AWD

BCM 1

BCM 2

BCM 3

BCM 4

BCM 5

BCM 6, BCM 7
DISPLY

DRL RT

All-Wheel Drive Body Control Module 1
Body Control Module 2
Body Control Module 3
Body Control Module 4
Body Control Module 5
Body Control Module 6 and 7
Display Right Daytime Running Lamp (DRL)

DRL/LT LO BEAM

DRL/WSW

ECM

ECM/

TCM IGN

EMIS 1
EMIS 2
EVEN COILS

Daytime Running Lamps/Left Low-Beam Headlamp Daytime Running Lamps/Windshield Washer Pump Engine Control Module (ECM) ECM, Transmission Control Module (TCM), Instrument Panel Cluster (IPC), PASS-Key III+ Module Emission 1
Emission 2

Even Coils

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9-49

Mini-Fuses FRT FOG Front Fog Lamps

Usage

HDLP WASH HORN

LO BEAM DRL LEFT

LT

HI BEAM

LT

LO BEAM

LTR

Headlamp Washer

Horn Low-Beam Daytime Running Lamps (Left) Left High-Beam Headlamp Left Low-Beam Headlamp Cigarette Lighter

MISC IGN Ignition NAV MTR Navigation Motor ODD COILS Odd Coils PED PRO Not Used

9-50

Vehicle Care

Mini-Fuses

Usage

PWR

MODING

PWR

OUTLET

RT

HI BEAM

RT

LO BEAM

RT

LO BEAM

SPARE

STR/WHL/

CNTRL

TCM BATT

TOSS/BRK VAC RLY

WPR

PassKey Module, Body Control Module Console Auxiliary Power Outlet Right High-Beam Headlamp Right Low-Beam Headlamp Right Low-Beam Headlamp Spare Steering Wheel Illumination Transmission Control Module Battery Transmission Output Speed Sensor/Brake Vacuum Relay Windshield Wiper

J-Case Fuses

Usage

ABS MTR ABS Motor

BLWR BRK

VAC PUMP

EPB FAN 1
FAN 2
REAR DEFOG SPARE STRTR TRLR

Blower Brake Vacuum Pump Electric Park Brake Cooling Fan 1
Cooling Fan 2

Rear Defogger

Spare Starter Trailer Towing

WSW/HTR Not Used

Relays

A/C

CMPRSR

DRL

(W/O HID) LO BEAM

(HID)

FAN S/P

FAN 1
FAN 2

Usage

Air Conditioning Compressor Clutch Daytime Running Lamps (without High Intensity Discharge), Low-Beam Headlamps (High Intensity Discharge) Cooling Fan Series/Parallel Cooling Fan 1
Cooling Fan 2

FOG LAMP Fog Lamps

HDLP WASH

HI BEAM

HORN IGN 1

Headlamp Washer

High-Beam Headlamp Horn Ignition 1

Relays

Usage

Rear Compartment Fuse Block (CTS)

Vehicle Care

9-51

LO BEAM (W/O HID)

Low-Beam (without High Intensity Discharge), Left Daytime Running Lamp (High Intensity Discharge) PWR/TRN Powertrain

LT DRL (HID)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

REAR DEFOG

RT

DRL (HID)

SPARE STRTR WPR

WPR HI

Rear Defogger

Right Daytime Running Lamp (High Intensity Discharge) Spare Starter Windshield Wiper Windshield Wiper High Speed

Relays

FUEL/DR/

RELSE

Usage

Relays

Usage

Not Used

LT/POS/LP Left Position Lamp MRKR/LP Not Used

LCK

Lock

9-52

Vehicle Care

Relays

Usage

REAR/FOG Not Used RT/POS/LP Not Used STOP/LP Not Used TRUNK/ RELSE UNLCK

Unlock

Trunk Release

Mini-Fuses

AIRBAG

AMP AUX/

OUTLET CNSTR/ VENT DR/LCK

ECM

Usage Airbag System Amplifier Auxiliary Power Outlet

Canister Vent

Door Lock Engine Control Module (ECM)

Mini-Fuses EE SEAT Not Used

Usage

FUEL/ PUMP

Fuel Pump

LT/POS/LP Left Position Lamp

MSM

Memory Seat Module

ONSTAR OnStar® System Passenger Door Module Audio System

PDM

RDO

RDO/SPKR Audio Speakers REAR/FOG Not Used

RKE/

PASS-KEY/

MDL

Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module

Usage

Mini-Fuses RT/POS/LP Not Used RT/POS/LP Right Position Lamp

RVC/SNSR

Regulated Voltage Control Sensor Sunroof

S/ROOF STOP/LP Not Used

THEFT/ UGDO

TRLR/ POS/LP TRUNK/ RELSE

Theft Deterrent System, Universal Home Remote System

Not Used

Trunk Release

Vehicle Care

9-53

Rear Compartment Fuse Block (CTS-V)

The rear compartment fuse block is located on top of the battery, on the right side of the trunk. The battery access door must be removed to access the fuse block.

Circuit

Breakers

Usage

DRV/

PWR/SEAT

Left Front Power Seat

LT/

REAR/ WNDW

Left Rear Window

PWR CLMN

Power Steering Column

PWR/ WNDW PASS/

PWR/SEAT

REAR/ WNDW

Power Window

Right Front Power Seat

Right Rear Window

Relays

FUEL/DR/

RELSE

Usage

Relays

Usage

Not Used

LT/POS/LP Left Position Lamp MRKR/LP Not Used

LCK

Lock

9-54

Vehicle Care

Relays

Usage

REAR/FOG Not Used RT/POS/LP Not Used STOP/LP Not Used TRUNK/ RELSE UNLCK

Unlock

Trunk Release

Mini-Fuses

AIRBAG

AMP AUX/

OUTLET CNSTR/ VENT DR/LCK

ECM

Usage Airbag System Amplifier Auxiliary Power Outlet

Canister Vent

Door Lock Engine Control Module (ECM)

Mini-Fuses EE SEAT Not Used

Usage

FUEL/ PUMP

Fuel Pump

LT/POS/LP Left Position Lamp

MSM

Memory Seat Module

ONSTAR OnStar® System Passenger Door Module Audio System

PDM

RDO

REAR/

RDO/SPKR Audio Speakers Rear Differential Cooling Pump

DIFF/PUMP REAR/FOG Not Used

Mini-Fuses

Usage

RKE/

PASS-KEY/

MDL

Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module

RT/POS/LP Right Position Lamp RT/POS/LP Not Used

RVC/SNSR

Regulated Voltage Control Sensor Spare

SPARE STOP/LP Not Used

THEFT/ UGDO

TRUNK/ RELSE

Theft Deterrent System, Universal Home Remote System

Trunk Release

Vehicle Care

9-55

Rear Compartment Fuse Block (CTS Wagon)

The rear compartment fuse block is located on the passenger side of the vehicle, behind the trim panel in the rear compartment.

Circuit

Breakers

Usage

DRV/

PWR/SEAT

Left Front Power Seat

LT/

REAR/ WNDW PASS/

PWR/SEAT

PWR CLMN

PWR/ WNDW REAR/ WNDW

Left Rear Window

Right Front Power Seat Power Steering Column

Power Window

Right Rear Window

Relays

FUEL/DR/

RELSE

Usage

Relays

Usage

Not Used

LT/POS/LP Left Position Lamp MRKR/LP Not Used

LCK

Lock

9-56

Vehicle Care

Relays

Usage

Mini-Fuses

Usage

Mini-Fuses

REAR/FOG Not Used RT/POS/LP Not Used STOP/LP Not Used TRUNK/ RELSE UNLCK

Unlock

Trunk Release

Mini-Fuses

AIRBAG

AMP

Usage Airbag System Amplifier

AUX/

OUTLET CNSTR/ VENT DR/LCK

ECM

FUEL/ PUMP

Auxiliary Power Outlet

Canister Vent

Door Lock Engine Control Module (ECM)

Fuel Pump

LT/POS/LP Left Position Lamp

Usage Memory Seat Module

MSM

ONSTAR OnStar® System Passenger Door Module Audio System

PDM

RDO

RDO/SPKR Audio Speakers REAR/FOG Not Used

REAR/ WSW

Rear Windshield Wiper/Washer

Mini-Fuses

Usage

RKE/

PASS-KEY/

MDL

Remote Keyless Entry System, Pass-Key Theft Deterrent Feature Module

RT/POS/LP Not Used RT/POS/LP Right Position Lamp

RVC/SNSR

S/ROOF

Regulated Voltage Control Sensor Sunroof

Mini-Fuses STOP/LP Not Used

Usage

THEFT/ UGDO

TRLR/ POS/LP WASH/ PUMP

Theft Deterrent System, Universal Home Remote System Trailer Turn Position Lamps Windshield Washer Pump

Vehicle Care

9-57

Circuit

Breakers

Usage

DRV/

PWR/SEAT

Left Front Power Seat

LT/

REAR/ WNDW PASS/

PWR/SEAT

PWR CLMN

PWR/ WNDW REAR/ WNDW

Left Rear Window

Right Front Power Seat Power Steering Column

Power Window

Right Rear Window

9-58

Vehicle Care

Wheels and Tires

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. For additional information refer to the tire manufacturer.

{ WARNING

Poorly maintained and improperly used tires are dangerous.

. Overloading your tires can

cause overheating as a result of too much flexing. You could have an air-out and a serious accident. See Vehicle Load Limits on page 8‑12.

. Underinflated tires pose the same danger as overloaded tires. The resulting accident could cause serious injury. Check all tires frequently to maintain the recommended pressure. Tire pressure should be checked when your tires are cold. See Tire Pressure on page 9‑66.

(Continued)

WARNING (Continued)

. 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.

. Worn, old tires can cause accidents. If your tread is badly worn, or if your tires have been damaged, replace them.

See Tire Pressure for High-Speed Operation on page 9‑67 for inflation pressure adjustment for high speed driving.

Winter Tires If you expect to drive on snow or ice covered roads often, you may want to get winter tires for your vehicle. All season tires provide good overall performance on most surfaces but they may not offer the traction you would like or the same level of performance as winter tires on snow or ice covered roads. Winter tires, in general, are designed for increased traction on snow and ice covered roads. With winter tires, there may be decreased dry road traction, increased road noise, and shorter tread life. After switching to winter tires, be alert for changes in vehicle handling and braking. See your dealer/retailer for details regarding winter tire availability and proper tire selection. Also, see Buying New Tires on page 9‑75.

If you choose to use winter tires: . Use tires of the same brand and

tread type on all four wheel positions.

. Use only radial ply tires of the

same size, load range, and speed rating as the original equipment tires.

Winter tires with the same speed rating as your original equipment tires may not be available for H, V, W, Y, and ZR speed rated tires. If you choose winter tires with a lower speed rating, never exceed the tire's maximum speed capability.

Low-Profile Tires If your vehicle has 235/50ZR18, P235/50R18, 255/40ZR19 or 285/35ZR19 size tires, they are classified as low-profile tires. These tires are designed for very responsive driving on wet

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or dry pavement. You may also notice more road noise with low-profile performance tires and that they tend to wear faster. Notice: If the vehicle has low-profile tires, they are more susceptible to damage from road hazards or curb impact than standard profile tires. Tire and/or wheel assembly damage can occur when coming into contact with road hazards like, potholes, or sharp edged objects, or when sliding into a curb. The vehicle warranty does not cover this type of damage. Keep tires set to the correct inflation pressure and, when possible avoid contact with curbs, potholes, and other road hazards.

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Vehicle Care

Summer Performance Tires Many General Motors high performance models come factory-equipped with tires that are optimized for maximum dry and wet road performance while still retaining satisfactory tread life, excellent durability, and low noise levels. In severe winter climates where snowfall may be significant, these tires may be found to provide less traction.

Tire Sidewall Labeling Useful information about a tire is molded into its sidewall. The examples below show a typical passenger vehicle tire and a compact spare tire sidewall.

(B) TPC Spec (Tire Performance Criteria Specification): Original equipment tires designed to GM's specific tire performance criteria have a TPC specification code molded onto the sidewall. GM's TPC specifications meet or exceed all federal safety guidelines. (C) DOT (Department of Transportation): The Department of Transportation (DOT) code indicates that the tire is in compliance with the U.S. Department of Transportation Motor Vehicle Safety Standards. (D) Tire Identification Number (TIN): The letters and numbers following the DOT (Department of Transportation) code is the Tire Identification Number (TIN).

Passenger (P-Metric) Tire Example (A) Tire Size: The tire size 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.

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 9‑78 . (G) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load.

Compact Spare Tire Example

(A) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. (B) Temporary Use Only: The compact spare tire or temporary use tire has a tread life of approximately 5 000 km (3,000 miles) and should not be driven at speeds over 105 km/h (65 mph). The compact spare tire is for emergency use when a regular road tire has lost air

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and gone flat. If your vehicle has a compact spare tire, see Compact Spare Tire on page 9‑102 and If a Tire Goes Flat on page 9‑81 . (C) Tire Identification Number (TIN): The letters and numbers following the DOT (Department of Transportation) code is the Tire Identification Number (TIN). The TIN shows the manufacturer and plant code, tire size, and date the tire was manufactured. The TIN is molded onto both sides of the tire, although only one side may have the date of manufacture. (D) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load.

9-62

Vehicle Care

(E) Tire Inflation: The temporary use tire or compact spare tire should be inflated to 420 kPa (60 psi). For more information on tire pressure and inflation see Tire Pressure on page 9‑66 . (F) Tire Size: A combination of letters and numbers define a tire's width, height, aspect ratio, construction type, and service description. The letter T as the first character in the tire size means the tire is for temporary use only. (G) 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.

Tire Designations

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 first 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 index and speed rating of the tire. The load index represents the load carry capacity a tire is certified to carry. The speed rating is the maximum speed a tire is certified to carry a load.

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 psi (pounds per square inch) or kPa (kilopascal). Accessory Weight: This means the combined weight of optional accessories. Some examples of optional accessories are, automatic

transmission, power steering, power brakes, power windows, power seats, and air conditioning. Aspect Ratio: The relationship of a tire's height to its width. Belt: A rubber coated layer of cords that is located between the plies and the tread. Cords may be made from steel or other reinforcing materials. Bead: The tire bead contains steel wires wrapped by steel cords that hold the tire onto the rim. Bias Ply Tire: A pneumatic tire in which the plies are laid at alternate angles less than 90 degrees to the centerline of the tread. Cold Tire Pressure: The amount of air pressure in a tire, measured in psi (pounds per square inch) or kPa (kilopascal)

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before a tire has built up heat from driving. See Tire Pressure on page 9‑66 . 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 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 Vehicle Load Limits on page 8‑12 .

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Vehicle Care

GAWR FRT: Gross Axle Weight Rating for the front axle. See Vehicle Load Limits on page 8‑12 . GAWR RR: Gross Axle Weight Rating for the rear axle. See Vehicle Load Limits on page 8‑12 . 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 68 kg (150 lbs). See Vehicle Load Limits on page 8‑12 . 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 Tire Pressure on page 9‑66 and Vehicle Load Limits on page 8‑12 .

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 1.6 mm (1/16 inch) of tread remains. See When It Is Time for New Tires on page 9‑74 . 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 9‑78 .

Vehicle Care

9-65

Vehicle Capacity Weight: The number of designated seating positions multiplied by 68 kg (150 lbs) plus the rated cargo load. See Vehicle Load Limits on page 8‑12 . 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 Vehicle Load Limits on page 8‑12 .

9-66

Vehicle Care

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

. Too much flexing . Too much heat . Tire overloading . Premature or irregular wear . Poor handling . Reduced fuel economy

If your tires have too much air (over-inflation), you can get the following:

. Unusual wear . Poor handling . Rough ride . Needless damage from

road hazards

A vehicle specific Tire and Loading Information label is attached to your vehicle. 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 Vehicle Load Limits on page 8‑12 . 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. Do not forget to check the compact spare tire, if the vehicle has one. The compact spare should be at 60 psi (420 kPa). For additional information regarding the compact spare tire, see Compact Spare Tire on page 9‑102 .

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 are under-inflated. 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 1.6 km (1 mile). Remove the valve cap from the tire valve stem. Press the tire gage firmly onto the valve to get a pressure measurement. If the cold tire inflation pressure matches the recommended pressure on the Tire and Loading Information label, no further adjustment is necessary. If the inflation pressure is low, add air until you reach the recommended amount.

If you overfill the tire, release air by pushing on the metal stem in the center of the tire valve. Re-check the tire pressure with the tire gage. Be sure to put the valve caps back on the valve stems. They help prevent leaks by keeping out dirt and moisture.

Tire Pressure for High-Speed Operation

{ WARNING

Driving at high speeds, 160 km/h (100 mph) 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

(Continued)

Vehicle Care

9-67

WARNING (Continued)

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.

If your vehicle has 235/50ZR18, 255/40ZR19 or 285/35ZR19 size tires, they will require inflation pressure adjustment when driving your vehicle at speeds of 160 km/h (100 mph) or higher. Set the cold inflation pressure to the maximum inflation pressure shown on the tire sidewall, or 300 kPa (44 psi), whichever is lower. See the example following.

9-68

Vehicle Care

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 Vehicle Load Limits on page 8‑12 and Tire Pressure on page 9‑66 . Example: You will find the maximum load and inflation pressure molded on the tire's sidewall, in small letters, near the rim flange. It will read something like this: Maximum load 690 kg (1521 lbs) 300 kPa (44 psi) Max. Press. For this example, you would set the inflation pressure for high-speed driving at 44 psi (300 kPa).

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 significantly under-inflated. 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 significantly 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 9‑69 for additional information. Federal Communications Commission (FCC) and Industry and Science Canada See Radio Frequency Statement on page 12‑16 for information regarding Part 15 of the Federal Communications Commission (FCC) Rules and RSS-210/211 of Industry and Science Canada.

Vehicle Care

9-69

Tire Pressure Monitor Operation This vehicle may have a Tire Pressure Monitor System (TPMS). The 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, if the vehicle has one. The TPMS sensors monitor the air pressure in the vehicle's tires and transmits the tire pressure readings to a receiver located in the vehicle. Using the Driver Information Center (DIC), the driver can also check tire pressure levels using the DIC. For additional information and details about the DIC operation and displays see Driver Information Center (DIC) on page 4‑31 and Tire Messages on page 4‑48 .

9-70

Vehicle Care

When a low tire pressure condition is detected, the TPMS illuminates the low tire pressure warning light located on the instrument panel cluster. A DIC warning message to check the pressure in a specific tire is also shown on the DIC display screen. The low tire pressure warning light and the DIC warning message come at each ignition cycle until the tires are inflated to the correct inflation pressure. The low tire pressure warning light may come on in cool weather when the vehicle is first 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. The Tire and Loading Information label, attached to your vehicle, shows the size of your vehicle's original equipment tires and the correct inflation pressure for the tires when they are cold. See Vehicle Load Limits on page 8‑12 , for an example of the Tire and Loading Information label and its location on your vehicle. Also see Tire Pressure on page 9‑66. Your vehicle's TPMS can warn you about a low tire pressure condition but it does not replace normal tire maintenance. See Tire Inspection on page 9‑73 , Tire Rotation on page 9‑73 and Tires on page 9‑58.

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. Factory-installed Tire Inflator Kits use a GM approved liquid tire sealant. Using non-approved tire sealants could damage the TPMS sensors. See Tire Sealant and Compressor Kit on page 9‑84 for information regarding the inflator kit materials and instructions.

TPMS Malfunction Light and Message The TPMS will not function properly if one or more of the TPMS sensors are missing or inoperable. When the system detects a malfunction, the low tire warning light flashes for about one minute and then stays on for the remainder of the ignition cycle. A DIC warning message is also displayed. 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: . One of the road tires has been

replaced with the spare tire, if the vehicle has one. The spare tire does not have a TPMS sensor. The DIC message should go off once you re-install the road tire containing the TPMS sensor.

The TPMS sensor matching process was not done or not completed successfully after rotating the vehicle's tires. The DIC message should go off after successfully completing the sensor matching process. See “TPMS Sensor Matching Process” later in this section.

. 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 your dealer/ retailer for service.

. Replacement tires or wheels do not match your vehicle's original equipment tires or wheels. Tires and wheels other than those recommended for your vehicle could prevent the TPMS from functioning properly. See Buying New Tires on page 9‑75.

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. Operating electronic devices or being near facilities using radio wave frequencies similar to the TPMS could cause the TPMS sensors to malfunction.

If the TPMS is not functioning it cannot detect or signal a low tire condition. See your 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 identification code. Any time you replace one or more of the TPMS sensors or rotate your vehicle's tires, the identification codes need to be matched to the new tire/wheel position. The sensors are matched to the tire/wheel positions 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.

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Vehicle Care

The TPMS sensors can also be matched to each tire/wheel position by increasing or decreasing the tire's air pressure. If increasing the tire's air 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 the first tire/wheel position, and five minutes overall, to match all four tire/wheel positions. If it takes longer than two minutes, to match the first tire and wheel, or more than five minutes to match all four tire and wheel positions, the matching process stops and you need to start over.

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 the Remote Keyless Entry

(RKE) transmitter's lock and unlock buttons at the same time for approximately five seconds. The horn sounds twice to signal the receiver is in relearn mode and Tire Learning Active message displays on the DIC screen.

4. Start with the driver side

front tire.

5. Remove the valve cap from the valve stem. Activate the TPMS sensor by increasing or decreasing the tire's air pressure for 10 seconds, or until a horn chirp sounds. The horn chirp, which can take up to 30 seconds to sound, confirms that the

TPMS sensor identification code has been matched to this tire position.

6. Proceed to the passenger side

front tire, and repeat the procedure in Step 5.

7. Proceed to the passenger side

rear tire, and repeat the procedure in Step 5.

8. Proceed to the driver side rear tire, and repeat the procedure in Step 5.

9. After hearing the confirming horn chirp, for the driver side rear tire, the horn sounds two more times to signal the tire learning mode is no longer active. Turn the ignition switch to LOCK/OFF.

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.

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Use the rotation pattern shown here when rotating tires of the same size installed on all four wheel positions.

Tire Inspection We recommend that you regularly inspect your vehicle's tires, including the spare tire, if the vehicle has one, for signs of wear or damage. See When It Is Time for New Tires on page 9‑74 for more information.

Tire Rotation Tire rotation is not recommended if the vehicle has 255/40R19 size tires on the front wheels and 285/35R19 size tires on the rear wheels. Different tire sizes should not be rotated front to rear. Each tire and wheel should only be used in its original front or rear position.

Tire rotation is recommended if the vehicle has the same size tires on all four wheel positions. These tires should be rotated every 5,000 to 8,000 miles (8 000 to 13 000 km). See Scheduled Maintenance on page 10‑3 . The purpose of a regular tire rotation is to achieve a uniform wear for all tires on the vehicle. This will ensure that the vehicle continues to perform most like it did when the tires were new. 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 9‑74 and Wheel Replacement on page 9‑80 .

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Vehicle Care

After the tires have been rotated, adjust the front and rear inflation pressures as shown on the Tire and Loading Information label. See Tire Pressure on page 9‑66 and Vehicle Load Limits on page 8‑12 . Reset the Tire Pressure Monitor System. See Tire Pressure Monitor Operation on page 9‑69 . Make certain that all wheel nuts are properly tightened. See “Wheel Nut Torque” under Capacities and Specifications on page 11‑2 .

{ WARNING

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 changing a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In an emergency, 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 If a Tire Goes Flat on page 9‑81 .

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 appear when the tires have only 1.6 mm (1/16 inch) or less of tread remaining.

The vehicle needs new tires if any of the following statements are true: . You can see the indicators at three or more places around the tire.

. You can see cord or fabric showing through the tire's rubber. The tread or sidewall is cracked, cut, or snagged deep enough to show cord or fabric. The tire has a bump, bulge, or split. The tire has a puncture, cut, or other damage that cannot be repaired well because of the size or location of the damage.

The rubber in tires degrades over time. This is also true for the spare tire, if the vehicle has one, even if it is not being used. 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.

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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.

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Vehicle Care

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 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 9‑60 , 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 on page 9‑73 and Tire Rotation on page 9‑73. Winter tires with the same speed rating as your original equipment tires may not be available for H, V, W, Y and ZR speed rated tires. If you choose snow tires with a lower speed rating, never exceed the tire's maximum speed capability.

{ WARNING

Mixing tires could cause you to lose control while driving. If you mix tires of different sizes (other than those originally installed on your vehicle), 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 (other than those originally installed on your vehicle), brands or types, may also cause damage to your vehicle. Be sure to use the correct size, brand, and type tires on all four wheels.

{ WARNING

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.

Vehicles that have a tire pressure monitoring system could give an inaccurate low-pressure warning if non-TPC Spec rated tires are installed on it. 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 Operation on page 9‑69 . Your vehicle's original equipment tires are listed on the Tire and Loading Information label. See Vehicle Load Limits on page 8‑12 , for more information about the Tire and Loading Information label and its location on your vehicle.

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Different Size Tires and Wheels If you add wheels or tires that are a different size than your original equipment wheels and tires, this could 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. See Buying New Tires on page 9‑75 and Accessories and Modifications on page 9‑3 for additional information.

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Vehicle Care

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 25 to 30 cm (10 to 12 inches), 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.

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. It should be noted that 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.

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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 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. CTS-V models should only use adhesive wheel weights to balance the tires and wheels.

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Vehicle Care

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.

If you need to replace any of the wheels, wheel bolts, wheel nuts, or Tire Pressure Monitor System (TPMS) sensors, replace them only with new GM original equipment parts. This way, you will be sure to have the right wheel, wheel bolts, wheel nuts, and TPMS sensors for the vehicle.

{ WARNING

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 If a Tire Goes Flat on page 9‑81 for more information. Used Replacement Wheels

{ WARNING

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