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If you keep driving when the engine is overheated, the liquids in it can catch fire. You or others could be badly burned. Stop the engine if it overheats, and get out of the vehicle until the engine is cool.
If No Steam Is Coming from the Engine Compartment If an engine overheat warning is displayed but no steam can be seen or heard, the problem may not be too serious. Sometimes the engine can get a little too hot when the vehicle: . Climbs a long hill on a hot day. . Stops after high-speed driving.
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10-15
Idles for long periods in traffic. Tows a trailer.
If the overheat warning is displayed with no sign of steam: 1. Turn the air conditioning off. 2. Turn the heater on to the highest
3.
temperature and to the highest fan speed. Open the windows as necessary. In heavy traffic, let the engine idle in N (Neutral) while stopped. If it is safe to do so, pull off the road, shift to P (Park) or N (Neutral), and let the engine idle.
If the temperature overheat gauge is no longer in the overheat zone or an overheat warning no longer displays, the vehicle can be driven. Continue to drive the vehicle slow for about 10 minutes. Keep a safe vehicle distance from the car in front of you. If the warning does not come back on, continue to drive normally.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (16,1)
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Vehicle Care
If the warning continues, pull over, stop, and park the vehicle right away. If there is no sign of steam, idle the engine for three minutes while parked. If the warning is still displayed, turn off the engine until it cools down. Also, see “Overheated Engine Protection Operating Mode” next in this section.
Overheated Engine Protection Operating Mode This emergency operating mode allows the vehicle to be driven to a safe place in an emergency situation. If an overheated engine condition exists, an overheat protection mode, which alternates firing groups of cylinders, helps prevent engine damage. In this mode, there is significant loss in power and engine performance.
The engine coolant temperature warning light comes on in the instrument cluster, to indicate the vehicle has entered overheated engine protection operating mode. The temperature gauge also indicates an overheat condition exists. Driving extended distances and/or towing a trailer in the overheat protection mode should be avoided.
Power Steering Fluid
The power steering fluid reservoir is located under the engine cover on the passenger side toward the rear of the engine compartment. See Engine Compartment Overview on page 10‑5.
When to Check Power Steering Fluid It is not necessary to regularly check power steering fluid unless you suspect there is a leak in the system or an unusual noise is heard. A fluid loss in this system could indicate a problem. Have the system inspected and repaired. How to Check Power Steering Fluid Check the level after the vehicle has been driven for at least 20 minutes so the fluid is warm. To check the power steering fluid: 1. Set the ignition to OFF and let
the engine compartment cool down.
2. Remove the engine cover. Refer
to Engine Cover on page 10‑6. 3. Wipe the cap and the top of the
reservoir clean.
4. Turn the cap counterclockwise
and pull it straight up.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (17,1)
Washer Fluid
What to Use When adding windshield washer fluid to the vehicle, be sure to read the manufacturer instructions before use. If you will be operating your vehicle in an area where the temperature may fall below freezing, use a fluid that has sufficient protection against freezing. Adding Washer Fluid The appropriate message will appear on the Driver Information Center (DIC) when the fluid level is low. See Washer Fluid Messages on page 5‑44.
5. Wipe the dipstick with a
clean rag.
6. Replace the cap and completely
tighten it.
7. Remove the cap again and look at the fluid level on the dipstick.
When the engine is hot, the level should be at the hot MAX level. When the engine is cold, the fluid level should be between MIN and MAX on the dipstick.
What to Use To determine what kind of fluid to use, see Recommended Fluids and Lubricants on page 11‑13. Always use the proper fluid.
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10-17
Open the cap with the washer symbol on it. Add washer fluid until the tank is full. See Engine Compartment Overview on page 10‑5 for reservoir location. Notice
. When using concentrated
washer fluid, follow the manufacturer instructions for adding water.
. Do not mix water with
ready-to-use washer fluid. Water can cause the solution to freeze and damage the washer fluid tank and other parts of the washer system.
. Fill the washer fluid tank only
three-quarters full when it is very cold. This allows for fluid expansion if freezing occurs, which could damage the tank if it is completely full.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (18,1)
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Vehicle Care
. Do not use engine coolant
(antifreeze) in the windshield washer. It can damage the windshield washer system and paint.
Brakes This vehicle has disc brakes. Disc brake pads have built-in wear indicators that make a high-pitched warning sound when the brake pads are worn and new pads are needed. The sound can come and go or be heard all the time the vehicle is moving, except when applying the brake pedal firmly.
{ WARNING
The brake wear warning sound means that soon the brakes will not work well. That could lead to a crash. When the brake wear warning sound is heard, have the vehicle serviced.
Notice: Continuing to drive with worn-out brake pads could result in costly brake repair. Some driving conditions or climates can cause a brake squeal when the brakes are first applied or lightly applied. This does not mean something is wrong with the brakes. Properly torqued wheel nuts are necessary to help prevent brake pulsation. When tires are rotated, inspect brake pads for wear and evenly tighten wheel nuts in the proper sequence to torque specifications in Capacities and Specifications on page 12‑2. Brake linings should always be replaced as complete axle sets. Brake Pedal Travel See your dealer if the brake pedal does not return to normal height, or if there is a rapid increase in pedal travel. This could be a sign that brake service might be required.
Brake Adjustment Every time the brakes are applied, with or without the vehicle moving, the brakes adjust for wear. Replacing Brake System Parts The braking system on a vehicle is complex. Its many parts have to be of top quality and work well together if the vehicle is to have really good braking. The vehicle was designed and tested with top-quality brake parts. When parts of the braking system are replaced, be sure to get new, approved replacement parts. If this is not done, the brakes might not work properly. For example, installing disc brake pads that are wrong for the vehicle, can change the balance between the front and rear brakes — for the worse. The braking performance expected can change in many other ways if the wrong replacement brake parts are installed.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (19,1)
Brake Fluid
The brake master cylinder reservoir is filled with DOT 3 brake fluid as indicated on the reservoir cap. See Engine Compartment Overview on page 10‑5 for the location of the reservoir. There are only two reasons why the brake fluid level in the reservoir might go down:
The brake fluid level goes down because of normal brake lining wear. When new linings are installed, the fluid level goes back up.
. A fluid leak in the brake
hydraulic system can also cause a low fluid level. Have the brake
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10-19
hydraulic system fixed, since a leak means that sooner or later the brakes will not work well.
Do not top off the brake fluid. Adding fluid does not correct a leak. If fluid is added when the linings are worn, there will be too much fluid when new brake linings are installed. Add or remove brake fluid, as necessary, only when work is done on the brake hydraulic system.
{ WARNING
If too much brake fluid is added, it can spill on the engine and burn, if the engine is hot enough. You or others could be burned, and the vehicle could be damaged. Add brake fluid only when work is done on the brake hydraulic system.
When the brake fluid falls to a low level, the brake warning light comes on. See Brake System Warning Light on page 5‑20.
What to Add Use only new DOT 3 brake fluid from a sealed container. See Recommended Fluids and Lubricants on page 11‑13. Always clean the brake fluid reservoir cap and the area around the cap before removing it. This helps keep dirt from entering the reservoir.
{ WARNING
With the wrong kind of fluid in the brake hydraulic system, the brakes might not work well. This could cause a crash. Always use the proper brake fluid.
Notice
. Using the wrong fluid can
badly damage brake hydraulic system parts. For example, just a few drops of mineral-based oil, such as engine oil, in the brake
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (20,1)
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Vehicle Care
hydraulic system can damage brake hydraulic system parts so badly that they will have to be replaced. Do not let someone put in the wrong kind of fluid.
. If brake fluid is spilled on the
vehicle's painted surfaces, the paint finish can be damaged. Be careful not to spill brake fluid on the vehicle. If you do, wash it off immediately.
Battery Refer to the replacement number shown on the original battery label when a new battery is needed. See Engine Compartment Overview on page 10‑5 for battery location.
{ WARNING
Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals
(Continued)
WARNING (CONTINUED)
known to the State of California to cause cancer and reproductive harm. Wash hands after handling.
Vehicle Storage
{ WARNING
Batteries have acid that can burn you and gas that can explode. You can be badly hurt if you are not careful. See Jump Starting on page 10‑71 for tips on working around a battery without getting hurt.
Infrequent Usage: Remove the black, negative (−) cable from the battery to keep the battery from running down. Extended Storage: Remove the black, negative (−) cable from the battery or use a battery trickle charger.
All-Wheel Drive
Transfer Case Under normal driving conditions, transfer case fluid does not require changing or checking unless there is a fluid leak or unusual noise. If required, have the transfer case serviced by your dealer.
Starter Switch Check
{ WARNING When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured.
1. Before starting this check, be
sure there is enough room around the vehicle.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (21,1)
1. Before starting this check, be
sure there is enough room around the vehicle. It should be parked on a level surface.
2. Firmly apply the parking brake. See Electric Parking Brake on page 9‑26. Be ready to apply the regular brake immediately if the vehicle begins to move.
3. With the engine off, turn the
ignition on, but do not start the engine. Without applying the regular brake, try to move the shift lever out of P (Park) with normal effort. If the shift lever moves out of P (Park), contact your dealer for service.
2. Firmly apply both the parking brake and the regular brake. See Electric Parking Brake on page 9‑26. Do not use the accelerator pedal, and be ready to turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle should start only in P (Park) or N (Neutral). If the vehicle starts in any other position, contact your dealer for service.
Automatic Transmission Shift Lock Control Function Check
{ WARNING When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured.
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Park Brake and P (Park) Mechanism Check { WARNING
When you are doing this check, the vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of the vehicle in case it begins to roll. Be ready to apply the regular brake at once should the vehicle begin to move.
Park on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the parking brake.
To check the parking brake's holding ability: With the engine running and the transmission in N (Neutral), slowly remove foot pressure from the regular brake pedal. Do this until the vehicle is held by the parking brake only.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (22,1)
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Vehicle Care
To check the P (Park) mechanism's holding ability: With the engine running, shift to P (Park). Then release the parking brake followed by the regular brake.
Contact your dealer if service is required.
Wiper Blade Replacement Windshield wiper blades should be inspected for wear or cracking. See Maintenance Schedule on page 11‑3. It is a good idea to clean the wiper blade assembly on a regular basis. When worn, or cleaning is ineffective, replace the wiper blade. For proper windshield wiper blade length and type, see Maintenance Replacement Parts on page 11‑14. Notice: Allowing the wiper arm to touch the windshield when no wiper blade is installed could damage the windshield. Any damage that occurs would not be
covered by your warranty. Do not allow the wiper arm to touch the windshield. To replace the wiper blade: 1. Pull the wiper assembly away
from the windshield.
4. Remove the wiper blade. 5. Reverse Steps 1–3 for wiper
blade replacement.
Windshield Replacement For vehicles equipped with the Head-Up Display (HUD), the windshield is part of the HUD system. If the vehicle has to have the windshield replaced, get one that is designed for HUD or the HUD image may look out of focus.
2. Lift up on the latch in the middle
of the wiper blade where the wiper arm attaches.
3. With the latch open, pull the wiper blade down toward the windshield far enough to release it from the J-hooked end of the wiper arm.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (23,1)
Headlamp Aiming Headlamp aim has been preset and should need no further adjustment. If the vehicle is damaged in a crash, the headlamp aim may be affected. If adjustment to the headlamps is necessary, see your dealer.
Bulb Replacement For the proper type of replacement bulbs, see Replacement Bulbs on page 10‑25. For any bulb‐changing procedure not listed in this section, contact your dealer.
High Intensity Discharge (HID) Lighting
{ WARNING
The low beam high intensity discharge lighting system operates at a very high voltage. If you try to service any of the system components, you could be seriously injured. Have your dealer or a qualified technician service them.
After an HID headlamp bulb has been replaced, the beam might be a slightly different shade than it was originally. This is normal.
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10-23
LED Lighting This vehicle has several LED lamps. For replacement of any LED lighting assembly, contact your dealer.
Back-Up Lamps
1. Back-Up Bulb Socket 2. Back-Up Lamp Assembly To replace one of these bulbs: 1. Reach under the rear fascia and
locate the back-up lamp assembly.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (24,1)
License Plate Lamp
10-24
Vehicle Care
2. Remove the bulb socket (1) by
turning counterclockwise and pulling straight out of the lamp assembly (2).
3. Pull the bulb out of the socket. Install the new bulb in the bulb 4. socket. Install the bulb socket by turning clockwise.
5.
Lamp Assembly
Bulb Assembly
1. Bulb Socket 2. Bulb 3. Lamp Assembly To replace one of these bulbs: 1. Push the lamp assembly (3)
toward the center of the vehicle. 2. Pull the lamp assembly down to
remove.
3. Turn the bulb socket (1)
counterclockwise to remove it from the lamp assembly (3).
4. Pull the bulb (2) straight out of
the bulb socket (1).
5. Push the replacement bulb
straight into the bulb socket and turn the bulb socket clockwise to install it into the lamp assembly.
6. Push the lamp assembly back
into position until the release tab locks into place.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (25,1)
Replacement Bulbs
Electrical System
Exterior Lamp
Back-Up Lamp License Plate Lamp
Bulb
Number W16W W5W LL
For replacement bulbs not listed here, contact your dealer.
Electrical System Overload The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the current electrical load is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Fuses and circuit breakers protect power devices in the vehicle. Replace a bad fuse with a new one of the identical size and rating. If there is a problem on the road and a fuse needs to be replaced, the same amperage fuse can be borrowed. Choose some feature of the vehicle that is not needed to use and replace it as soon as possible.
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10-25
Headlamp Wiring An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off. Windshield Wipers If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart. Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Always clear ice and heavy snow from the windshield before using the windshield wipers. If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (26,1)
10-26
Vehicle Care
Fuses and Circuit Breakers The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of damage caused by electrical problems. To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a new one of the identical size and rating.
Fuses of the same amperage can be temporarily borrowed from another fuse location, if a fuse goes out. Replace the fuse as soon as possible. To identify and check fuses, circuit breakers, and relays, see Engine Compartment Fuse Block on page 10‑26, Instrument Panel Fuse Block on page 10‑30, and Rear Compartment Fuse Block on page 10‑32.
Engine Compartment Fuse Block
To remove the fuse block cover, squeeze the three retaining clips on the cover and lift it straight up. Notice: Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (27,1)
Vehicle Care
10-27
J-Case Fuses
Usage
25
26
27
28
41
42
44
45Mini Fuses
Retained Accessory Power Antilock Brake System Pump Electric Parking Brake Rear Window Defogger Brake Vacuum Assist Pump Cooling Fan K2
Headlamp Washer Cooling Fan K1Usage Transmission Control Module — Battery Engine Control Module Battery
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Usage
J-Case Fuses
12
Wiper Starter
J-Case Fuses
Usage
21
22
24
Rear Power Windows Sunroof Front Power Windows
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Black plate (28,1)
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Vehicle Care
Mini Fuses
Usage
Mini Fuses
10
11
Air Conditioning Compressor Clutch Engine Control Module Run/Crank Ignition Coils — Even (Six Cylinder Engine) Ignition Coils — Odd (Six Cylinder Engine) Engine Control Module — Switched Battery (from Engine Control Module Relay) Six Cylinder Engine: Post Catalytic Converter Oxygen Sensor Heater, Mass Air Flow Sensor, Flex Fuel Sensor
13
14
15
16
18
20
23
29
30
Usage Run/Crank for Transmission Control Module and Fuel System Control Module Right Rear Heated Seat Left Rear Heated Seat Vented Seats Run/ Crank Autonet Run/Crank (Aftermarket) Heated Steering Wheel Variable Effort Steering (if equipped) Passive Entry/ Passive Start Module – Battery All-Wheel Drive Module
Mini Fuses
Usage
31
32
33
34
35
37
38
4647
49
Left Front Heated Seat Body Control Module 6
Right Front Heated Seat Antilock Brake System Valves Amplifier Right High Beam Left High Beam Cooling Fan Relay Six Cylinder Engine: Pre Catalytic Converter Oxygen Sensor Heater, Canister Purge Solenoid Right High Intensity Discharge HeadlampCadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (29,1)
Mini Fuses
Usage
Mini Fuses
Usage
Mini Relays
Usage
Vehicle Care
10-29
50
51
5253
54
55
56
57
60
Left High Intensity Discharge Headlamp Horn Cluster Run/Crank Run/Crank for Inside Rearview Mirror, Rear Vision Camera Run/Crank for Heating, Ventilation, and Air Conditioning Outside Rearview Mirror, Universal Garage Door Opener, Front Window Switches Windshield Washer Steering Column Lock Heated Mirror
Ultrasonic Rear Parking Assist/Front Camera Module – Battery Adaptive Forward Lighting (AFL) Module — Battery Trunk Release Fuel System Control Module Regulated Voltage Control Sensor Vent Canister Solenoid Memory Module
62
64
66
67
69
70
71
Mini Relays
13
Usage Engine Control Module Cooling Fan Cooling Fan
15
17
Run/Crank Rear Window Defogger
Micro Relays
Usage
10
14
Air Conditioning Compressor Clutch Starter Wiper Speed Wiper Control Run Cooling Fan Headlamp Low Beam
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (30,1)
10-30
Vehicle Care
Instrument Panel Fuse Block
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuses
Usage
OnStar Body Control Module 7
Body Control Module 5
RadioThe instrument panel fuse block is located in the instrument panel, on the driver side of the vehicle. To access the fuses, open the fuse panel door by pulling down at the top. Press in on the sides of the door to release it from the instrument panel. Pull the door toward you to release it from the hinge.
Fuses
Usage
Infotainment and Center Stack Displays, Head-up Display, Instrument Cluster, Rear Seat Entertainment Power Outlet 1
Power Outlet 2
Body Control Module 1
Body Control Module 4
Body Control Module 8
(J-Case Fuse) Front Heater Ventilation Air Conditioning/Blower (J-Case Fuse) Passenger Seat (Circuit Breaker) Driver Seat (Circuit Breaker)10
11
12
13
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (31,1)
Fuses
Usage
Fuses
Usage
Relays
Usage
Vehicle Care
10-31
14
15
1617
18
19
Diagnostic Link Connector Airbag Glove Box Heater Ventilation Air Conditioning Controller Pre-Fuse for Fuses 1, 4, and 5
Electronic Steering Column Lock20
21
22
23
24
25
26
Automatic Occupant Sensing Spare Steering Wheel Controls/Backlight Body Control Module 3
Body Control Module 2
Column Lock Module AC/DC InverterR1
R2R3
Glove Box Relay Not Used Retained Accessory Power/Accessory Relay
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (32,1)
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Vehicle Care
Rear Compartment Fuse Block
The rear compartment fuse block is located on the left side of the trunk behind a cover.
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuse
Number
F01
F02
F03Usage
Not Used Not Used Not Used
Fuse
Number
Usage
F04
F05
F06
F07Leveling Compressor Not Used Not Used Not Used
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (33,1)
Vehicle Care
10-33
Usage
Relays
Usage
K1
K2
K3
K4
Not Used Front Courtesy Lamps Relay Leveling Compressor Relay Not Used
Fuse
Number
Usage
Fuse
Number
F08
F09
F10
F11
F12
F13
F14
F15
F16
F17F18
F19
F20
F21Front Courtesy Lamps Not Used Not Used Not Used Not Used Not Used Not Used Not Used Not Used Not Used Semi-active Damping System Universal Garage Door Opener/Rain, Light and Humidity Sensor Shunt Side Blind Zone
F22
F23
F24
F25
F26
F27
F28
F29
F30F31
F32
F33
F34
F35
F36
F37Not Used All-Wheel Drive Not Used Not Used Not Used Not Used Not Used Not Used Front Camera Ultrasonic Rear Parking Assist/Lane Departure Not Used Not Used Not Used Not Used Not Used Not Used
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (34,1)
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Vehicle Care
Wheels and Tires
Tires Every new GM vehicle has high-quality tires made by a leading tire manufacturer. See the warranty manual for information regarding the tire warranty and where to get service. For additional information refer to the tire manufacturer.
{ WARNING . Poorly maintained and
improperly used tires are dangerous.
. Overloading the tires can
cause overheating as a result of too much flexing. There could be a blowout and a serious crash. See Vehicle Load Limits on page 9‑10.
(Continued)
WARNING (CONTINUED)
WARNING (CONTINUED)
. Underinflated tires pose the same danger as overloaded tires. The resulting crash could cause serious injury. Check all tires frequently to maintain the recommended pressure. Tire pressure should be checked when the tires are cold.
. Overinflated tires are more likely to be cut, punctured, or broken by a sudden impact — such as when hitting a pothole. Keep tires at the recommended pressure.
. Worn or old tires can cause a
crash. If the tread is badly worn, replace them.
. Replace any tires that have been damaged by impacts with potholes, curbs, etc.
(Continued)
. Improperly repaired tires can
cause a crash. Only the dealer or an authorized tire service center should repair, replace, dismount, and mount the tires.
. Do not spin the tires in
excess of 56 km/h (35 mph) on slippery surfaces such as snow, mud, ice, etc. Excessive spinning may cause the tires to explode.
See Tire Pressure for High-Speed Operation on page 10‑43 for inflation pressure adjustment for high-speed driving.
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (35,1)
All-Season Tires This vehicle may come with all-season tires. These tires are designed to provide good overall performance on most road surfaces and weather conditions. Original equipment tires designed to GM's specific tire performance criteria have a TPC specification code molded onto the sidewall. Original equipment all-season tires can be identified by the last two characters of this TPC code, which will be “MS.” Consider installing winter tires on the vehicle if frequent driving on snow or ice-covered roads is expected. All-season tires provide adequate performance for most winter driving conditions, but they may not offer the same level of traction or performance as winter tires on snow or ice-covered roads. See Winter Tires on page 10‑35.
Winter Tires This vehicle was not, originally, equipped with winter tires. Winter tires are designed for increased traction on snow and ice-covered roads. Consider installing winter tires on the vehicle if frequent driving on snow or ice-covered roads is expected. See your dealer for details regarding winter tire availability and proper tire selection. Also, see Buying New Tires on page 10‑50. With winter tires, there may be decreased dry road traction, increased road noise, and shorter tread life. After changing to winter tires, be alert for changes in vehicle handling and braking. If using winter tires: . Use tires of the same brand and
tread type on all four wheel positions.
Vehicle Care
10-35
. 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 the original equipment tires may not be available for H, V, W, Y, and ZR speed rated tires. If winter tires with a lower speed rating are chosen, never exceed the tire's maximum speed capability.
Summer Tires This vehicle may come with high performance summer tires. These tires have a special tread and compound that are optimized for maximum dry and wet road performance. This special tread and compound will decrease performance in cold climates, and on ice and snow. We recommend installing winter tires on the vehicle if frequent driving in cold temperatures or on snow or ice covered roads is expected. See Winter Tires on page 10‑35.
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Black plate (36,1)
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Vehicle 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 (1) 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. (2) 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. (3) 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. DOT Tire Date of Manufacture: The last four digits of the TIN indicate the tire manufactured date. The first two
digits represent the week (01– 52) and the last two digits, the year. For example, the third week of the year 2010 would have a four-digit DOT date of 0310. (4) Tire Identification Number (TIN): The letters and numbers following the DOT (Department of Transportation) code are the Tire Identification Number (TIN). The TIN shows the manufacturer and plant code, tire size, and date the tire was manufactured. The TIN is molded onto both sides of the tire, although only one side may have the date of manufacture. (5) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. (6) Uniform Tire Quality Grading (UTQG): Tire manufacturers are required to grade tires based on three
Cadillac XTS Owner Manual - 2013 - 1st - 4/13/12
Black plate (37,1)
performance factors: treadwear, traction, and temperature resistance. For more information see Uniform Tire Quality Grading on page 10‑52. (7) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load.
Compact Spare Tire Example (1) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread.
(2) Temporary Use Only: The compact spare tire or temporary use tire should not be driven at speeds over 80 km/h (50 mph). The compact spare tire is for emergency use when a regular road tire has lost air and gone flat. If the vehicle has a compact spare tire, see Compact Spare Tire on page 10‑70 and If a Tire Goes Flat on page 10‑55. (3) Tire Identification Number (TIN): The letters and numbers following the DOT (Department of Transportation) code are the Tire Identification Number (TIN). The TIN shows the manufacturer and plant code, tire size, and date the tire was manufactured. The TIN is molded onto both sides of the tire, although only one side may have the date of manufacture.
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(4) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load. (5) 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 10‑41. (6) 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. (7) TPC Spec (Tire Performance Criteria Specification): Original equipment tires designed to GM's specific tire performance
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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 is an example of a typical passenger vehicle tire size.
(1) 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. (2) Tire Width: The three-digit number indicates the tire section width in millimeters from sidewall to sidewall. (3) 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 3 of the illustration, it would mean that the tire's sidewall is 60 percent as high as it is wide. (4) 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.
(5) Rim Diameter: Diameter of the wheel in inches. (6) Service Description: These characters represent the load index and speed rating of the tire. The load index represents the load carrying 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 kPa (kilopascal) or psi (pounds per square inch). Accessory Weight: The combined weight of optional accessories. Some examples of optional accessories are automatic transmission, power
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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 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 kPa (kilopascal) or psi (pounds per square inch)
before a tire has built up heat from driving. See Tire Pressure on page 10‑41. 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 9‑10.
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GAWR FRT: Gross Axle Weight Rating for the front axle. See Vehicle Load Limits on page 9‑10. GAWR RR: Gross Axle Weight Rating for the rear axle. See Vehicle Load Limits on page 9‑10. 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
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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 9‑10. 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 10‑41 and Vehicle Load Limits on page 9‑10.
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
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of a tire when only 1.6 mm (1/16 in) of tread remains. See When It Is Time for New Tires on page 10‑49. 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 10‑52. 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 9‑10.
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 capacity weight and the original equipment tire size and recommended inflation pressure. See “Tire and Loading Information Label” under Vehicle Load Limits on page 9‑10.
Tire Pressure Tires need the correct amount of air pressure to operate effectively. Notice: Neither tire underinflation nor overinflation is good. Underinflated tires, or tires that do not have enough air, can result in:
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. Tire overloading and
overheating which could lead to a blowout.
. Premature or
irregular wear. . Poor handling. . Reduced fuel economy.
Overinflated tires, or tires that have too much air, can result in:
. Unusual wear. . Poor handling. . Rough ride. . Needless damage from
road hazards.
The Tire and Loading Information label on the vehicle indicates the original equipment tires and the correct cold tire inflation pressures. The recommended pressure is the minimum air pressure needed to support the vehicle's maximum
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load carrying capacity. See Vehicle Load Limits on page 9‑10. How the vehicle is loaded affects vehicle handling and ride comfort. Never load the 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 spare tire. If the vehicle has a compact spare tire, it should be at 420 kPa (60 psi). See Compact Spare Tire on page 10‑70 and Full-Size Spare Tire on page 10‑71.
How to Check Use a good quality pocket-type gauge to check tire pressure. Proper tire inflation cannot be determined by looking at the tire. Check the tire inflation pressure when the tires are cold, meaning
the vehicle has not been driven for at least three hours or no more than 1.6 km (1 mi). Remove the valve cap from the tire valve stem. Press the tire gauge 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 the recommended pressure is reached. If the inflation pressure is high, press on the metal stem in the center of the tire valve to release air. Recheck the tire pressure with the tire gauge. Return the valve caps on the valve stems to prevent leaks and keep out dirt and moisture.
Professional Vehicle If the vehicle has P245/45R19 size tires, the cold inflation pressure is 35 psi (241 kPa). If the vehicle has 235/55R18 size tires, the cold inflation pressure depends on the vehicle mass and should be determined by the vehicle coach-builder. A Tire and Loading Information label provided by the final stage manufacturer should be attached to the B-pillar on the driver side of the vehicle. If the final stage manufacturer's label is not present, contact the coach-builder. Do not use the tire pressures indicated on the General Motors label. These tire pressures are for the incomplete vehicle and are not the correct tire pressures for the completed professional vehicle.
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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 buildup 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.
Vehicles with P245/45R19 98V size tires require inflation pressure adjustment when driving the vehicle at speeds of 160 km/h (100 mph) or higher. Set the cold inflation pressure to 260 kPa (38 psi). Vehicles with P245/40R20 95V size tires require inflation pressure adjustment when driving the vehicle at speeds of 160 km/h (100 mph) or higher. Set the cold inflation pressure to 270 kPa (39 psi). Professional vehicles with 235/ 55R18 104H size tires require inflation pressure adjustment when driving the vehicle at speeds of 160 km/h (100 mph) or higher. Set the cold inflation pressure to 40 kPa (6 psi) above the recommended cold tire pressure shown on the Tire and Loading Information label for the 235/ 55R18 104H size tires. Return the tires to the recommended cold tire inflation pressure when high-speed driving
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has ended. See Vehicle Load Limits on page 9‑10 and Tire Pressure on page 10‑41.
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 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.)
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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 10‑44. Federal Communications Commission (FCC) Rules and with Industry Canada Standards See Radio Frequency Statement on page 13‑15 for information regarding Part 15 of the Federal Communications Commission (FCC) Rules and with Industry Canada Standards RSS-GEN/210/220/310.
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. The TPMS
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sensors monitor the air pressure in the tires and transmits the tire pressure readings to a receiver located in the vehicle.
When a low tire pressure condition is detected, the TPMS illuminates
