2012 Buick Regal Owners Manual

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. Also, water does not clean as well as washer fluid.

. 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.

. Do not use engine coolant

(antifreeze) in the windshield washer. It can damage the windshield washer system and paint.

Buick Regal Owner Manual - 2012

Black plate (28,1)

10-28

Vehicle Care

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.

Buick Regal Owner Manual - 2012

Black plate (29,1)

Brake Fluid

The brake master cylinder and, on manual transmission vehicles, the clutch hydraulic system use the same reservoir. See Engine Compartment Overview on page 10‑6 for the location of the reservoir. The reservoir is filled with with either DOT 3 or DOT 4
brake fluid as indicated on the reservoir cap. 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/clutch

hydraulic system can also cause a low fluid level. Have the brake/clutch hydraulic system fixed, since a leak means that sooner or later the brakes will not work well.

Do not top off the brake/clutch 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 fluid, as necessary, only when work is done on the brake/clutch 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/clutch hydraulic system.

Vehicle Care

10-29

Checking Brake Fluid The brake/clutch fluid can be checked without taking off the cap by looking at the brake/clutch fluid reservoir. The fluid level should be above MIN. If it is not, have the brake/clutch hydraulic system checked to see if there is a leak. After work is done on the brake/clutch hydraulic system, make sure the level is above MIN but not over the MAX mark. When the brake/clutch fluid falls to a low level, the brake warning light comes on. See Brake System Warning Light on page 5‑18.

What to Add If the vehicle has DOT 3 brake fluid, as indicated on the reservoir cap, use only new DOT 3 brake fluid from a sealed container. See Recommended Fluids and Lubricants on page 11‑12.

Buick Regal Owner Manual - 2012

Black plate (30,1)

10-30

Vehicle Care

If the vehicle has DOT 4 brake fluid, as indicated on the reservoir cap, use only new DOT 4 brake fluid from a sealed container. It is recommended that the brake/clutch hydraulic system be flushed and refilled with new DOT 4 fluid at a regular maintenance service every two years. See Maintenance Schedule on page 11‑3 and Recommended Fluids and Lubricants on page 11‑12. Always clean the brake/clutch 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/clutch hydraulic system, the brakes might not work well. This could cause a crash. Always use the proper brake/clutch fluid.

Notice

. Using the wrong fluid can

badly damage brake/clutch hydraulic system parts. For example, just a few drops of mineral-based oil, such as engine oil, in the brake 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 This vehicle has a standard 12‐volt battery. Refer to the replacement number on the original battery label when a new standard 12‐volt battery is needed. eAssist vehicles also have a high voltage battery. Only a trained service technician with the proper knowledge and tools should inspect, test, or replace the high voltage battery. See your dealer if the high voltage battery needs service. The dealer has information on how to recycle the high voltage battery. There is also information available at http://www.recyclemybattery.com.

{ WARNING

Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.

Buick Regal Owner Manual - 2012

Black plate (31,1)

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-board with eAssist Only) on page 10‑94 or Jump Starting (with or without eAssist) on page 10‑95
for tips on working around a battery without getting hurt.

Infrequent Usage: Remove the 12‐volt battery black, negative (−) cable from the battery to keep the battery from running down. Extended Storage: Remove the 12‐volt battery black, negative (−) cable from the battery or use a battery trickle charger. Remember to reconnect the battery when ready to drive the vehicle.

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.

2. Firmly apply both the parking brake and the regular brake. See Parking Brake on page 9‑38. Do not use the accelerator pedal, and be ready to turn off the engine immediately if it starts.

Vehicle Care

10-31

3. For automatic transmission

vehicles, 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. For manual transmission vehicles, put the shift lever in Neutral, push the clutch pedal down halfway, and try to start the engine. The vehicle should start only when the clutch pedal is pushed down all the way to the floor. If the vehicle starts when the clutch pedal is not pushed all the way down, contact your dealer for service.

Buick Regal Owner Manual - 2012

Black plate (32,1)

10-32

Vehicle Care

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.

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 Parking Brake on page 9‑38. 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.

Ignition Transmission Lock Check While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position.

For automatic transmission vehicles, the ignition should turn to LOCK/OFF only when the shift lever is in P (Park). The ignition key should come out only in LOCK/OFF.

For manual transmission vehicles, the ignition key should come out only in LOCK/OFF. Contact your dealer if service is required.

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.

Buick Regal Owner Manual - 2012

Black plate (33,1)

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. 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 for more information. It is a good idea to clean or replace the wiper blade assembly on a regular basis or when worn. For proper windshield wiper blade length and type, see Maintenance Replacement Parts on page 11‑14. Notice: Allowing the wiper blade 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 blade arm to touch the windshield.

Vehicle Care

10-33

To replace the wiper blade: 1. Pull the wiper assembly away

from the windshield.

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.

4. Remove the wiper blade. 5. Reverse Steps 1 through 3 for

wiper blade replacement.

Buick Regal Owner Manual - 2012

Black plate (34,1)

10-34

Vehicle Care

Headlamp Aiming Headlamp aim has been preset at the factory and should need no further adjustment. However, if the vehicle is damaged in a crash, the headlamp aim may be affected. Aim adjustment to the low-beam headlamps may be necessary if oncoming drivers flash their high-beam headlamps at you (for vertical aim). If the headlamps need to be re-aimed, it is recommended that the vehicle be taken to a dealer for service.

Bulb Replacement For the proper type of replacement bulbs, see Replacement Bulbs on page 10‑38. For any bulb‐changing procedure not listed in this section, contact your dealer.

Halogen Bulbs

{ WARNING

Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package.

Headlamps, Front Turn Signal and Parking Lamps

Base Headlamp Assembly (Passenger Side Shown, Driver Side Similar) A. High‐Beam Headlamp B. Turn Signal Lamp C. Low‐Beam Headlamp/Daytime

Running Lamp (DRL)

D. Parking Lamp E. Sidemarker Lamp

Buick Regal Owner Manual - 2012

Black plate (35,1)

Low-Beam Headlamps/Daytime Running Lamps (DRL), High-Beam Headlamps (Base) 1. For the driver side bulb, remove

the windshield washer bottle filler neck by firmly pulling it straight up and out of the bottle. 2. Remove the outside cap for the low-beam headlamp/DRL bulb replacement from the back of the headlamp assembly.

3. Remove the inside cap for the

high-beam headlamp bulb replacement from the back of the headlamp assembly. 4. Disconnect the electrical

connector.

Vehicle Care

10-35

5. Remove the bulb socket from

the headlamp assembly.

6. Replace the bulb in the bulb

7.

socket. Install the bulb socket in the headlamp assembly.

8. Reverse Steps 1 through 4 to

reinstall the outside or inside cap on the headlamp assembly.

High/Low‐Beam Headlamps (Uplevel) The high/low‐beam headlamps on the uplevel headlamp system are High Intensity Discharge (HID) and should be replaced at the dealer.

Uplevel Headlamp Assembly (Passenger Side Shown, Driver Side Similar) A. High/Low‐Beam Headlamp ‐

To be replaced at the dealer only

B. Turn Signal Lamp

Buick Regal Owner Manual - 2012

Black plate (36,1)

10-36

Vehicle Care

Front Turn Signal/Parking/ Sidemarker Lamps (Base and Uplevel) To replace the front turn signal, parking lamp, or sidemarker lamp: 1. For the driver side bulb, remove

the windshield washer bottle filler neck by firmly pulling it straight up and out of the bottle.

2. Remove the bulb socket from

the headlamp assembly by turning it counterclockwise. 3. Remove the bulb from the

socket.

4. Replace the bulb in the bulb

5.

socket. Install the bulb socket in the headlamp assembly by turning it clockwise.

6. For the driver side, reinstall the

windshield washer bottle filler neck by firmly pushing it straight into the bottle. Ensure that the filler neck clip engages into the underhood electrical center retainer.

Fog Lamps To replace the fog lamp bulb: 1. Locate the bulb assembly under

the front fascia.

2. Disconnect the electrical connector from the bulb assembly.

3. Remove the bulb by turning it counterclockwise and pulling it straight out of the assembly. Install the new bulb by turning it clockwise into the assembly.

4.

5. Reconnect the electrical

connector to the bulb assembly.

Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps

A. Taillamp/Sidemarker Lamp B. Taillamp C. Stop/Turn Signal Lamp D. Back-up Lamp

Buick Regal Owner Manual - 2012

Black plate (37,1)

To replace any one of these bulbs: 1. Open the trunk. See Trunk

Release on page 1‑5.

2. Remove the taillamp assembly

access panel.

3. Remove the two nuts that

secure the taillamp assembly. 4. Remove the taillamp assembly and detach the wiring harness connector.

Vehicle Care

10-37

License Plate Lamp To replace one of these bulbs:

A. Back-up Lamp B. Taillamp C. Stop/Turn Signal Lamp D. Taillamp/Sidemarker Lamp

5. Turn the bulb socket

counterclockwise to remove it. 6. Pull the bulb from the socket. 7. 8. Turn the bulb socket clockwise

Install a new bulb.

to install it.

9. Reverse Steps 2 through 4 to

reinstall the taillamp assembly.

Passenger Side Shown,

Driver Side Similar

1. Push the release tab (A) toward

the lamp assembly.

2. Pull the lamp assembly down to

remove.

Buick Regal Owner Manual - 2012

Black plate (38,1)

10-38

Vehicle Care

Replacement Bulbs

Electrical System

Exterior Lamp

Back-up Lamp Fog Lamp Front Turn Signal Lamp Front Sidemarker Lamp (Base) High‐Beam Headlamp (Base) License Plate Lamp Low‐Beam Headlamp/Daytime Running Lamp (DRL) Stoplamp/Turn Signal Lamp Taillamp/ Sidemarker Lamp

Bulb

Number 3157 K

H10

3457 NAK

194NA

H7

194

H11

3157 K

3157 K

For replacement bulbs not listed here, contact your dealer.

High Voltage Devices and Wiring

{ WARNING

Exposure to high voltage can cause shock, burns, and even death. The high voltage components in the vehicle can only be serviced by technicians with special training. High voltage components are identified by labels. Do not remove, open, take apart, or modify these components. High voltage cable or wiring has orange covering. Do not probe, tamper with, cut, or modify high voltage cable or wiring.

A. Bulb Socket B. Bulb C. Lamp Assembly

3. Turn the bulb socket (A)

counterclockwise to remove it from the lamp assembly (C).

4. Pull the bulb (B) straight out of

the bulb socket.

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.

Buick Regal Owner Manual - 2012

Black plate (39,1)

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.

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.

Vehicle Care

10-39

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 10‑40 and Instrument Panel Fuse Block on page 10‑43.

Buick Regal Owner Manual - 2012

Black plate (40,1)

10-40

Vehicle Care

Engine Compartment Fuse Block

To remove the fuse block cover, press 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.

Engine Compartment Fuse Block

Fuse

Number

Usage

Fuse

Number

Usage

Transmission Control Module Engine Control Module

Not Used Not Used

Buick Regal Owner Manual - 2012

Black plate (41,1)

Fuse

Number

Usage

Fuse

Number

Usage

Fuse

Number

Usage

Vehicle Care

10-41

Ignition, Transmission Control Module, Engine Control Module Windshield Wiper Not Used Fuel Injection, Ignition System Even Fuel Injection, Ignition System Odd Engine Control Module Oxygen Sensor Starter Fuel System Control Module Secondary Air Induction

10

11
12

13

14

15
16
17
18
19
20

21

22

23

24

25

26

27

Not Used Vacuum Pump Ignition, Airbag Not Used Not Used Not Used Rear Power Windows Antilock Brake System Valve Variable Effort Steering Front Power Windows Power Outlets Antilock Brake System Pump Electric Parking Brake

28

29

30

31

32

33
34
35
36

37

38

39

Heated Rear Window Left‐Hand Seat Lumbar Right‐Hand Seat Lumbar Not Used Body Control Module 6
Heated Front Seats Sunroof Infotainment System Not Used Right‐Hand High‐Beam Headlamp Left‐Hand High‐Beam Headlamp Not Used

Buick Regal Owner Manual - 2012

Black plate (42,1)

10-42

Vehicle Care

Fuse

Number

Usage

Fuse

Number

Usage

Fuse

Number

Usage

40
41
42
43

44

45

46

47
48

49

50

Not Used Vacuum Pump Radiator Fan 1
Not Used Headlamp Washer System (if equipped) Radiator Fan 2
Terminal 87, Main Relay Oxygen Sensor Fog Lamps Right‐Hand Low Beam, High Intensity Discharge Headlamp Left‐Hand Low Beam, High Intensity Discharge Headlamp

51

52

53

54
55
56
57
58

59

60
61

62

63
64

Horn Motor Indicator Lamp Ignition, Inside Rearview Mirror Not Used Power Windows Windshield Washer Not Used Not Used Secondary Air Induction Heated Mirrors Not Used Canister Vent Solenoid Not Used Not Used

65
66

67

68
69
70
71

Not Used Not Used Fuel System Control Module Not Used Battery Sensor Not Used Not Used

Relay

Number

Usage

K1
K2
K3
K4

K5

K6

Not Used Starter Cooling Fan (LHU) Front Wiper (Step 2) Front Wiper (Step 1, Interval) SAI Valve

Buick Regal Owner Manual - 2012

Black plate (43,1)

Relay

Number

Usage

Instrument Panel Fuse Block

Vehicle Care

10-43

K7
K8

K9

K10
K11
K12

K13

K14

K15

K16

K17

Main Relay Not Used Cooling Fan (LAF/LHU) Cooling Fan (LAF) Not Used Cooling Fan (LHU) Cooling Fan (LAF/LHU) High Intensity Discharge Lamps Ignition Secondary AIR Pump Window/Mirror Defog

The instrument panel fuse block is located in the instrument panel, on the driver side of the vehicle. To access the fuses, open the storage compartment. Press in on the sides of the compartment to release it from the instrument panel. Pull the door toward you to release it from the hinge.

Instrument Panel Fuse Block

Number

Usage

Suspension Control Module Body Control Module 7
Body Control Module 5
Radio

Buick Regal Owner Manual - 2012

Black plate (44,1)

10-44

Vehicle Care

Number

Usage

Number

Usage

Number

Radio Displays, Park Assist, Infotainment, Module Tunnel Control Power Outlet 1
Power Outlet 2
Body Control Module 3
Body Control Module 4
Body Control Module 8
Front Heater Ventilation Air Conditioning/Blower Right‐Hand Power Front Seat

10

11

12

22

23

24

25
26

13

14

15
16

17

18

19

20

21

Left‐Hand Power Front Seat Diagnostic Link Connector Airbag Trunk Release Heating Ventilation Air Conditioning Controller Service Fuse, Logistic Relay Not Used Automatic Occupant Sensing Instrument Panel Cluster

Usage Discrete Logic Ignition Switch Body Control Module 1
Body Control Module 2
OnStar Power Outlet, Trunk

Buick Regal Owner Manual - 2012

Black plate (45,1)

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 9‑12.

(Continued)

Vehicle Care

10-45

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 55 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 10‑54 for inflation pressure adjustment for high-speed driving.

Buick Regal Owner Manual - 2012

Black plate (46,1)

10-46

Vehicle Care

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 GM all-season tires can be identified by the last two characters of the TPC code, which will be “MS.” See Tire Sidewall Labeling on page 10‑47. 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 10‑46.

Winter Tires Consider installing winter tires on the vehicle if frequent driving on snow or ice covered roads is expected. All season tires provide good overall performance on most surfaces, but they may not offer the traction 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 changing to winter tires, be alert for changes in vehicle handling and braking.

See your dealer for details regarding winter tire availability and proper tire selection. Also, see Buying New Tires on page 10‑62. If using snow 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 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.

Buick Regal Owner Manual - 2012

Black plate (47,1)

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.

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 10‑46.

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.

Vehicle Care

10-47

See the “Tire Size” illustration later in this section for more detail. (B) TPC Spec (Tire Performance Criteria Specification): Original equipment tires designed to GM's specific tire performance criteria have a TPC specification code molded onto the sidewall. GM's TPC specifications meet or exceed all federal safety guidelines. (C) DOT (Department of Transportation): The Department of Transportation (DOT) code indicates that the tire is in compliance with the U.S. Department of Transportation Motor Vehicle Safety Standards.

Buick Regal Owner Manual - 2012

Black plate (48,1)

10-48

Vehicle Care

(D) 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. (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 10‑64.

(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 mi) 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 and gone flat. If the vehicle has a compact spare tire, see Compact Spare Tire on page 10‑93 and If a Tire Goes Flat on page 10‑68. (C) 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

Buick Regal Owner Manual - 2012

Black plate (49,1)

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. (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 10‑53. (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 is an example of a typical passenger vehicle tire size.

(A) Passenger (P‐Metric) Tire: The United States version of a metric tire sizing system.

Vehicle Care

10-49

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.

Buick Regal Owner Manual - 2012

Black plate (50,1)

10-50

Vehicle Care

(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 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 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 kPa (kilopascal) or psi (pounds per square inch) before a tire has built up heat from driving. See Tire Pressure on page 10‑53. 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.

Buick Regal Owner Manual - 2012

Black plate (51,1)

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 9‑12. GAWR FRT: Gross Axle Weight Rating for the front axle. See Vehicle Load Limits on page 9‑12.

GAWR RR: Gross Axle Weight Rating for the rear axle. See Vehicle Load Limits on page 9‑12. 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.

Vehicle Care

10-51

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 9‑12. Occupant Distribution: Designated seating positions.

Buick Regal Owner Manual - 2012

Black plate (52,1)

10-52

Vehicle Care

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 10‑53
andVehicle Load Limits on page 9‑12.

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 in) of tread remains. See When It Is Time for New Tires on page 10‑61. 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 10‑64.

Buick Regal Owner Manual - 2012

Black plate (53,1)

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 9‑12. 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 capacity weight and the original equipment tire size and recommended inflation pressure. See “Tire and Loading Information Label” under Vehicle Load Limits on page 9‑12.

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:

. Tire overloading and

overheating which could lead to a blowout.

. Premature or

irregular wear. . Poor handling. . Reduced fuel economy.

Vehicle Care

10-53

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 load carrying capacity.

Buick Regal Owner Manual - 2012

Black plate (54,1)

10-54

Vehicle Care

For additional information regarding how much weight the vehicle can carry, and an example of the Tire and Loading Information label, see Vehicle Load Limits on page 9‑12. 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 the tires once a month or more. Do not forget the compact spare tire, if the vehicle has one. The cold compact spare should be at 420 kPa (60 psi). For additional information regarding the compact spare tire, see Compact Spare Tire on page 10‑93.

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.

Re‐check the tire pressure with the tire gauge. Return the valve caps on the valve stems to prevent leaks and keep 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 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

(Continued)

Buick Regal Owner Manual - 2012

Black plate (55,1)

WARNING (Continued)

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 P235/50R18 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 P235/50R18 tire. Vehicles with P245/40R19 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 P245/40R19 tire. Return the tires to the recommended cold tire inflation pressure when high-speed driving has ended. See Vehicle Load Limits on page 9‑12 and Tire Pressure on page 10‑53.

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

Vehicle Care

10-55

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.

Buick Regal Owner Manual - 2012

Black plate (56,1)

10-56

Vehicle Care

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 10‑56 for additional information. Federal Communications Commission (FCC) Rules and with Industry Canada Standards See Radio Frequency Statement on page 13‑16 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 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 the low tire pressure warning light located on the instrument cluster.

Buick Regal Owner Manual - 2012

Black plate (57,1)

If the warning light comes on, stop as soon as possible and inflate the tires to the recommended pressure shown on the tire loading information label. See Vehicle Load Limits on page 9‑12. A message to check the pressure in a specific tire displays in the Driver Information Center (DIC). The low tire pressure warning light and the DIC warning message come on at each ignition cycle until the tires are inflated to the correct inflation pressure. Using the DIC, tire pressure levels can be viewed. For additional information and details about the DIC operation and displays see Driver Information Center (DIC) on page 5‑25. The low tire pressure warning light may come on in cool weather when the vehicle is first started, and then turn off as the vehicle is driven.

This could be an early indicator that the air pressure is getting low and needs to be inflated to the proper pressure. A Tire and Loading Information label, attached to your vehicle, shows the size of the original equipment tires and the correct inflation pressure for the tires when they are cold. See Vehicle Load Limits on page 9‑12, for an example of the Tire and Loading Information label and its location. Also see Tire Pressure on page 10‑53. The TPMS can warn about a low tire pressure condition but it does not replace normal tire maintenance. See Tire Inspection on page 10‑60, Tire Rotation on page 10‑60 and Tires on page 10‑45.

Vehicle Care

10-57

Notice: Tire sealant materials are not all the same. A non-approved tire sealant could damage the TPMS sensors. TPMS sensor damage caused by using an incorrect tire sealant is not covered by the vehicle warranty. Always use only the GM-approved tire sealant available through your dealer or included in the vehicle. 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 (With Pressure Relief Button) on page 10‑70 or Tire Sealant and Compressor Kit (With Pressure Deflation Button) on page 10‑77 for information regarding the inflator kit materials and instructions.

Buick Regal Owner Manual - 2012

Black plate (58,1)

10-58

Vehicle Care

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 also displays. The malfunction light and DIC warning message come on at