On the professional vehicle, each wheel has eight wheel nuts.

Tighten the wheel nuts firmly in a criss-cross sequence as shown.

Caution: Incorrect wheel nuts or improperly tightened wheel nuts can cause the wheel to become loose and even come off. This could lead to an accident. Be sure to use the correct wheel nuts. If you have to replace them, be sure to get new GM original equipment wheel nuts. Stop somewhere as soon as you can and have the nuts tightened with a torque wrench to 100 lb-ft (140 N·m).

Notice: Improperly tightened wheel nuts can lead to brake pulsation and rotor damage. To avoid expensive brake repairs, evenly tighten the wheel nuts in the proper sequence and to the proper torque specification.

If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place. Turn on your hazard warning flashers.

Caution: Changing a tire can be dangerous. The vehicle can slip off the jack and roll over you or other people. You and they could be badly injured or even killed. Find a level place to change your tire. To help prevent the vehicle from moving:

1. Put the shift lever in PARK (P).
2. Set the parking brake firmly.
3. Turn off the engine and do not restart while the vehicle is raised.
4. Do not allow passengers to remain in the vehicle.

The following steps will tell you how to use the jack and change a tire.

The equipment you will need is in the trunk.

Instructions for changing your tires are on the inside of the tire cover located in your trunk.

To gain access to the instructions, spare tire and jacking equipment, do the following:

1. Press the area at the front of the handle located on the cover so that the back edge raises.



2. Grab the handle and remove the cover.



3. Unscrew the wing nuts to remove the container that holds the wrench and jack.
4. Remove the wheel wrench, jack and compact spare tire from the trunk. See Compact Spare Tire for more information about the compact spare tire.

The tools you will be using include the jack (A) and the wheel wrench (B).

1. Using the wheel wrench, loosen all the wheel nuts. Do not remove them yet.



2. Find the jacking location from the diagram above and corresponding hoisting notches located in the plastic molding. The front location is 9.0 inches (23 cm) from the rear edge of the front wheel well, and the rear location is 2.5 inches (7 cm) from the front edge of the rear wheel well.

Caution: Getting under a vehicle when it is jacked up is dangerous. If the vehicle slips off the jack you could be badly injured or killed. Never get under a vehicle when it is supported only by a jack.

Caution: Raising your vehicle with the jack improperly positioned can damage the vehicle and even make the vehicle fall. To help avoid personal injury and vehicle damage, be sure to fit the jack lift head into the proper location before raising the vehicle.

3. Turn the jack handle counterclockwise to lower the jack lift head until the jack fits under the vehicle.
4. Raise the jack until the metal flange fits firmly into the channel of the jack head.
5. Put the compact spare tire near you.



6. Raise the vehicle by turning the jack handle clockwise. Raise the vehicle far enough off the ground for the compact spare tire to fit under the vehicle.
7. Remove all wheel nuts and take off the flat tire.




Remove any rust or dirt from the wheel bolts, mounting surfaces and spare wheel.

Caution: Rust or dirt on a wheel or other parts to which it is fastened, can make the wheel nuts become loose and eventually the wheel could come off and cause a crash. Always remove all rust and dirt from wheels and other parts.

Caution: Never use oil or grease on bolts or nuts because the nuts might come loose. The vehicle's wheel could fall off, causing a crash.




8. Place the compact spare tire on the wheel-mounting surface.



9. Reinstall the wheel nuts with the rounded end of the nuts toward the wheel. Tighten each nut by hand until the wheel is held against the hub.



10. Lower the vehicle by turning the jack handle counterclockwise. Lower the jack completely.




Tighten the wheel nuts firmly in a crisscross sequence as shown.

11. Screw on the wheel nut covers with your fingers, then tighten one-quarter turn with the wheel wrench.

Caution: Incorrect or improperly tightened wheel nuts can cause the wheel to come loose and even come off. This could lead to a crash. If you have to replace them, be sure to get new original equipment wheel nuts. Stop somewhere as soon as you can and have the nuts tightened with a torque wrench to the proper torque specification. See Capacities and Specifications for wheel nut torque specification.

Notice: Improperly tightened wheel nuts can lead to brake pulsation and rotor damage. To avoid expensive brake repairs, evenly tighten the wheel nuts in the proper sequence and to the proper torque specification. See Capacities and Specifications for the wheel nut torque specification.

Do not try to put a wheel cover on your compact spare tire. It will not fit. Store the wheel cover and lug nut caps in the trunk until you have the flat tire repaired or replaced.

Notice: Wheel covers will not fit on your vehicle's compact spare. If you try to put a wheel cover on the compact spare, the cover or the spare could be damaged.

Caution: Storing a jack, a tire, or other equipment in the passenger compartment of the vehicle could cause injury. In a sudden stop or collision, loose equipment could strike someone. Store all these in the proper place.

After you have put the compact spare tire on your vehicle, you will need to store the flat tire in your trunk.

Store the flat tire as far forward in the trunk as possible. Store the jack and wheel wrench in their compartment in the trunk. For storage, the jack must be raised until the screw end is flush with the edge of the jack.

Caution: Storing a jack, a tire, or other equipment in the passenger compartment of the vehicle could cause injury. In a sudden stop or collision, loose equipment could strike someone. Store all these in the proper place.

The compact spare is for temporary use only. Replace the compact spare tire with a full-size tire as soon as you can. See the storage instructions label to replace your compact spare into your trunk properly.

1. Wrench

2. Jack

3. Jack Container

4. Retainer and Washer

5. Spare Tire Cover