GM Service Manual Online
For 1990-2009 cars only

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

Caution: Changing a tire can be dangerous. The vehicle can slip off the jack and roll over or fall on 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. Set the parking brake firmly.
  2. Put the shift lever in P (Park).
  3. If you have a four-wheel-drive vehicle, be sure the transfer case is in a drive gear - not in N (Neutral).
  4. Turn off the engine and do not restart while the vehicle is raised.
  5. Do not allow passengers to remain in the vehicle.
To be even more certain the vehicle will not move, put blocks at the front and rear of the tire farthest away from the one being changed. That would be the tire on the other side, at the opposite end of the vehicle.

When the vehicle has a flat tire, the wheel blocks need to be set up before changing it. The wheel blocks are located in the tool bag in the swing-gate for H3 models or below the rear seat for H3T models. See Removing the Spare Tire and Tools for more information.


Object Number: 2042434  Size: G1

To use the wheel blocks, lift the wheel block and lock it into place.

Use the following example as a guide to assist in the placement of the wheel blocks (A) when the vehicle has a flat tire (B).


Object Number: 2062605  Size: G1
  1. Wheel Block

  2. Flat Tire

The following information explains how to use the jack and change a tire.