1998 GMC Savana Van Owner's Manual - Page 224

Changing a Flat Tire 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 cause an injury. The vehicle you can slipoff the jack and roll over or other people. You and they could be badly injured. To Find a level place to change your tire. help prevent thevehicle from moving: 1. Set the parking brake firmly. 2. Put the shift lever in PARK (P). 3. Turn off the engine. To be even more certain the vehicle won't move, you can putblocks at the front and rear the of tire farthest away from the one changed. being That would be the tire on the other sidethe of vehicle, at the opposite end. - The following steps will tellyou how to use the jack and change a tire. 5-22