2000 GMC Envoy Owner's Manual - Page 240

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 can slip off the jack and roll over you or other people. You and they could be badly injured. 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 PARK (P). 3. Be sure the transfer case is in a drive gear -- not in NEUTRAL. 4. Turn off the engine. 5. Put the wheel 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 of the vehicle, at the opposite end. The following steps will tell you how to use the jack and change a tire. Removing the Spare Tire and Tools The jacking equipment you'll need is stored along the driver's side inner rear quarter panel. Your vehicle is also equipped with work gloves and a plastic ground mat to assist in the changing of a flat tire. 5-20