1999 GMC Envoy Owner's Manual - Page 86

yellowblue If you are towing a trailer and you must park on a hill, see "Towing a Trailer" in the Index. That section shows what to do first to keep the trailer from moving. Shifting Into PARK (P) CAUTION: It can be dangerous to get out of your vehicle if the shift lever is not fully in PARK (P) with the parking brake firmly set. Your vehicle can roll. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure your vehicle won't move, even when you're on fairly level ground, use the steps that follow. Always put the shift lever fully in PARK (P) with the parking brake firmly set. If you're pulling a trailer, see "Towing a Trailer" in the Index. 1. Hold the brake pedal down with your right foot and set the parking brake. Pull the BRAKE RELEASE lever fully. It is located on the bottom of the driver's side of the instrument panel. NOTICE: Driving with the parking brake on can cause your rear brakes to overheat. You may have to replace them, and you could also damage other parts of your vehicle. 2-26