2003 GMC Envoy Owner's Manual - Page 136

Cruise Control -If you i ~ l your brakes, the cruise control will shut off. y e I (On): Move the switch to this position to turn the cruise control system on. Cruise control can be dan rous where you can't drive safely at a steady speed. So, don't use your cruise control on winding roads or in heavy traffic. Cruise control can be dangerous on slippery roads. On such roads, fast changes in tire traction can cause needless wheel spinning, and you could lose control. Don't use cruise control on slippery roads. 'r (Resume/Accelerate): Move the switch to this position to resume a set speed or to accelerate. ";3- (Set): Press this button, located at the end of the lever, to set a speed. the cruise control system off and cancels memory of a set speed. With cruise control, you can maintain a speed of about 25 mph (40 km/h) or more without keeping your foot on the accelerator. This can really help on long trips. Cruise control does not work at speeds below about 25 mph (40 km/h). 0(Off): This position turns If you leave yc-: cruise control on when you're not using cruise, you might hit a button and go into cruise when you don't want to. You could be startled and even lose control. Keep the cruise control switch off until you want to use cruise control. 3-11