2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 234

Using Cruise Control on Hills How well the cruise control will work on hills depends upon the vehicle speed, load, and the steepness of the hills. When going up steep hills, you might have to step on the accelerator pedal to maintain the vehicle speed. When going downhill, you might have to brake or shift to a lower gear to keep the vehicle speed down. When the brakes are applied the cruise control is disengaged. Exterior Lamps The exterior lamps control is located on the instrument panel to the left of the steering wheel. Ending Cruise Control There are three ways to end cruise control: . It controls the following systems: ... To disengage cruise control; step lightly on the brake pedal. Press Headlamps Taillamps Parking Lamps License Plate Lamps Instrument Panel Lights . . [ on the steering wheel. I on the To turn off the cruise control, press steering wheel. . . Erasing Speed Memory The cruise control set speed is erased from memory by pressing the I button or if the ignition is turned off. The exterior lamps control has four positions: O (Off): Turns off the automatic headlamps and daytime running lamps (DRL). Turn the headlamp control to the off position again to turn the automatic headlamps or DRL back on. For vehicles first sold in Canada, the off position will only work when the vehicle is shifted into P (Park). 4-10