2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 233

Resuming a Set Speed If the cruise control is set at a desired speed and then the brakes are applied, the cruise control is disengaged without erasing the set speed from memory. Once the vehicle speed reaches about 40 km/h (25 mph) or more, press the +RES button on the steering wheel. The vehicle returns to the previous set speed and stays there. Reducing Speed While Using Cruise Control If the cruise control system is already activated, . Press and hold the SET- button on the steering wheel until the desired lower speed is reached, then release it. To slow down in small amounts, press the SET- button on the steering wheel briefly. Each time this is done, the vehicle goes about 1.6 km/h (1 mph) slower. . Increasing Speed While Using Cruise Control If the cruise control system is already activated, . Press and hold the +RES button on the steering wheel until the desired speed is reached, then release it. To increase vehicle speed in small amounts, press the +RES button. Each time this is done, the vehicle goes about 1.6 km/h (1 mph) faster. Passing Another Vehicle While Using Cruise Control Use the accelerator pedal to increase the vehicle speed. When you take your foot off the pedal, the vehicle will slow down to the previous set cruise speed. . 4-9