2013 Chevrolet Silverado 3500 HD Crew Cab Owner Manual - Page 329

Driving and Operating Reducing Speed While Using Cruise Control If the cruise control system is already activated, . 9-61 hills, pressing the accelerator pedal may be necessary to maintain vehicle speed. While going downhill: . 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. . Vehicles with a four speed automatic transmission may need to have the brakes applied or the transmission shifted to a lower gear to maintain driver selected speed. Vehicles with a six speed automatic transmission and a gasoline engine have Cruise Grade Braking to help maintain driver selected speed. Cruise Grade Braking is enabled when the vehicle is started and Cruise Control is active. It is not enabled in Range Selection Mode. It assists in maintaining driver selected speed when driving on downhill grades by using the engine and transmission to slow the vehicle. To disable and enable Cruise Grade Braking for the current ignition key cycle, press and hold the Tow/Haul button for three seconds. A DIC message displays. See Transmission Messages on page 5‑44. . . Vehicles with a diesel engine have Cruise Grade Braking enabled when Tow/Haul Mode is on, the exhaust brake is on, or both are on. 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. Using Cruise Control on Hills How well the cruise control works on hills depends on the vehicle speed, the load, and the steepness of the hills. When going up steep For other forms of Grade Braking, see Automatic Transmission on page 9‑33 andTow/Haul Mode on page 9‑38.