2008 Pontiac Grand Prix Owner's Manual - Page 131

Reducing Speed While Using Cruise Control There are two ways to reduce the vehicle's speed while using cruise control: Using Cruise Control on Hills How well the cruise control will work on hills depends upon the vehicle's speed, its load, and the steepness of the hills. When going up steep hills, the accelerator pedal might have to be used in order to maintain the vehicle's speed. When going downhill, the brakes might have to be applied, or the transmission might have to be shifted to a lower gear to keep the vehicle's speed down. Doing either of these things will take the vehicle out of cruise. It may be better not to use the cruise control if the brakes constantly have to be applied, or the vehicle continuously needs to be shifted to a lower gear. • Press and hold the set button until you reach the lower speed desired, then release it. • To slow down in very small amounts, briefly press the set button. Each time this is done, the vehicle will slow down about one mph (1.6 km/h). Passing Another Vehicle While Using Cruise Control Use the accelerator pedal to increase the vehicle's speed. When you take your foot off the pedal, the vehicle will slow down to the cruise control speed set earlier. Ending Cruise Control There are two ways to turn off the cruise control: • Step lightly on the brake pedal. • Move the cruise control switch to off. Erasing Speed Memory The cruise control set speed memory is erased when the cruise control or the ignition is turned off. 3-15