1998 GMC Suburban Owner's Manual - Page 117

Increasing Speed While UsingCruise Control There are twoways to go to a higher speed: 0 Passing Another Vehicle While Using Cruise Control Use the accelerator pedal to increase your speed. When you take your foot off the pedal, your vehicle will slow down to the cruise control speed you set earlier. Use the accelerator pedal to get to the higher speed. Push the SET button at the end of the lever, then release the button and the accelerator pedal. You'll now cruise at the higher speed. Move the cruise control switch from ON to R/A. Hold it there until YOLI get up to the speed you want, and then release the switch.(To increase your speed in very small amounts, move the switch to R/A for less than half a second. Each time you do this, your vehicle will go about I mph (1.6 km/h) faster.) Using Cruise Controlon Hills How well your cruise control will work on hills depends upon YOLIPspeed, load and the steepness of the hills. When going up steep hills, you may have to step on the accelerator pedal to maintain your speed. If the steepness of the hill causes the vehicle speed to drop more than 15 mph (24 km/h) below the set speed, your cruise control will automatically disengage. When going downhill, you may have to brake or shift to a lower gear to keep your speed down. Of course, applying the brake takes you out of cruise control. Many drivers find this to be too much trouble and don't use cruise control on steep hills. 0 Reducing Speed While Using Cruise Control There are two ways to reduce your speed while using cruise control: Push i n the SET button at the end of the lever until YOLIreach the lower speed you want, then release it. 0 To slow down in very small amounts, push the button for less than half a second. Each time you do this, you'll go I mph (1.6 kndh) slower. 2-39