1998 GMC Sonoma Owner's Manual - Page 101

1 . Move.the cruise control switch to ON. 2. Get up to the speed you want. 3. Press in the SET button at the end of the lever and release it. Once you're going about 25 mph (40 km/h) or more, you can move the cruise control switch from ON to R/A for about a half a second. You'll go right back up to your chosen speed and stay there. 4. Take your foot off the accelerator pedal. Resuming a Set Speed Suppose you set your cruise control at a desired speed and then you apply the brake. This, of course, shuts off cruise control. But you don't need to reset it. Remember, if you hold the switch at R/A longer than a half a second, the vehicle will keep going faster until you release the switch or apply the brake. You could be startled and even lose control. So unless you want to go faster, don't hold the switch at R/A. 2-37