2003 GMC Sierra 1500 Pickup Owner's Manual - Page 166

Setting Cruise Control If you leave your cruise control on when you're not using cruise, you might hit a button and go into cruise when you don't want to. You could be startled and even lose control. Keep the cruise control switch off until you want to use cruise control. 1. Move the cruise control switch to on. 2. Get up to the speed you want. The cruise light on the instrument panel will illuminate when the cruise control is engaged. Resuming a §et Speed Suppose you set your cruise control at a desired speed and then you apply the brake or press the clutch pedal (if equipped). This, of course, disengages the cruise control. But you don't need to reset it. Once you're going about 25 mph (40 km/h) or more, you can move the cruise control switch from on to resume/accelerate briefly. you'll go right back up to your chosen speed and stay there. 3. Press in the set button at the end of the lever and release it. 4. Take your foot off the accelerator pedal. If you hold the switch at resume/accelerate briefly, the vehicle will keep going faster until you release the switch or apply the brake. So unless you want to go faster, don't hold the switch at resume/accelerate. 3-1 1