2008 Hummer H3 Alpha Owner's Manual - Page 146

Cruise control will not work if your parking brake is set, or if the master cylinder brake fluid level is low. If you apply your brakes, the cruise control shuts off. Setting Cruise Control {CAUTION: If you leave your cruise control on when you are not using cruise, you might hit a button and go into cruise when you do not want to. You could be startled and even lose control. Keep the cruise control switch off until you want to use cruise control. {CAUTION: Cruise control can be dangerous where you cannot drive safely at a steady speed. So, do not use your cruise control on winding roads or in heavy traffic. Cruise control can be dangerous on slippery roads. On such roads, fast changes in tire traction can cause excessive wheel slip, and you could lose control. Do not use cruise control on slippery roads. The cruise control disengages, if the vehicle has the Traction Control System (TCS) and it begins to limit wheel spin. See Traction Control System (TCS) on page 4-5. When road conditions allow you to safely use it again, you can turn cruise control back on. 1. Move the cruise control switch to on. 2. Get up to the speed desired. 3. Press in the set button at the end of the lever and release it. 4. Take your foot off the accelerator pedal. The cruise symbol on the instrument panel comes on when the cruise control is engaged. 3-12