2004 Hummer H2 Owner's Manual - Page 253

Brake and Throttle Operation Techniques for Off-Road Driving For logs, walls, rocks, severe ditches, hills, sand, etc. 1. Bring the vehicle to a complete stop. Do not overspeed the engine. 2. Select the proper transmission and transfer case gear range; usually FIRST (1) gear, 4LO LOCK for such obstacles. 3. If wheel spin is experienced, maintain steady throttle, with your foot off the brake pedal, to allow the TCS to control the wheel spin. TCS will not operate if the brakes are applied, even slightly. 4. If wheel spin can not be controlled by the system, fully press the brake pedal with your left foot so all wheel spin is halted. 5. Back away from the obstacle such that a new approach can be tried. 6. As the first wheel crosses the obstacle, be prepared to modulate the brake and throttle to maintain control and avoid tire drop-off from obstacles. Repeat the controlled process for the other wheels. For mounds, washouts, loose up-hill slopes, ditches, etc. 4-27