2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 393

Controlling the vehicle is the key to successful off-road driving. One of the best ways to control the vehicle is to control the speed. At higher speeds: . Scanning the Terrain Off-road driving can take you over many different kinds of terrain. Be familiar with the terrain and its many different features. Surface Conditions: Off-roading surfaces can be hard-packed dirt, gravel, rocks, grass, sand, mud, snow, or ice. Each of these surfaces affects the vehicle's steering, acceleration, and braking in different ways. Depending on the surface, slipping, sliding, wheel spinning, delayed acceleration, poor traction, and longer braking distances can occur. Surface Obstacles: Unseen or hidden obstacles can be hazardous. A rock, log, hole, rut, or bump can startle you if you are not prepared for them. Often these obstacles are hidden by grass, bushes, snow, or even the rise and fall of the terrain itself. Some things to consider: ... You approach things faster and have less time to react. There is less time to scan the terrain for obstacles. The vehicle has more bounce when driving over obstacles. More braking distance is needed, especially on an unpaved surface. . . . { WARNING: When you are driving off-road, bouncing and quick changes in direction can easily throw you out of position. This could cause you to lose control and crash. So, whether you are driving on or off the road, you and your passengers should wear safety belts. Is the path ahead clear? Will the surface texture change abruptly up ahead? Does the travel take you uphill or downhill? Will you have to stop suddenly or change direction quickly? When driving over obstacles or rough terrain, keep a firm grip on the steering wheel. Ruts, troughs, or other surface features can jerk the wheel out of your hands. 5-17