2006 GMC Envoy Owner's Manual - Page 297

Remember: ABS does not change the time you need to get your foot up to the brake pedal or always decrease stopping distance. If you get too close to the vehicle in front of you, you will not have time to apply your brakes if that vehicle suddenly slows or stops. Always leave enough room up ahead to stop, even though you have ABS. StabiliTrak® System Your vehicle is equipped with StabiliTrak®, Electronic Stability Control (ESC) which combines antilock brake, traction and stability control systems and helps the driver maintain directional control of the vehicle in most driving conditions. Traction control activates when the controller senses wheel spin. StabiliTrak® will selectively apply the brakes and reduce engine torque to help regain traction. Stability control activates when the controller senses a discrepancy between your intended path and the direction the vehicle is travelling. StabiliTrak® selectively applies braking pressure at any one of the vehicle's brakes to help guide the vehicle in the direction which you are steering. When you first start your vehicle and begin to drive away, the system performs several diagnostic checks to insure there are no problems. You may hear or feel the system working. This is normal and does not mean there is a problem with your vehicle. If driving conditions delay system initialization, the STABILITRAK NOT READY message may be displayed. If this is the case, your vehicle does not need servicing. For more information on the stability messages, see DIC Warnings and Messages on page 3-54. Using ABS Do not pump the brakes. Just hold the brake pedal down firmly and let anti-lock work for you. You may feel the brakes vibrate, or you may notice some noise, but this is normal. Braking in Emergencies With ABS, you can steer and brake at the same time. In many emergencies, steering can help you more than even the very best braking. Locking Rear Axle If your vehicle has this feature, your locking rear axle can give you additional traction on snow, mud, ice, sand or gravel. It works like a standard axle most of the time, but when one of the rear wheels has no traction and the other does, this feature will allow the wheel with traction to move the vehicle. 4-9