2007 Chevrolet Express Van Owner's Manual - Page 237

Pressing and holding the StabiliTrak® button located on the instrument panel for more than five seconds can turn off StabiliTrak® and part of the traction control system. It is recommended to leave the system on for normal driving conditions, but it may be necessary to turn the system off if your vehicle is stuck in sand, mud, ice or snow, and you want to "rock" your vehicle to attempt to free it. See If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow on page 258. StabiliTrak® System Operation The StabiliTrak® system is normally on, except when the system is initializing or has been disabled with the StabiliTrak® button. The StabiliTrak® system will automatically activate to assist the driver in maintaining vehicle directional control in most driving conditions. When activated, the StabiliTrak® system may reduce engine power to the wheels and apply braking to individual wheels as necessary to assist the driver with vehicle directional control. If your vehicle is in cruise control when the system activates, the StabiliTrak® indicator light on the instrument panel will flash, and the cruise control will automatically disengage. When the StabiliTrak® system is no longer active, you may re-engage the cruise control. See Cruise Control on page 151. 237 For your safety, the system can only be disabled when the vehicle speed is less than 20 mph (32 km/h). You will hear three chimes and the StabiliTrak® not ready light will come on. To turn on the StabiliTrak® system, press the StabiliTrak® button again. StabiliTrak® will automatically turn back on when the vehicle speed exceeds 20 mph (32 km/h). You will hear one chime and the StabiliTrak® not ready light will turn off. When the StabiliTrak® system has been turned off you may still hear system noises as a result of the brake-traction control coming on.