2006 Pontiac Grand Prix Owner's Manual - Page 272

To limit wheel spin, especially in slippery road conditions, the ETS should always be left on. But the system can be turned off. The system should be turned off if the vehicle ever gets stuck in sand, mud, or snow and rocking the vehicle is required. See Rocking Your Vehicle to Get It Out on page 4-33 and If Your Vehicle is Stuck in Sand, Mud, Ice or Snow on page 4-32 for more information. Press the traction control button located on the console to turn the system off. StabiliTrak® Plus System The vehicle may have a vehicle stability enhancement system called StabiliTrak® Plus. It is an advanced computer controlled system that assists with directional control of the vehicle in difficult driving conditions. StabiliTrak® Plus comes on whenever the vehicle is started. It activates when the computer senses a discrepancy between the intended path and the direction the vehicle is actually traveling. StabiliTrak® Plus selectively applies braking pressure at any one of the vehicle's brakes to help control the vehicle in the steering direction. This symbol, along with the STABILITY CONTROL ACTIVE message comes on the Driver Information Center (DIC). If the system is limiting wheel spin when the button is pressed, the system will turn off instantly. Press the traction control button again to turn the system on. See DIC Warnings and Messages on page 3-72. You may also hear a noise or feel vibration in the brake pedal. This is normal. Continue to steer the vehicle in the desired direction. 4-12