2012 GMC Acadia Owner's Manual - Page 282

9-28 Driving and Operating SERVICE STABILITRAK, the StabiliTrak light will come on and stay and four chimes are heard. If these conditions are observed, turn the vehicle off, wait 15 seconds, and then turn it back on again to reset the system. If any of these messages still appear on the Driver Information Center (DIC), the vehicle should be taken in for service. For more information on the DIC messages, see Ride Control System Messages on page 5‑40. Ride Control Systems StabiliTrak® System The vehicle has the StabiliTrak system which combines antilock brake, traction, and stability control systems and helps the driver maintain directional control of the vehicle in most driving conditions. When you first start the vehicle and begin to drive away, the system performs several diagnostic checks to ensure there are no problems. The system may be heard or felt while it is working. This is normal and does not mean there is a problem with the vehicle. The system should initialize before the vehicle reaches 32 km/h (20 mph). In some cases, it may take approximately 3.2 km (2 mi) of driving before the system initializes. If the system fails to turn on or activate, one of the following messages will be displayed on the Driver Information Center (DIC): SERVICE TRACTION CONTROL, The traction control button is located on the instrument panel. The traction control part of StabiliTrak can be turned off by pressing and releasing the traction control button. Traction control can be turned on by pressing and releasing the traction control button and the appropriate TRACTION CONTROL ON message will be displayed, if not automatically shut off for any other reason. The StabiliTrak light will flash on the instrument panel cluster when the system is both on and activated. The system may be heard or felt while it is working; this is normal. When the traction control system is turned off, the appropriate TRACTION CONTROL OFF message will be displayed on the DIC. The vehicle will still have brake-traction control when traction control is off, but will not be able to use the engine speed management