2007 GMC Yukon Owner's Manual - Page 348

StabiliTrak® System Your vehicle may be equipped with 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 your vehicle and begin to drive away, the system performs several diagnostic checks to ensure 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. The system should initialize before the vehicle reaches 20 mph (32 km/h). In some cases, it may take approximately two miles of driving before the system initializes. If the system fails to turn on or activate, the StabiliTrak® light along with one of the following messages will be displayed on the Driver Information Center (DIC) (TRACTION CONTROL OFF, SERVICE TRACTION CONTROL, STABILITRAK OFF, SERVICE STABILITRAK). For 2500 series vehicles, if the vehicle has gone through heavy acceleration or braking during the first 2 miles (3.2 km) after starting your vehicle, these messages may also appear. 348 For 1500 series vehicles, if these DIC messages appear, make sure the StabiliTrack® system has not been turned off, then turn the steering wheel through either the ten or two o'clock positions. If this does not clear the message(s), take your vehicle to the dealer for service. If this is the case, your vehicle does not need servicing. Turn your vehicle off and back on again to reset the system. If any of these messages appear on the Driver Information Center (DIC), and your vehicle hasn't gone through hard acceleration or braking in the first two miles, your vehicle should be taken in for service. For more information on the DIC messages, see Driver Information Center (DIC) on page 244. The StabiliTrak® light will flash on the instrument panel cluster when the system is both on and activated. You may also feel or hear the system working; this is normal.