StabiliTrak® System
The vehicle has a traction control system that limits wheel spin, and the StabiliTrak system that assists with directional control of the vehicle in difficult driving conditions. Both systems turn on automatically every time the vehicle is started.
• To turn off traction control, press and release 
located on the instrument panel, and the appropriate DIC message displays. See Ride Control System Messages on page 5‑42.
• Press and release again to turn on the traction control system. The StabiliTrak system remains on.
For more information, see StabiliTrak® System on page 9‑30.
See also:
Coverage
Services are provided up to 5 years/160 000 km (100,000 mi), whichever comes first.
In the U.S., anyone driving the vehicle is covered. In Canada, a person driving the vehicle without permission from ...
Leaving After Parking on a Hill
1. Apply and hold the brake pedal.
2. Start the engine.
3. Shift into a gear.
4. Release the parking brake.
5. Let up on the brake pedal.
6. Drive slowly until the trailer is clear of the chocks. ...
Customer Assistance Offices (U.S. and Canada)
GMC encourages customers to call the toll-free number for assistance.
However, if a customer wishes to write or e-mail GMC, the letter should be addressed to:
United States
GMC Customer Assistance ...