See also:

Safety Chains
You should always attach chains between your vehicle and your trailer. Cross the safety chains under the tongue of the trailer to help prevent the tongue from contacting the road if it becomes sep ...

Lock Doors
Press the customization button until LOCK DOORS: IN GEAR appears in the display. To select your preference for automatic locking, press the select button while LOCK DOORS: IN GEAR is displayed on ...

Roadside Assistance and OnStar
If you have an active OnStar subscription, press the Q button and the current GPS location will be sent to an OnStar Advisor who will assess your problem, contact Roadside Assistance, and relay y ...