See also:

Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not o ...

At Least Once a Month
Tire Inflation Check Visually inspect your vehicle’s tires and make sure they are inflated to the correct pressures. Do not forget to check the spare tire. Tire Wear Inspection Tire rotation ...

Seat Cushion Tilt Feature
If available, move the lever up or down to raise or lower the front of the seat cushion. ...