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 operate if the battery is discharged or disconnected.
See also:
Recommended Fuel
Use premium unleaded gasoline with a posted octane rating of 91 or higher. You
can also use regular unleaded gasoline rated at 87 octane or higher, but the vehicle's
acceleration could be slig ...
Torque Lock
If you are parking on a hill and you do not shift the transmission into P (Park)
properly, the weight of the vehicle can put too much force on the parking pawl in
the transmission. It might be dif ...
Traction Control Operation
TCS is part of the StabiliTrak system. Traction control limits wheel spin by
reducing engine power to the wheels (engine speed management) and by applying brakes
to each individual wheel (brake-tr ...