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:
Disarming the System
To disarm the system, do one of the following:
Press on the RKE transmitter.
Approach the vehicle with the RKE transmitter (keyless access).
Start the engine.
The alarm automatically disar ...
Updating Station & Category Lists
If stations stored in the station list can no longer be received:
1. Turn the TUNE/MENU knob.
2. Select Update AM or FM Station List, if the stations stored in the station
list are no longer recei ...
Recommended Fuel
Use regular unleaded gasoline with
a posted octane rating of 87 or
higher. If the octane rating is less
than 87, an audible knocking noise,
commonly referred to as spark
knock, might be hear ...