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:
Warranty
OnStar equipment may be warranted as part of the new-vehicle limited warranty.
The manufacturer of the vehicle furnishes detailed warranty information. ...
Engine Overheating
The vehicle has several indicators to warn of engine overheating.
There is an engine coolant temperature gauge on the instrument panel cluster.
See Engine Coolant Temperature Gauge on page 5‑1 ...
Replacement Bulbs
For replacement bulbs not listed here, contact your dealer. ...