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:
Door Locks
WARNING
Unlocked doors can be dangerous.
• Passengers, especially children, can easily open the doors and fall out of a moving vehicle. When a door is locked, the handle will not open it. The chan ...
Tips and Troubleshooting Chart
Problem
Recommended Action
There is no power.
The ignition might not be turned to ON/RUN or ACC/ ACCESSORY.
The picture does not fill the screen. There are black bor ...
Engine Cooling When Trailer Towing
The cooling system may temporarily overheat during severe operating conditions.
See Engine Overheating on page 10‑20. ...