See also:

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 ...

How to Add Coolant to the Coolant Surge Tank for Gasoline Engines
If the vehicle has a diesel engine, see “Cooling System” in the Duramax Diesel Supplement for the proper coolant fill procedure. WARNING You can be burned if you spill coolant on hot engine part ...

Engine Cooling System Messages
A/C OFF DUE TO HIGH ENGINE TEMP This message displays when the engine coolant becomes hotter than the normal operating temperature. To avoid added strain on a hot engine, the air conditioning com ...