Charging System Light

The charging system light comes on briefly when the ignition is turned on, but the engine is not running, as a check to show the light is working. The light turns off when the engine is started. If it does not, have the vehicle serviced by your dealer. If the light stays on, or comes on while driving, there may be a problem with the electrical charging system. Have it checked by your dealer. Driving while this light is on could drain the battery.
When this light comes on, the Driver Information Center (DIC) also displays a message.
See Battery Voltage and Charging Messages on page 5‑26.
If a short distance must be driven with the light on, be sure to turn off all accessories, such as the radio and air conditioner.
See also:
Cooling System
If the vehicle has the Duramax® Diesel engine, see the Duramax® Diesel Supplement for more information.
The cooling system allows the engine to maintain the correct working temperature.
5.3 L En ...
Automatic Transmission
If the vehicle is a hybrid, see the hybrid supplement for more information.
Vehicles with an automatic transmission have an electronic shift position indicator within the instrument panel cluster. Th ...
Engine Cooling When Trailer Towing
The cooling system may temporarily overheat during severe operating conditions. See Engine Overheating on page 10‑18. ...





