See also:

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 sta ...

Keyless Trunk/Liftgate Opening
Press the trunk/liftgate release button located above the license plate to open the trunk/liftgate if the keyless access transmitter is within range. See Trunk (Sedan, Coupe) for additional ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...