See also:

Radiator Pressure Cap
Notice: If the pressure cap is not tightly installed, coolant loss and possible engine damage may occur. Be sure the cap is properly and tightly secured. ...

Hazard Warning Flashers
The hazard warning flashers let you warn others that you have a problem. The hazard warning flasher button is located in the center of the instrument panel above the radio. : Press to make the ...

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 ...