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 vehicle is equipped with the Tire Pressure Monitoring System. If a diagnostics check is needed between e-mails, push OnStar Additional Information , and an Advisor can run a check.

    See also:

    Playing the Radio
    PWR (Power): Press this knob to turn the system on and off. VOL (Volume): Turn this knob clockwise or counterclockwise to increase or to decrease the volume. DISPL (Display): When the ig ...

    Engine Coolant (3.9L Engine)
    The cooling system in the vehicle is filled with DEX-COOL® engine coolant. This coolant is designed to remain in the vehicle for five years or 150,000 miles (240 000 km), whichever occurs first ...

    Keys
    WARNING Leaving children in a vehicle with the ignition key is dangerous for many reasons. Children or others could be badly injured or even killed. They could operate the power windows or othe ...