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:

    Setting the Tone(Bass/Midrange/Treble)
    AUDIO: Push and release the AUDIO knob until BASS, MID (midrange) (without Bose®), or TREB (treble) displays. Turn the knob to increase or to decrease the tone. The display shows the bass, midran ...

    Express Window Operation
    Windows with an express-up or down feature allow the front windows to be lowered or raised without holding the switch. Rear windows only have express-down. Pull a window switch up or push it ...

    Playing an MP3 CD-R Disc
    Your vehicle’s radio system may have the MP3 feature. If it has this feature, it is capable of playing an MP3 CD-R disc. For more information on how to play an MP3 CD-R disc. ...