Underbody Maintenance

Chemicals used for ice and snow removal and dust control can collect on the underbody. If these are not removed, corrosion and rust can develop on the underbody parts such as fuel lines, frame, floor pan, and exhaust system even though they have corrosion protection.

At least every spring, flush these materials from the underbody with plain water. Clean any areas where mud and debris can collect. Dirt packed in close areas of the frame should be loosened before being flushed. Your dealer or an underbody car washing system can do this.

    See also:

    Fog Lamps
    To turn on the fog lamps, the ignition and the headlamps or parking lamps must be on. If the fog lamps are turned on while the exterior lamp switch is in the AUTO position, the headlamps come on ...

    Security
    OnStar provides services like Stolen Vehicle Assistance, Remote Ignition Block, and Roadside Assistance, if the vehicle is equipped with these services. OnStar can unlock the vehicle doors r ...

    Infotainment System Menus
    Tone Settings To access the tone settings, press the Home Page Tone button or the TONE button on the faceplate. Use the tone settings to adjust the following features: • Setting the tone â ...