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:

    Engine Overheating
    The vehicle has several indicators to warn of engine overheating. You will find an engine coolant temperature gauge on the vehicle's instrument panel cluster. See Engine Coolant Temperature Gauge . ...

    General Information
    Your vehicle is an important investment. This section describes the required maintenance for the vehicle. Follow this schedule to help protect against major repair expenses resulting from neglect ...

    Connecting and Controlling a USB Drive
    The infotainment system can only play back .mp3 and .wma files from a USB drive. Only the first 10,000 songs are recognized on the device. When a device is not supported, the message “No supported ...