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:

    Range Selection Mode
    Range Selection Mode The Range Selection Mode switch, if equipped, is located on the shift lever. To enable the Range Selection feature: 1. Move the column shift lever to the M(Manual) position ...

    Retained Accessory Power (RAP)
    These vehicle accessories can be used for up to 10 minutes after the ignition key is turned off: • Audio System • Power Windows • Sunroof (if equipped) Power to the windows and sunroof will ...

    Exterior
    While GM is trying to differentiate the Silverado and Sierra, the common silhouette is hard to overcome, even with unique front fenders, grille, bumpers, headlamps, cargo box and taillamps. There' ...