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:

    Exterior Lighting
    The exterior lamps control is located on the instrument panel to the left of the steering wheel. : Turns off the automatic headlamps and Daytime Running Lamps (DRL). Turn the headlamp control ...

    AM
    The range for most AM stations is greater than for FM, especially at night. The longer range can cause station frequencies to interfere with each other. For better radio reception, most AM radio stati ...

    The Inside
    SUV fans should find plenty of familiar goodies: a high seating position, excellent forward sightlines — albeit a hefty blind spot in back — and room to stretch out. I found our tester's leath ...