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 an Advisor can run a check., and an Advisor can run a check.

    See also:

    Increasing Speed While Using Cruise Control
    If the cruise control system is already activated, . Press and hold the +RES button on the steering wheel until the desired speed is reached, then release it. . To increase vehicle speed in small ...

    Cleaning Exterior Lamps/ Lenses and Emblems
    Use only lukewarm or cold water, a soft cloth, and a car washing soap to clean exterior lamps and lenses. Follow instructions under "Washing the Vehicle" later in this section. ...

    Battery
    Refer to the replacement number shown on the original battery label when a new battery is needed. See Engine Compartment Overview for battery location. WARNING Battery posts, terminals, and r ...