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:

    StabiliTrak® Indicator Light
    This warning light should come on briefly when the engine is started. During most driving conditions, this light will not come on. If the StabiliTrak® System is actively controlling the sta ...

    Passenger Safety BeltReminder Light
    Several seconds after the key is turned to RUN or START, a chime will sound for several seconds to remind the front passenger to buckle their safety belt. This would only occur if the passenger air ...

    Passenger Safety Belt Reminder Light
    Several seconds after the engine is started, a chime sounds for several seconds to remind the front passenger to buckle their safety belt. The passenger safety belt light, located on the instrum ...