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:

    Dolly Towing (Front-Wheel&- Drive Vehicles)
    To tow the vehicle from the front with the rear wheels on the ground, do the following: 1. Put the front wheels on a dolly. 2. Move the shift lever to P (Park).. 3. Set the parking brake.. 4. ...

    Engine Coolant Heater
    The engine heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below −18°C (0°F). Vehicles with an engine heater should be plugged ...

    Passing
    More passing distance is needed when towing a trailer. The combination will not accelerate as quickly and is longer so it is necessary to go much farther beyond the passed vehicle before returning to ...