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 v ...

Transferring Service

Push to request account transfer eligibility information. The Advisor can assist in canceling or removing account information. If OnStar receives information that vehicle ownership has changed, ...

See also:

Trailer electrical connection
Connect only approved electrical circuits, which are in good condition, to the trailer socket. The vehicle connector provides a 5 amp output which must not be exceeded. An accessory harness ki ...

Ignition switch
- Never turn the ignition switch to “LOCK” while the vehicle is being driven or towed because that will lock the steering wheel, preventing steering control. And when the engine is t ...

Headlights
Headlights To turn on the headlights, turn the knob on the end of the turn signal lever. first position Instrument panel illumination, tail lights, front side marker lights and license ...