See also:

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 ...

Exterior Lamps Off Reminder
A warning chime sounds if the driver door is opened while the ignition is off and the exterior lamps are on. ...

Airbag Readiness Light
This light shows if there is an electrical problem. The system check includes the airbag sensor, the pretensioners, the airbag modules, the wiring, and the crash sensing and diagnostic module. For mo ...