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:

Answer Or Reject An Incoming Call — Call Currently In Progress
If a call is currently in progress and you have another incoming call, you will hear the same network tones for call waiting that you normally hear when using your mobile phone. Press the butto ...

To Play the AM/FMRadio
The ignition switch must be in the ACCESSORY (I) or ON (II) position. Turn the system on by pushing the power/volume knob or the AM/FM button. Adjust the volume by turning the power/volume kn ...

When does BLIS function
The system functions when your vehicle is moving at speeds above 6 mph (10 km/h). When you pass another vehicle: The system reacts when you pass another vehicle at a speed of up to 6 mph (10 km/ ...