Reactivation for Subsequent Owners
Push 
and follow the prompts to speak to an Advisor as soon as possible after acquiring the vehicle.
The Advisor will update vehicle records and will explain the OnStar service offers and options available.
See also:
How to Check
Use a good quality pocket-type gauge to check tire pressure. Proper tire inflation
cannot be determined by looking at the tire. Check the tire inflation pressure when
the tires are cold, meaning t ...
Universal Remote System Programming
Vehicles with the Universal Remote System will have these buttons located in the headliner.
This system provides a way to replace up to three remote control transmitters used to activate devices su ...
Ending a Call
Press to end a call. ...