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:
Glass Replacement
If the windshield or front side glass must be replaced, see your dealer to determine
the correct replacement glass. ...
Torque Lock
Torque lock is when the weight of the vehicle puts too much force on the
parking pawl in the transmission. This happens when parking on a hill and
shifting the transmission into P (Park) is not done ...
Setting the Clock
The navigation system time and the analog clock operate independently. Changing
the time through the navigation system does not change the time on the analog clock.
See Clock to change ...