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:
Reclining Seatbacks
WARNING
Sitting in a reclined position when the vehicle is in motion can be dangerous. Even when buckled up, the safety belts cannot do their job when reclined like this.
The safety belt cannot prop ...
Using the “Digit Dial” Command
The digit dial command allows a phone number to be dialed by entering the digits one at a time.
After each digit is entered, the system repeats back the digit it heard followed by a tone.
If an unwa ...
Accessories and Modifications
Adding non-dealer accessories or making modifications to the vehicle can affect vehicle performance and safety, including such things as airbags, braking, stability, ride and handling, emissions syste ...