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:
Center Console Storage
For vehicles with a center console storage, use the lever (A) on the front to
open. ...
Radio(s)
VOL/ : Press to turn the system
on and off. Turn to increase or decrease the volume.
SOURCE: Press to choose between FM, AM, XM™, if equipped, CD, or AUX.
MENU/SEL: Turn to select radio station ...
Reclining the Seatbacks
To recline the seatback:
1. Leaning forward in the seat, pull the reclining seatback strap (B).
2. Move the seatback to the desired position, and then release the strap to lock the seatback in place ...