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:
Remote Keyless Entry (RKE) System
See Radio Frequency Statement on page 13‑22 for information regarding Part 15 of the Federal Communications Commission (FCC) rules and Industry Canada Standards RSS-GEN/210/220/310.
If there is ...
Erasing Speed Memory
The cruise control set speed is erased from memory by pressing or if the
ignition is turned off. ...
Horn
To sound the horn, press the center pad on the steering wheel. ...