See also:

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

Satellite Radio
Vehicles with an XM™ Satellite Radio tuner and a valid XM Satellite Radio subscription can receive XM programming. ...

Customer Satisfaction Procedure (Mexico)
Did you get the Warranty Extension Plan? This plan is recommended by General Motors to supplement the warranty included with the new vehicle purchase. See your dealer for details. Customer Assis ...