See also:

Universal Remote System Programming
If the vehicle has this feature, you will see these buttons with one LED indicator next to them in the overhead console. This system provides a way to replace up to three remote control t ...

Heated Mirrors
For vehicles with heated mirrors: (Rear Window Defogger): Press to heat the mirrors. See “Rear Window Defogger” under Automatic Climate Control System for more information. ...

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. ...