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. ...

Electric Trailer Brake Control Wiring Provisions
These wiring provisions for an electric trailer brake controller are included with the vehicle as part of the trailer wiring package. The instrument panel contains blunt cut wires behind the steering ...

Sun Visors
Pull the sun visor down or unhook it and move it to the side to reduce glare. Visor Vanity Mirror Lift the cover to use the mirror and turn the lamps on. ...