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. ...

Add-On Electrical Equipment
Notice: Do not add anything electrical to the vehicle unless you check with your dealer first. Some electrical equipment can damage the vehicle and the damage would not be covered by the vehicle&# ...

Lower Anchor and Top Tether Anchor Locations
Regular Cab — Two-Passenger Front Seat Regular Cab — Three-Passenger Front Seat (Top Tether Anchor): Seating positions with top tether anchors. Do not install a child restraint in the ce ...