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. ...

Vehicle Information Menu Items (with DIC Buttons)
(Vehicle Information): Press this button to scroll through the following menu items: ...

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 ...