See also:

Rear Passenger Cupholders
Pull down on the lid to access the cupholders in the rear floor console. Vehicles with the rear seat armrest may also contain cupholders. Pull down the armrest to use the cupholders. ...

Rear Seats
Notice: Folding a rear seat with the safety belts still fastened may cause damage to the seat or the safety belts. Always unbuckle the safety belts and return them to their normal stowed pos ...

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. ...