GMC 2010 T-Series Owner's Manual page 75

Center Seat Storage
A storage compartment is located behind the seatback
in the center seat.
To access the compartment, you must first pull down on
the handle located on the passenger side to fold the
seat all the way forward. To open, squeeze both sides
of the latch.
Center Console Storage
There are additional storage areas for small items in the
center console to the right of the driver seat.
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