GMC 2002 Yukon XL Owner's Manual page 24

Full Bench Seat (Third Row)
If your vehicle has a full bench seat, the seatback can
be folded and the seat can be tilted or removed from
the vehicle.
Folding the Seatback
CAUTION:
If the seatback isn't locked, it could move forward
in a sudden stop or crash. That could cause injury
to the person sitting there. Always press rearward
on the seatback to be sure it is locked.
To fold the seatback on the bench seat, do the following:
2. To return the seat to an upright position, pull up
on the release lever labeled 1 and then pull up on
the seatback until the seatback locks into the
upright position.
Push and pull on the seatback to check that it is locked
into place.
1. Pull up on the release
lever, labeled 1, located
on the rear of the
seatback and push the
seatback forward.
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