GMC 2002 Yukon Denali Owner's Manual page 20

50/50 Split Bench Seat (Third Row)
If your vehicle has a 50/50 split bench, the seatback(s)
can be folded and the entire seat(s) tilted or removed
from the vehicle.
Folding the Seatbacks
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 seatbacks, do the following:
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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