GMC 2002 Yukon Denali Owner's Manual page 27

Tilting the Full Bench Seat
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.
CAUTION:
If the support rod isn't properly engaged, the
folded third row seat could come loose in a
sudden stop or crash. That could cause injury to
people and damage to your vehicle. Always be
sure the support rod is properly engaged when
the third row seat is folded forward.
1-20
1. Fold the seatbacks forward using the instructions
listed previously.
3. Lift the rear of the seat up from the floor and push
it forward. You will not be able to unlatch the seat
from the floor unless the seatback is folded down.
2. Unlatch the seat from
the floor by pulling up
on the lever labeled 2
located on the rear of
the seat.