GMC YUKON 2018 Owner's Manual page 72

The seatback will fold forward
to create a flat load floor.
If the seatback cannot fold flat,
try moving the front seat
forward and/or put the front
seatback in the upright
position.
3. Lift the lever again to release
the rear of the seat from the
floor. The seat will tumble
forward.
4. The rear pull strap can also be
used to fold or fold and tumble
the seat. It is easier to tumble
the seat with the rear pull strap
once the seat is folded flat.
Seats and Restraints
Folding and Tumbling the Seat
from the Third Row Seat
Warning
Using the third row seating
position while the second row is
folded, or folded and tumbled,
could cause injury in a sudden
stop or crash. Be sure to return
the seat to the passenger seating
position. Push and pull on the
seat to make sure it is locked into
place.
To fold and tumble the seat from the
third row seat:
1. Make sure that there is nothing
under, in front of, or on
the seat.
71