GMC 1997 Safari Owner's Manual page 17

Removing the Rear Seats
To
remove the rear seats, do the following:
TO DETACH
BELTFOR
\
I
SEAT REMOVAL
\
1. If you are removing the
center seat, remove the
right lap-shoulder belt.
To do this, press the tip
of a key into the release
hole of the safety belt
attachment while pulling
up on the safety belt.
2. If you have a safety belt
guide on your seat, pull
the safety belt all the way
out through the guide.
3. Pull up on the seatback latch on the right rear of the
front seat. Push the seatback down until it locks in
place (non-touring bench seats only).