GMC 2005 Safari Owner's Manual page 14

Removing the Rear Seats
To remove the rear bench seats, do the following:
1-8
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.
3. To store the safety belt while the second row bench
seat is removed, pull the belt out and put both
buckles in the passenger's side rear storage bin.
Route the belt out of the forward edge of the storage
bin. Close the cover to retain the belt.
4. Pull up on the seatback latch on the right rear of
the seat. Push the seatback down until it locks
into place.
2. If you have a safety
belt guide on your
seat, pull the safety belt
all the way out
through the guide.