Pontiac 2005 Montana Owner's Manual page 18

5. From behind the bench seat, pull the nylon strap at
the center of the base of the seat to release the
rear latches from the floor pins.
Do not let go of the strap until the seat is folded all
the way forward.
1-12
6. To unlatch the front latches, squeeze the angled
bar toward the straight crossbar.
7. Remove the seat by rocking it slightly forward,
then toward the rear of the vehicle and then
pulling it out.
Repeat these steps for the other section of the split
bench seat.