2000 GMC Safari Owner's Manual - Page 23

Replacing the Rear Seats D Pull the seat down to latch the rear retainers. Make D Lower the seat into position. Make sure the front retainers are hooked onto the anchor pins. sure the seat is locked in by pulling up and down on the seat. CAUTION: A seat that isn't locked into place properly can move around in a collision or sudden stop. People in the vehicle could be injured. Be sure to lock the seat into place properly when installing it. 1-11