Pontiac 2005 Montana SV6 Owner's Manual page 22

2. The seat can then be lifted off the front floor pins
and removed from the vehicle.
1-16
Replacing the Captain's Chairs
CAUTION:
{
If the seatback is not locked, it could move
forward in a sudden stop or crash. That could
cause injury to the person sitting there. Always
press rearward on the seatback to be sure it is
locked.
CAUTION:
{
A seat that is not 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.