Pontiac Montana SV6 2007 Owner's Manual page 22

Folding or Reclining the Seatbacks
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 push and pull on
the seatback to be sure it is locked.
22
To recline the seatback, lift up on the recliner
lever located on the outboard side of the seat,
then move the seatback to the desired position.
To raise the seatback, lift up on the recliner lever
without applying pressure to the seatback. Push
and pull on the seatback to make sure it is locked
in place.
Notice: Folding a rear seat with the safety belts
still fastened may cause damage to the seat or
the safety belts. Always unbuckle the safety
belts and return them to their normal stowed
position before folding a rear seat.