Pontiac 2006 Montana SV6 Owner's Manual page 17

4. Release the rear set of hooks from the floor pins by
pulling either the nylon strap, located at the base of
the seat, or the release handle located on the side
of the seat. Use the strap to guide the seat forward.
5. To release the front seat hooks from the floor pins,
squeeze the angled bar, located beneath the seat
toward the straight crossbar.
6. Remove the seat by rocking it slightly forward, then
toward the rear of the vehicle while pulling it out.
This should be done in one motion.
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