How do you let the back seat down - 2006 Chrysler Pacifica

The back seat of the Impala can only be folded down if your vehicle is the particular fold-down version, otherwise, it'll have to be removed entirely to gain access to the massive available space.
To remove the seat, follow these steps:
• Push down on the bottom cushion of the back seat.
• Pull-on the T handles which are under the front edge of the seat, to release the bottom cushion
• Remove the cushion
• Unwind the nuts and bolts on the bottom part of the back seat. Then lift it, and it would be released from its position.
• Now, remove the seat from the back and you can access the trunk.

what model and type?

Fold Down Back seats in DC TundraTalk net Toyota Tundra Discussion Forum
follow this link as seems you need to have a part fitted for the rear seat to fold down

To fold down, follow these steps:
1. There is a loop located in the middle of the back seat - pull it forward and the bottom part of the rear seat will fold down
2. Wedge the the back seat, and it should not give you any trouble in folding down
3. To ensure that the seat goes all the way down- remove the headrest.
If your seat can not be folded-down, follow these steps to remove it:
1. Put some pressure on the bottom cushion of the back seat.
2. To release the bottom seat, pull the T handles, and then remove the cushion
3. There will be some bolts and screws on the bottom of the seat - remove them, and then you can pull out the seat.

Look at the seats where the back meets the seat itself. Between the seal belt belts, you should see two nylon loops. Just pull those loops and the seat bottoms will fold up against the back of the front seats. Then the seat backs just fold down. Remember to take the headrests out of the seat backs - you'll find storage for them on the up side on the seat bottoms.

The rear seat backs do not fold down in these trucks, the seat bottom lifts up to gain access to the compartments below but the seat back does not fold down. The only thing you can do is physically remove the rear seats.

Open the back trunk, look near the top of the trunk, and pull the two black levers. They have a seat folding down symbol. That will release the locks to fold the back seat down.

the rear seat dosent flip down in this model just the small opening behind the arm rest opens . to allow you to ccarry snow skis and such.

in the middle of the seat cushions in the back of the seat there is a little loop, pull that loop forward and that will have the seat's bottom pulled down to the floor agains the back of the front seats. Next simply apply a lil muscle to the back of the back seats and the seats should fold down nicely into the open space. Be sure to remove the headrests so the seat will fold all the way down. post any issues u may have.

There should be a loop between the seat and backrest, pull that and the seat will pull toward the front seats. After that, pull the lever located at the outside of the backrest. This lever is on the outside of the seat by the door-side of the seat. Pull that up and allow the backrest will fold down and the headrest will pivot back and your seat is folded down.