If I remember correctly, the seat back does not fold down. The bottom folds up.
In order to get the backseat to fold down in a 2004 Chevy Cavalier, you need to go through the trunk. There should be two straps, one on either side of the seats. Sometimes, these straps get pushed into the cracks, so be sure to look thoroughly. Pull either one of the straps to fold down the seat. The seats will fold down as one section. Some 2004 Chevy Cavaliers were shipped without the option to fold down the backseat, though the number is very few.
The back seat of a Chevy Cavalier is a split bench seat. The release for the seat is located in the trunk behind the split. Simply pull the release and fold the seat down.
There is a release to fold down the rear seats in the trunk of the car, They kinda hid it just under the upper lip of the trunk compartment, Just pull it back to release the seat.
I have a base model and my back seat can be removed but it does not fold down. With the LS model the back seat folds down. Just depends on your model.
there are two nylon handles in the top of the trunk, you pull one for left side one for right side.
I don't think it can
not sure about all years, but they do not in the 1999.
In the gas tank. If you fold down the backseat and lift up all the carpeting you may see an access hatch there to get at it, otherwise you have to drop your gastank.
There's a tab on each end of the backseat on the top (they are visible) pull upwards on both of them and pull the back seat towards you. There you go.
those were optional; open the trunk and look at rear of back seats; if you have a vertical split, you have fold-down seats, and heavy canvas-type finger grabs to fold the seat down at the top outside of each seat.
On Back of seats there is a plastic leaver, pull on leaver and push down seat.