Chevrolet 2003 Venture Owner's Manual page 26

You can also lift the lever on the side of the seat to
release the rear latches from the floor pins.
Do not let go of the strap or lever until the seat is
folded all the way forward.
4.
To unlatch the front latches, with the seat folded
forward, squeeze the angled bar toward the
straight crossbar.
5. Remove the seat by rocking it slightly forward, then
toward the rear of the vehicle and then pulling it
out. This should be done in one motion.
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