Chevrolet 2003 Astro Owner's Manual page 15

5. Lift up on the left and the right seat release levers
at the same time. The latches are near the floor on
the rear legs of the seat.
6. Lift up on the rear of the seat to remove the seat
assembly from the rear latch pins. Then, pull back
and lift the seat out of the vehicle.
Your seat release latch lever is operated with
a two-stage mechanism. To fully release the
latch, two levels of lift effort will be required.
First, a low effort to overcome the first stage and
then a moderate effort to fully release the latch.
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