Chevrolet 2009 Uplander Owner's Manual page 16

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.
1-12
Reinstalling the Bucket Seats
CAUTION:
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A safety belt that is improperly routed, not properly
attached, or twisted will not provide the protection
needed in a crash. The person wearing the belt
could be seriously injured. After installing the seat,
always check to be sure that the safety belts are
properly routed and attached, and are not twisted.
Do not install the seat facing the rear of the vehicle, as
it will not lock into place. If more storage room is
needed behind the seat, slide the seat forward.