Chevrolet VENTURE 2004 Owner's Manual page 20

If the front latches are not attaching correctly, check
that the seat is in the full rear position.
3. Firmly push the rear hooks onto the rear floor pins
by pushing down on the rear of the seat.
4. Try to raise the seat to check that it is locked down.
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5. Lift the seatback recliner lever or pull the nylon
strap on the back of the seat and raise the
seatback until it locks upright.
6. Push and pull on the seatback to check that it is
locked.
7. If you have the 40/60 seat, attach the mini-buckle
so that the safety belt is ready for use when a
passenger uses the seat.
The buckle reattaches by pushing the latch into the
buckle until the red center pops out again.
Repeat these steps for the other section of the split
bench seat.