Pontiac 2001 Firebird Owner's Manual page 139

NOTICE:
The convertible top may be tight when pushing
forward on the latch when your vehicle is new,
but it will loosen up with time. Make sure that
the hooks are properly aligned before using any
kind of force.
If your vehicle has a power loss, such as a dead battery,
you can still raise or lower the top manually by turning
the valve in the driver's side of the trunk area.
1. Open the hatch and find the tab located along the left
side trim panel.
2. Lift up the tab and turn the valve counterclockwise
to release the hydraulic pressure.
3. Turn the ignition key to LOCK.
You can now raise or lower your top manually. Be sure
to close the valve after installing your top so you can
raise or lower it electrically later.
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