GMC Chevrolet SSR 2003 Owner's Manual page 102

15. Insert the convertible top release tool into the latch
closing mechanism between the sun visors and turn
it counterclockwise until the roof latches are
secured and the convertible top is fully closed.
Then replace the plastic cap.
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16. From the upright position, push down on the outer
area of the boot cover panel where the hinges and
hydraulic cylinders are located to separate it
from the roof tonneau. Then, continue to push the
boot cover panel down as far as it will go.