Chevrolet 2004 Corvette Owner's Manual page 102

6. To unlock the front of the roof panel, pull down
each of the front handles. Grasp the handles
with your fingers and pull each toward you.
Complete a 180° turn toward the center of the
vehicle. Then push up on each of the handles.
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7. To unlock the rear of the roof panel, press the latch
release button with your thumb and pull down the
latch lever with your fingers.
8. After releasing the latches, return the sun visors to
the forward position.