un fortunately the only thing you can possibly do is remove the motor and slide the glass forward, but it will take a little work accessing the motor, that is the only way. good luck. i hope i helped and please accept my answer. thanks T-MAN
Important: The sunroof motor/actuator cannot be reused if this procedure is followed.
The allen head screw is accessible with the sunroof motor/actuator in place.
You may need to apply a significant amount of force to move the sunroof actuator with the allen wrench.
Caution: Do not attempt to repair or alter the head impact energy-absorbing material glued to the headliner or to the garnish trims. If the material is damaged, replace the headliner and/or the garnish trim. Failure to do so could result in personal injury.
On the Cavalier remove enough of the I/P carrier to route the dome lamp wire harness (6) through the opening along the windshield pillar. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gages, and Console.