Well, we'd need to know exactly what's wrong with it in order to answer the question. Replacing the motor and replacing cracked glass are going to be two wholly separate processes.
There could be a problem with the power of common ground to the Cavalier light and sun roof. Check the fuses and wiring for the problem.
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The fuse of the sunroof on a 2001 Chevy Cavalier is found in the interior fuse box. It is labeled as the CRSY LP fuse and is rated at 15 amps.
John F. Kennedy is often attributed to saying, "The time to repair the roof is when the sun is shining." This quote emphasizes the importance of taking action in advance and being prepared for challenges before they arise.
blah blah yes
roof scoop or sun roof
If the spots are only thru the clear coat the entire roof should be carefully finesse sanded and then reapply clear coat as directed by manufacture.
Sun roof
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no <><><> The first car did not have a roof at all.
The sun roof came first. When cars and hot rods were first invented, people came up with the idea of making a hole in the roof. The term moon roof wasn't made until the '70s by Ford.