Well, I am not sure if I can be of much help or not, but here goes... I bought a 2001 Seville "Certified" (for all the good it did me)... Turns out my sunroof was aftermarket (Webasto-Solaire) and no one at the Cadillac dealership bothered to disclaim this little tidbit of info... Well, it was occassionally refusing to close a few months ago, Cadillac refused to fix it because it was an aftermarket part, I filed a small claims suit, long story short, they still couldn't (or wouldn't) fix it, but ended up paying to have it fixed. I did learn that the brain of the unit can be in one of two places... behind the sunroof (most) or above the driver's side sunvisor (mine)... either way it is under the headliner... Thus, since the brain and motor are both located under headliner, odds are the fuse will be under the headliner. Some installers put access panels in the headliner to allow work on sunroof components w/out dropping the headliner. If yours has no access panel, have run out of leads, and have a couple of hours on your hands, I would recommend dropping the headliner, finding the fuse (or disconnecting it) and checking to see if your battery will hold a charge.