I just bought a 2004 Grand Prix GTP a few weeks ago and lately I've been having problems with the sun roof sticking when I tried to move it back. I did a bit of searching here and found out that a few people had good results cleaning out the old grease and putting white lithium in the tracks. I tried that and it seems to be a bit better, but it still sticks. I talked to the guy I bought it from and he said he just had a new switch installed on the sun roof so I'm pretty sure it's not that. Is there any chance someone has any tips on getting it to work, or maybe popping the sun roof out so I can do a more thorough cleaning?