Welcome to AF !
Heres alink with the disassembly of your 99 GA.
Disassembly of your 99+ GA's Interior
IF You need to replace the regulator which is bolted and riveted.
The rivets need drillled out and replaced with new ones.
Hopefully the window is just off track, though thier are little plastic clips that hold the window. If they are broken you will need to replace the regulator.