Hey guys I just replaced both both window motors and the passenger side headlight motor. I would really recomend this site http://shbox.com/page/windowmotor.html and i know every has seen this site posted before. The only thing about the sites information that is not correct is the bolt number instead of a number 8X3/8 or 1/2 use a number 6X3/8 or 1/2. Im not sure if this is for the lt1's but for the ls1 im pretty sure its right. I have a 2000 WS6 Trans Am. Also you dont not have to worry about the door speakres when you lift up the door panel. And start taking the door panel off by the left bottom side on the drivers side for the passenger side it is the opposite it is the bottom right side. As for as how long it takes i would say about 2hrs and I did it in the rain. After you drill out the rivets it is really easy. The headlight motor is also an easy installation. I forgot the sites name but they have a video on how exactly to take it off and put it back on. Thank you to this site http://shbox.com/page/windowmotor.html for all of the help. Hope this might help you. PS I used a piece of wood to hold up the window...... And I will try to find that video.......