hey guys, i'm hoping you can help me out with this problem. when i drive my truck with the windows rolled down i have this bad rattling noise on the inside of my driver side door. any ideas on what this could be? any fixes? thanks

 

maybe one or the window rails is loose my 99 V6 did the same thing

 

I would take the door panel off and chaeck for loose parts, then go for a ride with the window down and the door panel off. You should be able to find it that way.
Good luck and welcome to the interior rattles of GM trucks!

Jim

 

it's either the window cables clacking togethere or the door pannel pocket

mine did both till i zip tyed the cables tighter and screwed the door pocket in tighter (there is 1 screw in the bottom of the middle of the door pannel)