97 yukon back windows

Does anyone know or tried to remove the back door panel and see if the is something in place that prevents the back windows from going all the way down..Just asking before i rip into it......

Do your back windows go all the way down?? Mine go about a foot down and it sucks for the people in the back. Any way to make them go all the way down? I'm 25 and have no children so I'd like to make them go all the way down. Thanks

Guys,
If your 1997 is the same as mine I don't believe it is physically possible to roll them down any further. The way the door is made into the back wheel well it just won't happen.