[hugger6933]

I just rebuilt a couple months ago a 99GMC Z71 3 door. I removed the whole INT and most of the dash to get out the headliner wiring for some reason it was on the wrong side of a bracket. Either that one was wrong or they found the mistake cause I didnt have to take any other year that far to get out the headliner. But to answer your question, yes there is a big open spot from say 8 inches below the quarter window to almost the floor where you can in there and bang around if needed. My truck had a little more damage to the quarter than I wanted to deal with so I replaced the whole panel with a new OE. Surprisingly they had some in Lansing MI being a one year only part I figured no chance but I ordered one and it got lost and they reordered I got a couple days later. And it wasn't very expensive like $328 or something like that. Good luck with yours. Jim