I don't seem to get on here much these days though I still drive my 61 GMC half ton, but again I find myself working on a friend's 62 half ton chev. this time he told me his glass wasn't staying rolled up good and he thought it needed new channels. I ordered a set and when I got the truck over here it seems they are in good shape having been replaced when it was restord. I found several bolts missing that hold the regulator assembly in the door.I'm hoping putting that back will fix it as I dread trying to get the wing window side out just to change what looks like good felt channels.it probably wouldn't help his problem. though the passenger side wing doesn't open and I may very well have to work on it