.....it can be aggravating if the window channel is new or the glass is cut a little off so take your time and use good reasoning. Don't tighten up the wing vent assembly until you get the big side window in all the tracks. Getting the wing vent and glass in can be a little tricky for some....some go in easy. For me I pulled that cotton picking vent assembly about 6 times for various reasons and finally got to where I could just "drop it in".
*** I had problems with the size of my glass and a window channel being waaay to tight. But they work good now!!
Note: if you have a shop manual it describes it pretty well. If you do not have a shop manual you can look at the ones Keith Hardy has put on line.
http://chevy.oldcarmanualproject.com/
