Nice write up.

Sorry to be one of

those guys

(still my favorite emotiocons

)
But I'll add the following:
I got mine from O'reilly. $50 cheaper than dealer($150) and direct replacement gauranteed for life.(we'll see) About the same as the before mentioned $100.
I have NEVER done this before and used Chilton's(I fell yours is better they say remove window) GM guy (over the phone) and parts guy both said tape window also apply white lithium grease on the tracks. AFTER it's installed.
If you do it BEFORE please have a friend shoot video and post it back on here.
Two tips/tricks I found was if the light feels stubborn PRIOR to lifting out,un do the bolt on the under side of door remove pocket and reach in and unplug.(mine was swelled and never removed.)
If the tweeter wire is on too short of a leash(I can't remember) now is the time to splice an extension(if you want) then after you pop the controls out you simply reach in and un plug.
Again I have NEVER done this before. For you who are "iffy" on doing this follow daddys write up. With the panel removed and the part and tools near by WITH snapping a pic of the new AND a smoke break I had it installed and the whole door back together and working in under 45 minutes.
DISCONNECT battery BEFORE doing this.
I "thought" I could do it without untill (the seemingly un movable taped window that didn't roll down without the fucking tape and whole reason for replacing this started coming down

)