So I bet it's a bit faux pas to cite another site here? But just for posterity today I worked on my mid and rear gates using these respective forums from another site; http://forums.trailvoy.com/showthread.p ... ?_k=c38ldw and http://forums.trailvoy.com/showthread.p ... ?_k=078k5d.
Good content and relevant information that aided in my repair of both gates. If I did my own write up I would delete a few things and add a few others, otherwise they were good resources.
Once the regulators were in and I recalibrated the rear gate I did a full functions test. Rear went up and down from the overhead, key at rear, and fob. The mid went up and down from the console and the roof slide open and closed as it's supposed to do. I also tested the tail gate with the right swing open and drop tail gate (like all the rest of the Trailblazers and Envoys; mine has two open functions) and it works wonderfully.
Now that I have restored full functionality to the Envoy I can work in convincing the wife to let me modify it and get off-road!
Edit: This also restored full functionality to the roof, the rear wipers (including the wiper sprayer), and rear window defroster.