Im doing conversion on a 1995 Suburban. Donor car is 2001 Silverado. I have the book "Duramax 6600 Conversions&Repower Projects"

My Suburban does not have an HVAC like in the book, I took all the wiring out behind dashboard (I want to keep the old dashboard), that included all heater wiring as well. Do I just have to compare two car wiring diagrams and search for right wires to connect to heater plugs?
I only left the wires, that came out from drivers door and went behind dashboard to passenger door. How did you get your power windows and central locking to work, I didn´t find anything from the book, how to connect them.

Margo, Estonia