Door lock inversion module and headlamp control module

[Th8nos]

I'm having a very difficult time trying to find the door lock inversion module and headlamp control module for a 99 Yukon Denali. I have all the wiring diagrams and the location on where it "should" be but I see nothing. To start off with I've done the obs swap and I think I moved too quick on some key components. I've done engine trans ecm harness for under the the. Dash plus harness BCM steering column for the inside. Junked the donor only to realize I left connector c305 in it. Now I'm not getting any communication from the OBD2 port (got power), no crank or start in park but it turns over in neutral still no start though. I know I messed up along the way and could use any and all help to get going before the year out