Let me try again...
There is NO interchange. It is NOT a door window motor.
LMC link shows a Sub tailgate window motor. Notice how it's not highlighted?
That means there is no interchange. Nothing replaces it except Sub tailgate window motor and drive.
If it was a door window motor, they'd sell you one in a heartbeat.
I'm not even going to bother with GM part numbers because there is only one.
Look up at ski-me's photos again.
That black rectangle box...that's the K5 motor. The Subs look the same as K5 motors but they can't be separated for replacement. Siiver one is what door motor units look like.
Undo those top 4 bolts off yours and the windings come out.
Sub tailgate replaces as entire unit. Just as door window motors replace as entire unit, which are completely different.
I've parted out over 150 Subs, Blazer and Jimmy in last 35 yrs. so this isn't first time I've had to explain this. Kinda like the Blazer and Sub tailgate glass isn't the same.