Yeah I guess Suburban and Blazer are different.
Here is the motor. The plate is on over the gear in this picture, I put it back on so as to not lose anything.
I have a spare regulator that is cable driven, so I understand the difference.
I can get a picture of the regulator too, but I feel this is also a window motor...
How about this question instead "What window motor is this? LF, LR, RF, RR?"
And here it shows what I have, in the LMC catalog.
https://www.lmctruck.com/1973-91-che...nents-suburban