It does not interchange with door motors.
What ski-me said is correct.
They are self contained drive motor that spin a cable. Always have been.
What you have done is unbolted the transmission gear NOT the motor from the regulator. Follow the cable and you'll find the motor.
Edit:
You left out part it's a Suburban. Had to guess that from your sig.
No they still don't interchange with the doors.
https://www.oreillyauto.com/detail/b...ow+motor&pos=0