Trying to remember back about 8 years ago when I replaced myone & only
window motor. I think my motor was riveted to the regulator.
I also remember having to get something in sync ( the glass & regulator
positioning ) upon reassembly because when I reassembled it the window
went half way up and the motor shut off. Went down fine.
Having a GM service manual helps.
05 Park Avenue
91 Bonneville LE, 303,383 miles