GMC Troubleshooting Questions? Ask a Mechanic for Answers
You have no power on the orange wire that goes to the RR door switch and the RF door control module? This is a pretty substantially sized wire, bigger than the others.
The doors are on circuit breakers, not on fuses. If you have no power, you'll have to get to the circuit breaker and see if it's closed. I am adding a schematic so you can see how this works.
I'm sorry, I had to leave yesterday afternoon. Did you get this worked out yet?