The back door and window won't unlock on my Yukon with the automatic locks. Is there a fuse that we can check?

There is no separate fuse for power windows:
https://www.2carpros.com/questions/nissan-altima-2006-nissan-altima-windows-and-locks

https://oards.com/causes-of-power-windows-not-working/

How about a year, make, model????? Not all cars are the same

Check voltage at the 20amp locks fuse. If good, check voltage coming out of door unlock relay. One of the locks is likely pullig down the voltage due to partial short in solenoid coil.

Your solution is a front passenger door module (FPDM),before you replace it check for open fuse in the engine junction fuse box,I dont know the fuse number but it is a 25 amp fuse.

i had that problem. door lock button, back window unlock button, speakers in door and cigarette lighter didn't work. turns out cigarette lighter fuse was out. replaced and now all work. so check all fuses.

It sounds like you may a faulty door lock switch. If you pushed the switch to lock the doors and the switch stuck and kept door lock solenoids energized, that would drain the battery. It would also keep the door locks from unlocking, as to why window don't work it could all be on the same fuse or circuit breaker. Usually the power windows are on an automatic reset circuit breaker. Do you hear click and a short time later another click (with the battery charged)? If so that the circuit breaker tripping then resetting. Good luck!

if you can here relays when unlocking/locking check for power at door lock actuators inside doors, if you have power on lock/unlock and good earth from connector actuators are faulty.
if no power on test light when operating check output from central door lock module while operating, none coming out of module then it might need replacing.
check 30Amp power fuse for main relay under bonnet (which goes to pin 8 white/blue on module)and 10Amp gauge fuse in cab(pin 1 blue/red on module),pin 15 is also power when relay is on(red/blue) with test light, and module/ actuators.
check outputs from module pin 3 & 4
blue/red
blue/black
that go to door locks

Either the relay for the locks is bad or the fuse. When you push the power lock on the inside if the doors do not unlock then I would check the fuses, both inside and under the hood. If they do work then the relay/s may be bad. You are pushing your key button twice correct?

try taking your key phob and holding the unlock and lock button at the same time see what happens.

make sure than you have not split any fluids on the passenger front door most of the times is where the module to control the windows and doors is located, try by unpluging the batterie and the after a minute plug it back and see what happend but if any of your ft doors have been split with liquid or rain has gone inside then most likelly the module got moisture and not working