I have a 2005 Suburban 1500 Z71 4WD

After doing some research I've come to ask for help.

Here are the facts as I know them:
1. The front doors OPEN and LOCK just fine with the FOB and the control panel button on the driver's door.
2. The passenger and driver's rear doors do NOT open with either the FOB or the control panel button on the driver's door.
3. The rear hatch does NOT open with either the FOB or the control panel button on the driver's door.
4. Unlocked "manually," the passenger and driver's rear doors do LOCK with either the FOB or the control panel button on the driver's door.

I read where it could be the relay located on the passenger's side B-Pillar. Found that relay and replaced it with a new one. Didn't help.
When unlocking the front doors, those locks are the ONLY locks I hear the actuators engaging.

What is my next recourse of action? I'm moving across country in the next few weeks and I need access to the rear of the vehicle. ANY help on how to fix these locks would be greatly appreciated!

Thanks Folks!

 

I'm going to leave this here as I resolved my issue.

In the fuse box next to the driver's door, there are two black rectangular relays next to each other. They are the LOCK and UNLOCK relays. Knowing the the problem was with unlocking, I took the LOCK relay and put it in the position of the unlock and it immediately worked. I then took the UNLOCK relay and put it in the lock relay position, and it worked. So, what fixed it was the unseating and re-seating the relay. As often what happens with electrical connections, they lose their continuity and it just needs to be restored.

So, if you find my symptom to be what you are experiencing, try taking your relays out and put them back in again.