Help with Rear and Hatch Door locks - won't unlock with FOB or Door button

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Roy M S

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I am driving a 2003 Tahoe. Recently I started having issues with the remote and manual locks. I currently can open the two front doors with the FOB and the door lock button, I can lock all the doors as well. The rear doors will not unlock with either the FOB and drivers door lock button. This started in the winter, then all of a sudden the doors started to work and unlock with both FOB and Door control, this lasted a month and has gone back to not working. It is really trying since the hatch does not have a key for a manual open, so it can't be opened at all in this state.

Note that sometimes the FOB doesn't work for the front doors, but that is only occasionally.

Is this a wiring issue? In the door? Moisture issue? Fuse?

Any help is appreciated.
 

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