you must have cut wires inside the wiring harness between the trunk and body. open trunk and you will see a rubber cover for the wires on top. open it and repair the wires.
My Avalanche tailgate locks when I lock the 4 doors with the remote or door lock
Check fuses
i have a 1999 Chevy silverado and i do know that i had to take mine into dealer for replacement parts. check out the recalls for 1999-newer and they have the tailgate parts as recalled and will replace some of them for free, including free labor. hope that helps!
when you open the back door if you look where latch is you should be able to see a rectangle shape hole if you put your key in this and turn it you can activate/de activate the child locks
There is no latch. The fuel door locks/unlocks with the doors.
Is the remote's battery dead?
You can find keyless door locks for domestic properties at Go Keyless online. They sell remote dead bolt locks, remote door knob and remote lever handle locks. They are available to fit any decor in your home.
The relay functions are listed in your user manual. The BCM or Body Control Module may be your next problem to address if the relays and fuses check out. www.trailvoy.com
The battery in the remote needs to be replaced.
They were an available option.
replace door latch
If you open each of the back doors from outside , there is a selector switch for the childproof locks on the end of each door about 3 inches from the latch