2013 Silverado doors won’t lock from either panel but lock when put in gear

[Tonufun]

My son just bought a 2013 Silverado crew cab. It has an aftermarket alarm & fob that doesn’t work. No factory fob. The doors will not lock by pushing the switch on the driver or passenger door. They all 4 lock when the truck is put in gear. I found a blown fuse associated with the door lock & replaced it but they still don’t work (now I forget which fuse it was & none have blown again).

I attempted to get a new fob & spare keys but they won’t program - assuming it’s because the doors won’t lock?

[swathdiver]

3 hours ago, Tonufun said:

My son just bought a 2013 Silverado crew cab. It has an aftermarket alarm & fob that doesn’t work. No factory fob. The doors will not lock by pushing the switch on the driver or passenger door. They all 4 lock when the truck is put in gear. I found a blown fuse associated with the door lock & replaced it but they still don’t work (now I forget which fuse it was & none have blown again).

I attempted to get a new fob & spare keys but they won’t program - assuming it’s because the doors won’t lock?

It is likely that the RCDLR Remote Control Door Lock Receiver needs replacing and programming.  But before you go throwing parts at it, find someone with a Tech-2 to pull the internal BCM codes that are certainly in there because it's not working right.  Each module for each door could be faulty as well and only a used one with the same options will work as the new ones must also be programmed to your truck.