2015 Silverado 1500 4door, rear door driver side will not lock with auto door lock, doesn’t make a noise when lock/unlock buttons are pushed. I’m guessing a bad relay, does anyone know where the relays are located. Thanks
You’ll have to cross check this, but it may be the #40 fuse in the left instrument panel fuse block.
https://www.autogenius.info/chevrolet-silverado-mk3-third-generation-2014-2015-fuse-box-diagram/
I appreciate that, but I think #40 controls both left side doors, the front door locks and unlocks as it is supposed to. The back door won’t lock or unlock, and there is no indication that is trying to work. I have read there is a relay for each door, but I can’t find them. They are not in the fuse box under the hood, and I looked at a wiring diagram on line and it didn’t show anything pertaining to the doors.
your owner's manual shows you the location
I went through it and didn’t see it, but I will look again, thanks