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There is no aux bcm, mine does the same thing when queried, it may have been some special option at some point or only apply's to some kind of special optional equipment, who knows.We can add EBCM communication failure to this list, which doesn't surprise me. I'm hoping that these are somehow tied to the auxiliary BCM, although searching that query has been less than useful thus far.
a used bcm is not expensive, it's just a mild headache but if you throw a used one in there and program it then it's at least less hassle than chasing wires.The BCM would affect all of these, but I'm hesitant to suspect it outright when everything else works... It's a complex system, but I can't help but feel that it's something specific to the wheel speed/hall sensors.
What's frustrating is that those should populate an error other than a failure to communicate, which is what makes me think you're right on the money with the BCM.
I don't have those, thankfully; it's a moderately optioned LT, I added front heated seats myself but they're a simple relay/switched setup and didn't rely on any other systems.a used bcm is not expensive, it's just a mild headache but if you throw a used one in there and program it then it's at least less hassle than chasing wires.
I see in your photos it has no communication with the rear hatch, memory seat, heated seat, etc, so either you don't have any of those? or there is a serious problem