Snowboss

Since this last recall on my 2014 Silverado I've had nothing but trouble with 4 wheel drive on my truck. I replaced the Transfer case, TC shift motor, and front shift motor. I still get the occasional service 4 wheel drive message. There are 15 diagnostic codes when I do a scan. They are not OBD codes and the MIL light is not on. The most serious of them are U0077-00 (chassis expansion buss off), and U0073 (communication Buss A off). I took it back to the dealer and they seem to think if it's not exploding then there is no problem. Another code say's (invalid data from the brake control module). I don't want to replace modules that are not faulty. I've spent enough money already. Any and all help and opinions would be greatly appreciated.

Since this last recall on my 2014 Silverado I've had nothing but trouble with 4 wheel drive on my truck. I replaced the Transfer case, TC shift motor, and front shift motor. I still get the occasional service 4 wheel drive message. There are 15 diagnostic codes when I do a scan. They are not OBD codes and the MIL light is not on. The most serious of them are U0077-00 (chassis expansion buss off), and U0073 (communication Buss A off). I took it back to the dealer and they seem to think if it's not exploding then there is no problem. Another code say's (invalid data from the brake control module). I don't want to replace modules that are not faulty. I've spent enough money already. Any and all help and opinions would be greatly appreciated.