Chevrolet abs light, airbag light, daytime running lights always ON
ABS light, Airbag light, Daytime running lights always ON Chevrolet BCM Issue sure sounds like a loss of communication between the control modules. the tough part, the system is like the old christmas tree lights. if one of the modules go down, it can pull down the hole data stream. same goes with the serial data line. what is really needed to help isolate this problem is a GM tech 2 scan tool. if there is no way to get your hands on one of these tools, the only other option you have is, check each control module power and grounds. to make sure the wiring is good. next step would be to check the serial data line for any opens or shorts. I have even seen a control module pull down the system. any one of the control modules could cause this. and they are all quite pricey. just had a thought, I have seen ground G110, which is the ground for the abs and 4wd modules cause a problem. there is some ground wires mounted on the left frame rail, just below the drivers door. ma...