Thank you very much for the information. Customer bringing me vehicle back tonight to install another part. I will try to locate this module, check it for bad connection or corrosion, clear code, then hopefully I can program the Fobs. Thanks again

You may find this a valuable tool.

OK, found module. The next issue is, how much voltage is supposed to be on the CAN Dark green wire? There are 3 wires, Red-12V, Blk-Grd, Dark green, right now it has the same voltage as the Red?? I have checked both those wires for being shorted to each other, and they are not. I can disconnect BCM, all voltage gone on both. It was my understanding that a CAN line was always a low voltage. I have searched AC Delco TDS, and cannot find what voltage is supposed to be?? I have another module to put it, just don't want to fry it. Any help would be appreciated.

You may like to start here.

BTW the can bus is a low voltage signal of about 3.5 volts and should not have battery volts ever.

Appreciate this valuable information. That is exactly what I thought. There is a good possibility of a bad BCM, cause when I disconnect it, the voltage drops to 0V. Customer bringing car back tomorrow, I will continue to diagnose Monday morning. I will post repair. once I am done.