Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
This code pretty much always means the EBTCM has failed, it is a common problem. I think rebuild was probably not done correctly, I would recommend getting a used EBTCM off a different vehicle. You can look on ebay and www.car-parts.com for a used module. You can verify it has good power/ground Key on, test the EBTCM power/grounds, using a head lamp as a load. The power feeds are pins: 17, 18 Red wires and 15, Black/Red wire. The grounds are pins: 16, 19 Black wires. Let me know if you have more questions or if there is anything else I can do to help. Thanks.
Correct, if those pins are good then that can only leave the EBTCM as problem. It is up to you if you want to see if company is able to fix EBTCM again, I just worry they won't and it will be more time wasted. You are correct, a new/used EBTCM will need to be reprogrammed which will cost around $60 to have done at dealer. Let me know if you have more questions, thanks.
The TCM should't cause this problem to begin with so I don't think it matters either way what TCM you are using. Let me know if you have more questions, thanks.
Poor connection or wiring problem on data wire could cause it but EBTCM is problem 99% of the time. Here is information on code from manual.