I have a 2018 chevy Duramax. I bought a modified ECM and tried to swap it out with the stock ECM and broke 2 of the 3 connectors. Had it towed to the dealership and they said GM does not make just the connectors so they want to charge me an astronomical amount to get it taken care of. Is the dealer trying to get over on me or is this legit? With my limited knowledge of whats going on I probably shouldn't have attempted this in the first place but its too late now. If anyone has any info, that would be great. I appreciate it!