I just had my truck in due to the service electronic throttle message that came up two weeks ago. I have a GDE ecm and they sent me an email telling me to return it to them for updating as it may throw a code for underboost. I never got around to doing that unfortunately and thats exactly what code it did throw. I had it towed to the dealer with the GDE and after diagnosing it they came up with a bad PCM. So, they replaced the PCM and flashed the TCM. Someone told me that we do not have a PCM and that the dealer commonly refers to the ECM as the PCM. Is this true?