Thanks to TennTechMan for your info on programming ECM . I have a 2004 MH with the V10. I purchased a OttoMind tuner that was programmed for my ECM. I read the instructions and freaked out when it said to ensure "stock" tune is in the ECM before the installation. After reading your advice on checking to see if there is a chip installed in the ECM first, was the info I have been searching for. While it will not be an easy task, it is worth the trouble. The ECM is tucked under the dash board and hard to get to. I'm hoping no one put a chip into it. If I do find a chip plugged in, will the removal of it put everything back to "stock" tune? At least now I can look forward to loading program. Thanks for your info, regards Jimbo in Calgary.