A buddy of mine, just baught a brand new LMM 07' 3500 dualie, maybe 2 weeks after i baught mine and threw a programmer on it. maybe after about a week, the motor stopped getting oil and seized. (not to sure if it was the pump or what) but definatley a factory defect. they scanned the ECU or PCM not to sure what the LMM has but they found a burn left in the computer from the programmer. and voided his warranty. so now we have a 50,000$ truck sitting here and no motor. lesson learned of the day? buy factory computer, program the new one, and throw it in the truck. if u have any problems replaced the new one, with the original so there is no evidence of a programmer and the vin will still match up