I have a 2003 2500HD with Duramax and Allison.I've added a 4" Magnaflow exhaust and K&N air filter. It runs great and no problems so far. But all this talk of injector failure in 01/02 models, and that perhaps 03 Duramax might be "down on power" has me wondering. Was the injector problem fixed for 03 models and is the power rating the same for this Duramax as previous years? Any problems out there anyone with 03 Duramax??