Chevy 2500 HD - ECM update?
Hi everyone. I have a 2500 HD that is 1.5 years old. I do all of my own maintenance, and have never taken the truck back to the dealer. I read on another post that Ford may update the ECM on their Sup...
Forum Discussion
If you REALLY want an "upgrade" to you ECM there are more than a few aftermarket tuners available, though most are for more HP/TQ and some claim doing so will give better MPG.
