Yep, if you boys had real trucks, you know the one with a RAM logo you would likely be running Bully Dog tuner. Hah! On serious note @WV64Signet selecting a tuner is actually kind of a big deal. The one you for sure don’t want is any tuner that claims to do all brands. Tuners are fundamentally brand specific (overall) to a point. lots of claims other wise but it has been my experience the Diablo run great for Fords and the Bully dog run great on Dodge. No experience on Chevy? Do they even make a Diesel pickup? Dunno?