I have a 2006 ram 5.9. I spend winters on the Texas coast(sea level) and the summers in Gunnison CO (7700 ft asl). All is good at sea level but at 7700 ft I get serious black smoke just driving around...
X3 It only smokes from a dead stop when I nail it, and quits within a couple of seconds. Of course the turbo lag did that in stock form also. Must be a Chevy thing Larry! Does Madd's even make a tuner for a DMAX :H I never checked but maybe I suppose. The company is, are past Cummins guys from what I understand.