hey my name is corey, i just recently bought a 2006 lbz duramax regular cab with 70,000 miles on it, im not sure where to post questions on this site and im sure someone might blast me for putting it here but here we go, truck is all stock but when its idling for 15-20 min and i take off it blows out white smoke, i checked the oil it don't smell like raw diesel, with 70,000 miles on a lbz could the injectors possibly be going out, im going to take it back to the dealer tomorrow to check the flow rate on them i just wanted to have idea what it might be for a lower mile lbz