| Duane,
I think you're getting some good advice on the smoke issue. When my injector did go out, I first noticed it by seeing some puffs of black smoke while running down the road. When it completely failed, it was due to injector stuck open dumping fuel into the cylinder (and spewing clouds of black smoke).
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'01 2500HD Duramax LB7, Xtra cab - short box
w/ 8' Blizzard Plow, otherwise bone stock |