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  1. 01-04.5 LB7 Duramax Powertrain
    2004 lb7 only 90,000 miles, dealer replaced injectors at 50,000 miles with the updated "improved" Bosch version. Now, 40,000 miles later I'm getting the dreaded light gray smoke at warm idle, after towing my 5th wheel down south for the winter. Balance rates are all within spec in both neutral...
  2. 01-04.5 LB7 Duramax Powertrain
    My truck (2002 LB7 Engine) has been smoking white since I purchased it. It doesn't have a hard start at any temperature, and it doesn't smoke until the engine reaches ~125F. At Idle it will smoke just enough to piss off the guy behind me, and accelerating from 0 it will smoke enough to leave a...
  3. 01-04.5 LB7 Duramax Powertrain
    Hello everyone. I know this has been discussed many times, but I can't find my specific issue. Truck is a 03 LB7 with 260k on it. I do the fuel filter religiously every oil change because of these pesky injectors. I have also had to replace the passenger side bank of injectors in the last 10k...
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