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  1. Duramax First Generation: 2001-2004 (LB7)
    03 GMC 2500HD LB7 Problem: Lack of acceleration/ lack of power, sometimes will go into a lope idle (like a tractor). If I clear the codes the lope idle will go away. Codes: P0103 P0101 P2227 P2228 P0181 What I have replaced: fuel filter BAR Sensor MAF Sensor Air Filter Water in the Fuel...
  2. Duramax First Generation: 2001-2004 (LB7)
    I am having the same problem. its an 03, I rebuilt the engine a couple months ago. Truck runs great besides 4.5 gallons of oil. I sent the injectors out for flow testing and to make sure they were not cracked. New feed lines, new return lines, new banjo bolts and washers for return lines...
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