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.
What I have replaced:
Water in the Fuel...
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...