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  1. Duramax First Generation: 2001-2004 (LB7)
    So it has a coolant loss problem. Started at 213000 miles. Looses 1/2 to 3/4 gallon a day on a long haul from AZ to VA. Some gets in the oil but not much. Had the coolant system checked and it held for 3 days. Replaced the water pump, oil cooler, injector cups. Work done by Done Right Diesel. I...
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