Hi all new here and wanted some imput. Looking at a 2001 gmc 3500 duramax with about 70000 mi and wanted to know there biggest flaws as this was the first year for the duramax. I herd of injector problems but that was about it. Thanks
I have a 01 gmc. The other major issue with this truck is It will eventually throw a code p0093 (fuel leak LARGE). Many have fixed it by replacing the CP3 or high pressure pump. It's costly and difficult. Another fix is a tune from Kennedy Diesel. He programs with EFI Live, and can balance out the rates between what the computer demands, and what the pump creates. You are looking at $700.00 Minimum. It takes a while to have this problem with the truck. But IMO it's still a great engine. So between injectors and fuel pump, you can expect 2,000-4,000 bucks depending on the parts you put into it.
Not always. It could be leaking injectors, or the FPR on the CP3. But many times guys replace the Cp3 and Fpr at the same time. If you know someone with EFI Live or a tech II, they can see what it is usually.
I am not sure. Haven't heard of anyone doing that to check CP3. Usually you would get the readings of what kind of pressure the computer is demanding, and what pressure the pump is making. This is one of the hardest codes to crack.
Some have fixed it by replacing filters. Others by fixing fuel lines. And some replace the CP3, while again others need Injectors. I say best thing is start cheap. Check your filters, and fuel lines. then get the scanner on it if you go any further. It's worth the money to save the frustration.