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A very common failure of the 6.5L GM Turbo Diesels was in their Stanadyne DS4 injection pump. The most common reason for this failure is due to the failure of the PMD (Pump Mounted Driver), which is also sometimes called the FSD (Fuel Solenoid Driver). The pumps that we offer utilize a newer style PMD designed and built by Flight Systems that typically eliminates the overheating and failure issues of the original style PMD.
WARRANTY 1 Year UNLIMITED Mileage
- ManufacturerFlight Systems Diesel Components
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Hi I have a 2002 GMC savana school bus the part I am replacing is a stanadyne ds4831-5521 I just need to know that this is in fact going to be the replacement part I'm looking for. I know that in the description it says direct replacement for DS4831-5521S but my tag is missing the ""S""?
What what I can tell, this pump is not compatible with the non S models.