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72 inch (6 ft) PMD Harness Extension

72 in Extension Harness for 6.5L GM Diesel PMD/FSD Relocation




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1994 - 2002 6.5L GM diesel (black PMD only)

Part Number:



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72" extension cable connects the original PMD/FSD electrical harness to a relocated PMD. The length of this extension permits a wide range of relocation options. This extension cable is compatible with all black PMD/FSD units; it will not work with gray PMDs.


The PMD (Pump Mounted Driver), also referred to in some instances as the FSD (Fuel System Driver), is the Achilles heel of the 6.5L GM diesel. As such, relocation of the PMD is quite common and relocating options are plentiful. This 72" harness permits PMD relocation into a variety of locations. The PMD/FSD is mounted to the driver side of the Stanadyne DS4 injection pump on turbocharged 6.5L GM diesels. A tremendous amount of heat is generated as it intensifies the signal from the powertrain control module to the fuel solenoid. During normal operation the flow of diesel is used as a coolant and, in theory, prevents the module from overheating. However, underhood temperatures and the heat generated by the engine itself often prevent proper cooling and cause the PMD to fail prematurely. Additionally, a "heat soak" effect occurs when a hot engine is shutdown and the temperature of the PMD can increase considerably beyond its design temperature, further contributing to a shortened service life and intermittent operation.


As a result of the inherent problems with the PMD/FSD location, it is common for 6.5L GM diesel owners to move the PMD to a more ideal location where a cooling effect is encouraged and the heat soak effect is either reduced of eliminated. Common relocation placements include the front bumper, near the battery box, against the firewall, or similarly isolated locations. We highly suggest researching various relocation options and their inherent advantages/disadvantages before making a final decision.


• 72 inch total length

• Made in China

Application Notes


1994 - 2002 Chevrolet Silverado 1500/2500/3500 (6.5L diesel)
1994 - 1999 Chevrolet Suburban/Tahoe (6.5L diesel)
1994 - 2002 GMC Sierra 1500/2500/3500 (6.5L diesel)
1994 - 1999 GMC Yukon (6.5L diesel)

Additional Details



Part Number:





1 year, unlimited mileage

Shipping Weight:

13 oz

Estimated Delivery:

3 - 5 business days

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