Diesel Fuel Injector Pump Driver Relocation Kit
What Is a Diesel Fuel Injector Pump Driver Relocation Kit?
If you own a 1994–2002 GM truck or van equipped with a 6.5L diesel engine, you may already be familiar with the notorious Pump-Mounted Driver — or PMD. The pump-mounted driver (PMD) is an electronic switch that controls the fuel solenoid on the injection pump. On the Stanadyne DS4 electronic fuel injection pump found in these vehicles, the OE PMD module is mounted directly to the fuel injection pump itself. This seemingly minor design decision creates two significant problems for diesel owners and technicians.
The first is a heat problem. The location on the fuel injection pump subjects the PMD to excessive heat — a known cause of failure for this high-wear component. The second is an access problem: if the PMD needs to be serviced or replaced, a technician must reach the fuel injection pump, which is an extremely time-consuming and labor-intensive repair.
A Diesel Fuel Injector Pump Driver Relocation Kit solves both issues at once. By moving the PMD to a remote location away from the pump, these kits allow increased airflow around the module to keep it cooler and dramatically extend its service life. They also make future PMD service far easier — no longer requiring access to the pump itself. A complete relocation kit typically includes a new PMD module, a relocation harness, a heat sink or cooler plate, and all necessary mounting hardware.
Why This Repair Matters
A failing PMD can cause a wide range of drivability symptoms in 6.5L diesel-powered GM vehicles, including hard starts, stalling, and complete no-start conditions. Because heat is the primary culprit, simply replacing the module without addressing the root cause — its proximity to the injection pump — leads to repeated failures. A relocation kit is widely considered both a repair and a preventative modification, making it one of the most recommended fixes in the 6.5L diesel community.
Installing the kit proactively when servicing the fuel injection pump can save significant time and money down the road, turning what would otherwise be a multi-hour repair into a straightforward module swap.
Top Brands for Diesel Fuel Injector Pump Driver Relocation Kits
GB Remanufacturing is a family-owned, California-based company that has been a market leader in premium diesel fuel injection products since 1986. With deep expertise across diesel electronics and fuel system components, GB Reman brings the same precision and quality standards to its relocation kit offering — including a PMD cooler plate, harness extension, and mounting hardware — that it applies to its full line of remanufactured injectors and pumps.
Dorman is a century-old aftermarket innovator known for engineering solutions that save time and reduce repair complexity. Dorman's PMD Relocation Kit is designed as a direct-fit replacement that matches the original components required to relocate the pump driver module, and it is backed by rigorous OEM-standard testing — making it a trusted choice for professional technicians and DIYers alike.