Increased fuel pump reliability and more consistent fuel pressure. While this harness upgrade does not eliminate the OPS altogether, it addresses all of the problems, faults, and failures in the factory fuel pump wiring on 6.5L GM diesels. Fuel pump powered by 12 AWG wires (compared to factory 18 AWG). Improved fuel pump ground and positive power feed circuitry. Reduces load on OPS contacts from 4 amps to.
Fuel pump load carried through heavy duty 40 amp relay. Most installs take roughly an hour and the harness is completely plug-and-play with the exception of driving 1 screw to mount the relay to the firewall. 6.5L GM diesel fuel pump relay harness upgrade. 1995 - 2002 model year Chevrolet/GMC vehicles with a 6.5L diesel (C/K trucks, Suburban, Tahoe, etc).Fits turbocharged and naturally aspirated engines. Does not fit Hummer or vans equipped with 6.5L diesel. Relay must be mounted to driver side firewall.
Power is supplied to the harness from an auxiliary power lug located at the fuse box near the driver side fender. Made in the USA w/ primarily USA materials. Feeds fuel pump with 12 AWG wires (vs factory 18 AWG). Utilizes OEM connectors for a perfect plug-and-play installation.
Reduces electrical load through oil pressure switch by over 90%. In many instances provides quicker starts, more consistent fuel pressure. Greatly reduces oil pressure sensor/switch related problems that so many 6.5L diesels suffer from.(1) relay harness w/ required hardware and detailed installation manual. The item "6.5L GM Diesel Oil Pressure Switch (OPS) Bypass Fuel Pump Relay Harness, 1995+" is in sale since Saturday, January 5, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Air Intake & Fuel Delivery\Fuel Inject. The seller is "dieselplyusa" and is located in Wilton, California. This item can be shipped worldwide.