6.5L GM Diesel Oil Pressure Switch (OPS) Bypass Fuel Pump Relay Harness, 1995+

Description

Fuel pump harness upgrade for all 1995+ model year 6.5L GM diesels (
variant for 1992-1994 model years available here
). This upgrade modifies the fuel pump relay and oil pressure switch (OPS) circuit such that the OPS no longer carries the load of the fuel pump; the OPS will only carry a small load that energizes the relay coil. Those who install this product typically report:
Significantly quicker starts, even in the coldest conditions
Significantly increased oil pressure switch/sensor reliability and longevity
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.
System features include:
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 < 200 mA
Fuel pump load carried through heavy duty 40 amp relay
Assembled using OEM connectors
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.
Description:
6.5L GM diesel fuel pump relay harness upgrade
Part Number(s):
REID TEKK RT-250301-B
Applications/Compatibility:
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.
Features & Specs
•
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
Quantity:
(1) relay harness w/ required hardware and detailed installation manual
Condition:
New
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