Fuel pump module assembly E3967M For 1998-1999 Chevrolet C1500 C2500 K1500 K2500 Suburban/GMC C1500 C2500 K1500 K2500

Extended cranking, low measured fuel pressure, hesitation under load, intermittent stalling, pressure that drops after shutdown, or an inaccurate fuel gauge can indicate an in-tank module fault after the fuse, relay, voltage supply, ground, wiring, and fuel lines have been tested. This E3967M replacement module is intended for specified 1998–1999 Chevrolet and GMC C1500, C2500, K1500, and K2500 Suburban applications with the 5.7L V8 or listed 7.4L V8 configuration. Confirm module code GFN, engine, drive series, emissions equipment, OE number, connector and pressure-sensor arrangement, fuel ports, flange, module height, and float-arm geometry before ordering.

Fuel Pump Module Fitment for C/K Suburban

Verified coverage includes selected 1998–1999 Chevrolet and GMC C1500, C2500, and K1500 Suburban 5.7L applications, plus specified K2500 Suburban 5.7L or 7.4L applications. Module-code GFN is a critical fitment identifier. Some catalogs additionally restrict individual applications by emissions or harness configuration, so model and engine alone are not sufficient.

Fitment Verification

• Confirm a specified 1998–1999 Chevrolet or GMC C/K Suburban with the listed 5.7L or 7.4L V8 application.
• Verify module code GFN and match E3967M, MU1748, MU152, FG0092, P74773M, SP6152M, 19177231, 25314341, or 19369887.
• Compare the electrical connector count and blade layout because catalogs list different sensor-equipped and non-sensor configurations.
• Verify the pressure-sensor arrangement, fuel ports, flange, reservoir, module height, and float-arm direction.

Module Functions and Service Components

• Electric in-tank pump supplies fuel to the engine-side delivery system.
• Fuel-level sending unit and float arm report tank level to the instrument cluster.
• Catalog data lists approximately 40 ohms at empty and 250 ohms at full for the matching sender.
• Common configurations include the module, strainer, tank seal, sending unit, float, and service harness; pressure-sensor and connector listings conflict and must be matched to the original assembly.

Symptoms and Diagnostic Checks

Measure running and residual fuel pressure before replacement. Test voltage and ground under load, inspect the fuse and relay, and check the wiring harness, fuel lines, sender circuit, regulator/check-valve behavior, and tank-pressure sensor when equipped. Incorrect GFN identification, an emissions or connector mismatch, a restricted filter or line, injector leak, tank contamination, or engine-management problem can create similar symptoms.

Installation Notes

Relieve fuel-system pressure, disconnect the battery, and support the tank safely. Clean the tank and sealing surface, install the correct new seal, complete any approved harness service, and keep the float arm clear. Prime the system, inspect the flange and lines for leaks, measure running and residual pressure, verify the sensor circuit when present, and confirm normal gauge operation.