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NHTSA Campaign 94V164000

FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

Issued by AM GENERAL CORPORATION · Reported Sep 1, 1994 · 2,300 vehicles affected

What's wrong

THE OIL PRESSURE SWITCH WHICH CONTROLS THE POWER TO THE ELECTRIC FUEL PUMP CAN FAIL. FAILURE IS DUE TO A MISSING RUBBER SEAL BETWEEN THE SWITCH AND THE WIRING HARNESS. THE MISSING SEAL ALLOWS CONTAMINANTS TO ENTER THE SWITCH CAUSING IT TO FAIL IN THE OPEN OR CLOSED POSITION.

Consequence

IF THE SWITCH FAILS IN THE CLOSED POSITION, THE PUMP WILL CONTINUE TO RUN WHEN THE ENGINE IS OFF, DRAINING THE BATTERY. IF THE SWITCH FAILS IN THE OPEN POSITION IT WILL CAUSE POOR PERFORMANCE AND POSSIBLY STALLING.

Remedy

DEALERS WILL INSPECT THE VEHICLES FOR THE PRESENCE OF THE SEAL. IF THE SEAL IS MISSING, THE SWITCH WILL BE REPLACED AND A NEW SEAL WILL BE INSTALLED.

Vehicles affected by this recall

Make Model Year Units
AM GENERAL HUMMER 1992 2,300
AM GENERAL HUMMER 1993 2,300
AM GENERAL HUMMER 1994 2,300

Source: NHTSA Campaign 94V164000 on nhtsa.gov. To check the current repair status for a specific vehicle, use our free VIN decoder.