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HOMESERVICE MANUALSGMC1984VALUE VAN P3500, 5.7 M, AUTOMATIC, 400/M40REPAIR AND DIAGNOSISENGINE MECHANICALMECHANICAL6.2L V8 DIESEL - VINS [C,J]ENGINE IDENTIFICATION
1984 GMC Value Van P3500, 5.7 M, Automatic, 400/M40

Engine Identification

1984 GMC Value Van P3500, 5.7 M, Automatic, 400/M40SECTION Engine Identification
NOTE: For engine repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article in GENERAL INFORMATION.

Engine can be identified by the eighth digit of the 17-digit Vehicle Identification Number (VIN). Engine code letter is suffix of Engine Identification Number, located on a label on rear of left valve cover.

ENGINE IDENTIFICATION CODES

Application Engine Code
VIN Code C (1) LH6
VIN Code J (2) LL4
(1) Engine Identification No.: FHB, FHC, FHD, FHF, FHH, FHJ, FHK, FHM, FHN, FHR, FHW, FHX, FHY, FFZ
(2) Engine Identification No.: FJA, FJB, FJC, FJF, FJH, FJJ, FJK, FJM, FJN, FJR, FJS, FHS, FJT, FHT, FJU, FJW, FHZ, FZA, FJX, FJY, FJZ
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.