LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1981 >> Forward Control 7.4L Eng VIN W, Automatic Trans, Trans Mfr CD 400/M40 >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 7.4L V8 Engine >> Identification Coding >> Engine Identification
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Engine Identification

Engine code letter is suffix of Engine Identification Number. Number is stamped on pad at front top center of cylinder block, forward of intake manifold.

ENGINE IDENTIFICATION CODES

Application Code
7 4L (454") 4-Bbl TRL, TRK, TRM, UCA, UCB, UCD
scientia non olet · About LEMON Manuals