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We'll begin this section with the numbers and codes followed by some facts and history. Here they are: On the Corvette, the vehicle serial number tag shows the manufacturers identity, vehicle type, year, engine, assembly plant and production unit. The Corvette engine identity tag is stamped at the base of the right hand cylinder head forward end. This pad extends out about 1/2 inch and is easily recognized because of its smooth flat surface. Sometimes it may be necessary to wire brush this pad to make the numbers more visible. The first number designates the assembly plant in which the engine was manufactured. The numbers that follow indicate the production date. The letters identify the engine type and related equipment. On 1972 and later models, if the engine in the vehicle is known to be original, the fifth digit (1972 - 80) and the eigth digit (1981 - 84) of the serial number may also identify the engine used in the vehicle.
VIN Numbers and their connection: Breaking things down...this is how a V.I.N. number is read: V.I.N. Chart 1963-71 (156458F100025 ) MFR I.D. Body style Model year Assy. Plant Unit Number 1 5645 8 F (Flint) 100025 The first "1" is the identity number assigned to all Chevrolet vehicles. The second group of numbers is the model identification. The number "8" represents the last digit of the model year. The letter "F" indicates that the vehicle was produced at the plant in Flint. Lastly, the unit number here shows that this was car number 25 off the assembly line. Unit numbering always starts at 100,001 at all plants. V.I.N. Chart for 1972 - 80 (1N47R4F100025) MFR I.D. Series code letter Body style Engine Model Model year Assy. Plant Unit Number 1 N 47 R 4 F 100025 The "1" is the manufacturers identity. Chevy. The "N" represents the model series. The 47 indicates that it was a Corvette. "R" is the engine code. The "4" is the last number of the model year. "F" represents the production plant - Flint, MI. The last section (100025) represents the unit number which will start at 000001 or 100,001 depending on the model. V.I.N. Chart for 1981 - 84 (1G1AY8769BS400.001) MFR I.D. Restraint System Type Basic Car Model Body Type Engine Model Check Digit Model year Assy. Plant Unit Number 1G1 A Y 87 6 9 B S 400.001 The number "1" represents the vehicle as a Chevrolet. The letter "A" indicates that the car had the "non-passive restraint system with manual seat belts. The letter "Y" identifies the car as a Corvette. "87" indicates that the car was a two door coupe. The number "6" IS THE ENGINE CODE. "6" INDICATES 1981 WHILE AN "8" SHOWS 1982-84 ENGINE BLOCK. The number "9" is a manufacturers code. The B represents the model year. B=1981, C=1982, E= 1984 etc. The "S" shows that the car was produced at the St. Louis plant. 5 would indicate Bowling Green, KY. The 400.001 represents the unit number which varies with the year. Letter codes and numbers obviously change to identify the differences. Individual codes not shown
ENGINE IDENTIFICATION 1963-64 327 CID Manual TRransmission RC Manual Transmission and High performance RD Special High Performance RE Manual Transmission/Fuel Injection RF Powerglide SC Powerglide and High Performance SD
1964 327 CID Manual Transmission and A/C RP Manual Transmission, Special High Performance A/C RQ Manual Transmission w/Transistor Ignition RT Fuel Injection and Transistor Ignition RX Fuel Injection, Transistor Ignition, A/C RU Powerglide and A/C SK Powerglide, High Performance, A/C SL
1965 327 CID Manual Transmission HE High Performance HF Fuel Injection HG Special High Perfomance HH A/C HI High Performance and A/C HJ Special High Performance and A/C HK Transistor Ignition HL Transistor Ignition and A/C HM Fuel Injection and Transistor Ignition HN Powerglide HO Powerglide and High Perfomance HP Powerglide with A/C HQ Powerglide, A/C and High Performance RH Special High Performance with Hydraulic Lifters HT Special High Performance, Hyd. Lifters, Transistor Ign. HV Special High Perf., A/C, Hyd. Lifters and Transistor Ign. HW 1965 396 CID Special High Performance IF
1966 327 CID Manual Transmission HE A.I.R. HH A.I.R. and Powerglide HR Special High Performance and A.I.R. HD Powerglide HO Special High Performance HT Power steering, Spcial High Performance, A.I.R. HP Special High Performance, A/C, A.I.R. KH 1966 427 CID Special High Performance and Hydraulic lifters. IK High Performance IL A.I.R. IM Special High Performance IP Powerglide IQ Powerglide and A.I.R. IR
1967 327 CID Manual Transmission HE A.I.R. HH A.I.R. and Powerglide HR Special High Performance and A.I.R. HD Powerglide HO Special High Performance HT Power Steering, Special High Performance, A/C HP Special High Performance, A/C, A.I.R. KH 1967 427 CID 4 Speed or Powerglide IL Tri Power Carb JC A.I.T., Special High Performance, Tri Power JE Heavy Duty IT Aluminum Heads IU A.I.R. IM A.I.R. and Tri Power JF A.I.R. and Aluminum Heads JH Powerglide IQ Powerglide and Tri Power carb JD A.I.R. and Powerglide IR A.I.R., Tri Power, Powerglide JG A.I.R., Tri Power, Special High Performance JA
1968 327 CID Manual Transmission HE Turbo Hydra-Matic HO Power Steering and A/C HP Special High Performance HT 1968 427 CID Special High Performance IL High Performance and Tri-Power Carb IM High Performance, Tri- Power, Turbo Hydra-Matic IO Turbo Hydra-Matic IQ Special High Performance, Tri-Power Carb IR High Performance IT Special High Performance, Aluminum Heads, Tri-Power Carbs IU * Note two "High performance" codes.
1969 350 CID High Performance HW High Performance and A/C HX Manual Transmission HY Turbo Hydra-Matic HZ 1969 427 CID High Performance, Turbo Hydra-Matic LL High Performance LM Tri-Power, High Performance, Turbo Hydra-Matic LN Heavy Duty (L88) LO Aluminum Heads LP Tri-Power and High Performance LQ Tri-Power and Special High Performance LR Tri-Power, Special Hig Performance, Heavy Duty Clutch LU Heavy Duty and Turbo Hydra-Matic LV Tri-Power Carbs, Special High Performance and Turbo Hydra-Matic LX
1970 350 CID Manual Transmission CTL Turbo Hydra-Matic CTM High Performance CTN High Performance and A/C CTO High Performance and Transistor Ignition CTP High Performance, Transistor Ignition, A/C CTQ Special High Performance CTR Special High Performance and Transistor Ignition CTU Special High Performance, Transistor Ignition, 4 speed CTV High Performance 4 bbl Carb, Turbo Hydra-Matic CZN High Performance, 4-bbl Carb, Transistor Ignition CRI 1970 454 CID High Performance 4-bbl carb, Turbo Hydra-Matic CGW High Performance and 4-bbl Carb CZU Heavy Duty with 4-bbl Carb CZL Heavy Duty with 4-bbl and Turbo Hydra-Matic CZN High Performance, 4-bbl, Transistor Ignition. CRI
1971 350 CID 270 HP 4 Speed CJL 270 HP Turbo Hydra-Matic CGT 330 hp 4 Speed CGZ 330 hp Turbo Hydra-Matic CJK 330 hp 4 Speed - Heavy Duty CGY 1971 454 CID 365 hp Turbo Hydra-Matic CPJ 365 hp 4 Speed CPH 425 hp 4 Speed CPW 425 hp Turbo Hydra-Matic CPX
1972 350 CID 200 hp With Four Speed CKW 200 hp with 4 Speed, NOX control (California) CDH 200 hp with Turbo Hydra-Matic CKX 200 hp with Turbo Hydra-Matic and NOX control (California) CDJ 255 hp with 4 Speed CKY 255 hp with Turbo Hydra-Matic CKZ 255 hp with 4 Speed and A.I.R. CRT 255 hp with Turbo Hydra-Matic and A.I.R. CRS 1972 454 CID 270 hp with 4 Speed CPH 270 hp with Turbo Hydra-Matic CPJ 270 hp CSR, C
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