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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



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