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Chevrolet V8 Engine ID Codes

1966

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Model Model No. CID H.P. (RPO Code) Trans/Options Suffix
Passenger 154/156/164/16600 283 195 Manual GA
        Manual, R.H.D. GB
        3-speed, police GC
        Manual, low compression GD
        Manual, low compression, RHD GE
        Powerglide GF
        Powerglide, low compression GG
        Powerglide, RHD GH
        Powerglide, low compression, RHD GI
        Manual, A.I.R. GK
      220 (RPO L77) Powerglide, 4-bbl GL
      195 4-speed, A.I.R. GS
        Powerglide, A.I.R. GT
        H.D. Clutch GU
      220 H.D. Clutch GV
        Manual, 4-bbl GW
        Manual, 4-bbl, A.I.R. GX
        Powerglide, 4-bbl, A.I.R. GZ
    327 275 (RPO L30) Manual, Holley 4-bbl HAH
        A.I.R. HB
        Powerglide, Holley 4-bbl HCH
        Powerglide, Rochester 4-bbl HCR
        Powerglide, A.I.R. HF
        H.D. Clutch KE
    396 325 (RPO L35) H.D. 3-speed or 4-speed, Holley 4-bbl IAH
        H.D. 3-speed or 4-speed, Rochester 4-bbl IAR
        H.D. 3-speed or 4-speed, A.I.R. IB
        Powerglide, A.I.R. IC
        Powerglide, Holley 4-bbl IGH
        Powerglide, Rochester 4-bbl IGR
        Turbo Hydra-Matic, A.I.R. IN
        Turbo Hydra-Matic, Holley 4-bbl IVH
        Turbo Hydra-Matic, Rochester 4-bbl IVR
    427 425 (RPO L72) Manual, S.H.P. ID
      390 (RPO L36) H.D. 3-speed or 4-speed IH
        H.D. 3-speed or 4-speed, A.I.R. II
        Turbo Hydra-Matic IJ
        Turbo Hydra-Matic, A.I.R. IO
           
Corvette 19437/19467 327 300 Manual HE
        Manual, A.I.R. HH
        Powerglide HO
        Powerglide, A.I.R. HR
      350 (RPO L79) 4-speed, H-lift camshaft, A.I.R. HD
        4-speed, H-lift camshaft, A.C., P.S. H.P.
        4-speed, H-lift camshaft HT
        4-speed, H-lift camshaft, A.I.R., A.C., P.S. KH
    427 390 (RPO L36) 4-speed, Hydraulic Lifters, Special Cam IL
        4-speed, Hydraulic Lifters, Special Cam, A.I.R. IM
        Powerglide, Hydraulic Lifters, Special Cam IQ
        Powerglide, Hydraulic Lifters, Special Cam, A.I.R. IR
      425 (RPO L72) M22 4-speed, Special Cam, Mechanical Lifters IK
        4-speed, Special Cam, Mechanical Lifters IP
        M22 4-speed, Special Cam, Mechanical Lifters - H.D. IT
        M22 4-speed, Special Cam, Mechanical Lifters - Aluminum Heads IU
           
Chevy II/Nova 114/116/11800 283 220 (RPO L77) Powerglide, A.C. PB
      195 3-speed PD
        3-speed, A.I.R. PE
        3-speed, A.C. PF
        3-speed, A.I.R., A.C. PG
      220 Powerglide, 4-bbl PK
      195 4-speed PL
        4-speed, A.C. PM
        Powerglide PN
        Powerglide, A.I.R., A.C. PO
        Powerglide, A.C. PP
        4-speed, A.I.R. PQ
        4-speed, A.I.R., A.C. PS
        Powerglide, A.I.R. PU
      220 Manual, 4-bbl QA
        Manual, 4-bbl, A.C. QB
        Manual, 4-bbl, A.I.R. QC
        Powerglide, 4-bbl, A.I.R. QD
        Powerglide, 4-bbl, A.I.R., A.C. QE
        Manual, 4-bbl, A.I.R., A.C. QF
    327 275 (RPO L30) Manual ZA
         A.I.R. ZB
         A.I.R., A.C. ZC
        Powerglide, A.I.R. ZD
        Manual, A.C. ZE
        Powerglide, A.I.R., A.C. ZF
      350 (RPO L79) A.I.R., S.H.P. ZG
        A.I.R., A.C., S.H.P. ZH
      350 Manual, S.H.P. ZI
        Manual, A.C., S.H.P. ZJ
      275 Powerglide ZK
      275 Powerglide, A.C. ZM
           
Chevelle 132/134/136/13800 283 195 3-speed or Overdrive DA
        4-speed DB
        Powerglide DE
      220 (RPO L77) 3- and 4-speed, 4-bbl DG
        Powerglide, 4-bbl DH
      195 3-speed or Overdrive, A.I.R. DI
        Powerglide, A.I.R. DJ
        4-speed, A.I.R. DK
      220 Manual, 4-bbl, A.I.R. DL
        Powerglide, 4-bbl, A.I.R. DM
      195 H.D. Clutch DN
      220 H.D. Clutch DO
    327 275 (RPO L30) Manual, Holley EAH
        Manual, A.I.R. EB
        Powerglide, A.I.R. EC
        Powerglide EE
        H.D. Clutch EO
      350 (RPO L79) H.D. 3-speed or 4-speed EP*
        H.D. 3-speed or 4-speed, A.I.R. ER*
        H.D. 3-speed or 4-speed ES*
    396 325 (RPO L35) H.D. 3-speed or 4-speed, Holley EDH
      360 (RPO L34) H.D. 3-speed or 4-speed, H.P. EF
      375 (RPO L78) H.D. 3-speed or 4-speed, S.H.P. EG
      325 H.D. 3-speed or 4-speed, A.I.R. EH
      360 H.D. 3-speed or 4-speed, A.I.R. EJ
      325 Powerglide, Holley EKH
      360 Powerglide, H.P. EL
      325 Powerglide, A.I.R. EM
      360 Powerglide, A.I.R., H.P. EN


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* Not available in 1966 Chevelle although engine codes were assigned
A.C. - Air Conditioning
A.I.R. - Air Injection Reactor
COPO - Central Office Production Order
F.I. - Fuel Injection
H.D. - H.D.
H.P. - High Performance
P.S. - Power Steering

R.H.D. - Right-Hand Drive
S.H.P. - Special High Performance

 

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1966 Chevelle 396/325 Horsepower RPO L35
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1966 Corvette 427/390 Horsepower RPO L36