Generator (Alternator)

The date code on a generator is simple to decode. It includes the year, month and day such as 7K25. This decodes to 1967, October, 25th. Month codes are A through M for January through December (omitting the letter 'I').

A - JanuaryD - AprilG - JulyK - October
B - FebruaryE - MayH - AugustL - November
C - MarchF - JuneJ - SeptemberM - December

1964 - 283/327  
ACCESSORIESNUMBERAMPS
A/C only110066555
standard110066837
optional 42 amp110066942
optional 62 amp111776562
1965 - 283/327/396  
ACCESSORIESNUMBERAMPS
standard110069337
A/C and optional 55 amp (RPO K77)110069455
optional 42 amp (RPO K79)110069642
optional 60 amp110069760
optional 62 amp (RPO K81)111776562
1966 - 283/327/396  
ACCESSORIESNUMBERAMPS
standard (stamped "CB")110069337
optional 42 amp (Std w/396/375 and transistor ign - RPO K79)110069642
A/C and optional 61 amp (RPO K76)110075061
optional 62 amp (RPO K81)111776562
1967 - 283/327/396  
ACCESSORIESNUMBERAMPS
standard (stamped "CB")111069337
optional 42 amp (Std w/TH400 (stamped "CS") (RPO K79)110069642
A/C only (RPO K76)110075061
optional 62 amp (RPO K81)111777762
1968 - All  
ACCESSORIESNUMBERAMPS
No pulley110069642
6-cyl w/o smog control or P.S.; 8-cyl exc. Turbo-Hydramatic110079437
V-8 w/Turbo-Hydramatic A/C110079561
6-cyl w/o smog control or P.S.; 8-cyl A/C110079661
6-cyl smog control or P.S.110081367
6-cyl P.S.110081542
6-cyl smog control or P.S. A/C110081761
Optional111777762
1969 - All  
ACCESSORIESNUMBERAMPS
standard110083437
6-cyl smog control or P.S.110083637
optional 396-375110083737
extra output RPO (K79)110084242
V-8 A/C110084361
6-cyl A/C110084561
extra output (RPO K85)110084963
1970 - 307/350/402/454
ACCESSORIESNUMBERAMPS
standard with 307/350/402 (L34)/454 (LS3/LS5)110083437
standard with 402/454 L78/LS6 (deep pulley)110083737
A/C only110084361
optional 63 amp (RPO K85)110084763
1971 - 307/350/402/454
ACCESSORIESNUMBERAMPS
standard110056637
LS6 454-425 (engine n/a in the Chevelle)110083737
A/C only110084361
optional 63 amp110091763
1972 - 307/350/402/454
ACCESSORIESNUMBERAMPS
standard except 402/454110244037
standard with 402/454110245437
A/C only110246361
optional 63 amp110246463

CHEVELLESTUFF  All Rights Reserved
1967 42A generator
Date code "7B6," or 1967, February 6

CHEVELLESTUFF  All Rights Reserved
1970 37A generator
Date code "9H21" or 1969, August 21

CHEVELLESTUFF  All Rights Reserved
1100837 generator with deep pulley.

Courtesy Bill Hall
1972 61A generator
Date code "1J22," or 1971, September 22