T20 400 475 Model Turbo Hydra Matic Transmission The production ccde number contains the model year vehicle application build date and transmission model The transmission model number and sequence number is stamped below the build date code on the identification plate EXAMPLE 79 M 368 MODEL YEAR VEHICLE APPLICATION CODE BUILD DATE 1979 See chart below The build date starts with the date on which production started July 24 V 206th calendar dav and continues with the Julian date until I the end of production Model and sequence number example I 2 MODEL YEAR SEQUENCE NUMBER Q 1979 VEHICLE APPLICATION TRANS CODE VEHICLE CODE ENGINE SERIES CF K30 292 L 6 400 CG K20 30 400 4 BBL 400 CH K20 30 350 4 BBL 4lI 4 CM GGP30 292 305 350 400 CJ O P30 454 4 BBL 400 CP ul C10 20 454 4 BBL 400 CL P 30 350 4 BBL 475 CL P 30 M Home 454 4 BBL 475 CT O 30 Rent Unit 350 4 BBL 400 CZ O 10 250 L 6 400 I CK C I0 350 V 8 Diesel 400 CD O 30 454 V 8 S G 400 CW O 10 305 350 V B 400 EXAMPLE The transmission installed in the 25th 1979 truck produced at Flint will be stamped C9F 100025 WAREHOU ING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION LT TRUCK SIA REV 1 84 V 41