ENGINE SERIAL NUMBER AND SUFFIX CHART 19 5 6 TYPE MODEL DESLRIPTION DESIGNATION 15 21 2400 V Regular 235 6 Cylinder 4 4 Z 15 21 2400 4 4 Regular 235 6 Cylinder with H D Clutch 4 ZC 15 21 2400 4 2l35 6 Cylinder Powerglide 4 4 4 Y 15 21 2400 V 4 8 Cylinder with 3 Speed Transmission 4 G 15 21 2400 t t 8 Cylinder with Overdrive 4 4 4 4 4 t 4 GC 15 21 2400 r 8 Cylinder with Air Conditioning and Overdrive r r r 4 GQ 15 21 2400 4 8 Cylinder with Power Pack and Overdrive 4 4 r GE 15 21 2400 8 Cylinder with 3 Speed and Air Conditioning r GF 15 21 2400 rr V 8 Cylinder with H D Clutch i r G 15 21 2400 i 8 Cylinder with H D Clutch and Air Conditioning 4 4 4 i GK 15 21 2400 4 4 4 8 Cylinder with Power Pack 4 4 4 4 4 4 4 4 GL 15 21 2400 44 4 4 8 Cylinder with Power Pack and Air Conditioning 4 i4 4 GM 15 21 2400 4 4 8 Cylinder with Power Pack Overdrive and Air Conditioning 4 4 4 4 4 4 GN CORVETTE 4 4 4 8 Cylinder with 3 Speed Transmission 4 4 4 4 4 GR 15 21 2400 4 8 Cylinder with Powerglide 4 4 4 4 4 4 4 4 4 4 F 15 21 2400 4 8 Cylinder with Powerglide and Power Pack 4 4 4 4 4 4 4 4 4 FB 15 21 2400 8 Cylinder with Powerglide and Air Conditioning 44 4 44 4 4 FC 15 21 2400 4 4 4 8 Cylinder with Powerglide Air Conditioning and Power Pack 4 i FD CORVETTE 44 r 8 Cylinder with Powerglide 4 4 4 4 4 4 4 4 4 4 4 4 FG 31 32 36 3800 Thriftmaster 235 4 4 4 4 4 4 4 X 31 32 36 3800 4000 4 Thriftmaster 235 with Hydramatic Transmission 4 4 4 4 4 4 44 XG 34 35 3700 4 Thiftmaster 235 Updraft Carburet0r Forward Control 4 4 4 W 34 35 3700 4 Thiftmaster 235 Updraft Carburetor with Hydramatic Transmis sion Forward Control WA 31 32 36 3800 4000 44 Thiftmaster 235 H D Clutch 4444 4 4 r 4 4 r 44 44 V 4000 6000 4 4 Loadmaster 235 4 4 4 4 4 4 4 r 4 4 4 1 1 4000 44 4 4 Loadmaster 235 with Hydramatic Transmission 4 4 4 4 4 4 UD 6000 4 4 lobmaster Z2l61 6 Cylinder 4 i 4 4 44 4 4 TA 31 32 36 3800 4000 8 Cylinder Regular 4 4 4 r 4 4 A 31 32 36 3800 4000 8 Cylinder Hydramatic Transmission 4 4 4 4 4 4 4 4 B 31 32 36 3800 4000 8 Cylinder 1 1 D Clutch 4 4 4 4 4 4 4 4 4 4 M 34 35 3700 4 4 4 8 Cylinder Forward Control4 r 4 4 4 4 4 D 34 35 3700 4 8 Cylinder Forward Control Hydrarnatic 4 r 4 4 4 DA 34 35 3700 4 4 8 Cylinder Forward Control H D Clutch 4 4 4 4 4 4 4 4 4 4 4 DB A stamped following suffix when this engine is used in 3600 Series and B when used in 3800 Series and C if used in 4000 Series A stamped following suffix when this engine is used in 3600 Series and B if used in 3800 Series and C if used in 3100 and 3200 Series A stamped following suffix when this engine is used in 4000 Series Six cylinder and 8 cylinder are numbered separately with each type engine numbered in sequence starting with 0001001 F will designate Flint engine T will designate Tonawanda engine EXAMPLE I The 50th 2100 Series regular production 235 6 cylinder engine built at Flint carries Serial No 0001050 FSGZ if built at Tonawanda 0001050 T56Z EXAMPLE II 0001025 F56UT 0001025 F 56 U Serial Number Flint Plant 1956 Loadmaster 2335 6000 Series 1 9 5 7 TYPE MODEL DESCRIPTION DESIGNATION 15 21 2400 Regular 235 6 cylinder 4 4 4 A 15 21 2400 4 Regular 235 6 cylinder with H D Clutch 44 4 4 4 4 4 AD 15 21 2400 4 235 6 cylinder Powerglide 4 44 4 4 4 4 4 4 4 4 4 B 15 21 2400 4 265 8 cylinder with 3 Speed Transmission 4 4 44 4 C 15 21 2400 4 4 265 8 cylinder with Overdrive 4 4 44 4 i 4 4 CD 15 21 2400 4 265 8 cylinder with H D Clutch 4 4 4 44 4 4 4 44 4 CE ll