TRUCK SERIAL NUMBER DESICHATIIJN Effective August 1972 with start of 1973 Production ALL VEHICLES HAVE 13 CHARACTER SERIAL NUMBERS ANU WILL BE CUNSISTENT IN CHARACTER PLACEMENT ANU MEANINC A TYPICAL NEW VEHICLE IIIENTIFICATIUN NUMBER V I N EDR MDDEL CE617l1 IS C orT CEE3 5 V 555 354 MEANINC OF CHARACTERS IS AS FIILLUWS Model Number C IE 6 1 7 U 3 Cab Chassis Type 1 Engine Series 5 thru 6 Body Brake Type PUSITIUN NUMBER 12345Ii7B9IU111Z13 i IIIIIIIIIIIIEEIIIEII Sequence Number Plant Code Pontiac Model Year Code Model Code Make C Chev T GMC 2 CAB CHASSIS TYPES 5 BIJDY BRAKE TYPE C ConventionaI Cab It is important to note that the body brake description M Conventional Cab Tandem in this position of the V N may not necessarily signify S School Bus Cowl the exact body used on a specific vehicle In order to T Steel Tilt Cab determine the exact body refer to the full model description Effective w 1978 Models this position is now a constant zero 3 ENCINES 6 YEAR DESICNATIDN D In Line 4 53 Detroit Diesel T 1973 GMC E V8 Gas 3i 1973 CHEV l G GMC V6 Diesel 4 1974 M CMC V6 Cas 5 1975 S In Line 6 Cas 6 1976 Y CaterpiIIar DieseI V8 3208 7 1977 8 1978