V 1980 84 TRUCK I MANUFACTURING SOURCE T2 TRANSMISSION STAMPING INFORMATION g Source stamping information for the 1980 81 Truok Transmission consists of five 5 characters two 2 alpha and three 3 numeric as shown below POSITION 1 MANUFACTURING SOURCE CODE The following alpha codes will be stamped in the Hrst ist position identifying the Manufacturing Source CODE MANUFACTURING SOURCE TYPE B Parma CBC J GM of Canada CBC K Muncie Four 4 Speed 70 mm Light Duty N Muncie Four 4 Speed 117 mm Truck R Muncie Four 4 Speed 76 mm Light Duty S Muncie Three 3 Speed 76 mm Light Duty Y Toledo CBC POSIIION Z MODE YEAR The number 0 zero will be stamped in the second 2nd position for model year 1980 POSITION a CALENDAR MONTH PRODUCED V The following alpha codes will be stamped in the third 3rd position identifying the calendar month pro duced Y 7 CODE MONTH A January B February C March D April E g May H June K July M August P September R October S November T December WAREHOUSING AND DISTRIBUTION DIVISION DF GENERAL MOTORS CORPORATION LT TRUCK SZA REV 1 84 as