FUEL EXHAUST CARBURETION CHEVROLET MODEL REFERENCE 1983 ELECTRONIC FUEL INJECTION EFI THROTTLE BODY INJECTED FOLLOW PROCEDURE OUTLINED BELOW T0 DETERMINE CARBURETOR AND OR PART NUMBER 1 DETERMINE VEHICLE MODEL CHECK VIN DIVISIONAL CODE 2 DETERMINE ENGINE AND CARBURETOR TYPE 3 PART NUMBER CAN BE DETERMINED BY CROSS REFERENCING CORRESPONDING COLUMN NUMBER WITH SAME COLUMN NUMBER ON CHARTS VIN PRODUCTION DIV CODE USAGE COL NO 17082051 12 F 5 0S W FED FRONT INJECTOR UNIT SEE NOTE 1 17082050 12 F 5 OS W FED REAR INJECTOR UNIT SEE NOTE 2 17083054 12 F 5 0S W FED COMPLETE UNIT SEE NOTE 1 3 17083060 12 F 2 5 2 4 17082050 NOTE REAR MASTER UNIT FOR 2X1 PROD ASM 17083054 17082051 NOTE FRONT SLAVE UNIT FOR 2X1 PROD ASM 17083054 17083054 NOTE THROTTLE BODY INJ ASMS SERV SEP SEE 17082050 17082051 FOR DETAILS 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17F TREV 6 88 CAFIB EFI 5 3 25 GROUP