FUEL EXHAUST CARBURETION CHEVROLET MODEL REFERENCE 1986 ELECTRONIC FUEL INJECTION EFI THROTTLE BODY INJECTED FOLLOW PROCEDURE OUTLINED BELOW TO 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 DETLERMINED BY CROSS REFERENCING CORRESPONDING COLUMN NUMBER WITH SAME COLUMN NUMBER ON CHARTS VIN PRODUCTION DIV CODE USAGE COL N0 17085062 12 F 2 5 2 W M T 1 17086109 1 2 F 2 5 2 W M T SEE NOTE 2 17086109 NOTE WHEN USED ON VEHS WHICH HAVE HEAT SHIELDS ON EGR VALVE REMOVE EGR VALVE HEAT 17086109 NOTE SHIELD AND USE HEAT SHIELD WHICH IS ATTCH TO TPS SCREWS AS SUPPLIED WITH PART 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17F REV 6 88 CARB EFI 17 3 725 GROUP