FUEL EXHAUST CARBURETIZON CHEVROLET MODEL REFERENCE 1986 ROCHESTER 4 BC 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 13 PART NUMBER CAN BE DETERMINED BY CROSS REFERENCING CORRESPONDING COLUMN NUMBER WITH SAME COLUMN NUMBER ON CHARTS VIN PRODUCTION DIV CODE USAGE COL N0 17086004 12 F 305H W A T FED CALIF 1 17086040 12 F 305G W M T M39 2 17086005 12 F 305H W M T MC4 M39 FED CALIF 3 i 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17F IREV 6 88 CARB 4BBL ROCH 19 3 725 GROUP