ARLE IDENTIFICATION CODES 1984 3 07 RATIO HE3 OPT 3 31 RATIO GW4 OPT 4CC 4CF 4CH 4CJ 4CB 4CK 4CH 4CN 4CS 4YJ 1985 2 73 RATIO GU2 OPT 2 87 RATIO HK1 OPT 3 07 RATIO G44 OPT 5YN 5YY 5YB 5YX 4YJ 1986 2 59 RATIO GMI OPT 2 73 RATIO GUR OPT 3 07 RATIO GUU OPT 6YB 5VN 5YX 4YT 4YL 1987 2 59 RATIO GMI OPT 2 73 RATIO OUR OPT 3 07 RATIO GUU OPT 6YB 5YN 5YX 4YL 1988 2 59 RATIO GMI OPT 2 73 RATIO GU2 OPT 3 07 RATIO G44 OPT 8YA 8YB BYC BYH 1989 2 59 RATIO GM1 OPTION 2 73 RATIO CH3 OPTION 3 07 RATIO G44 OPTION CODE CODE CODE BYA 8YB 8YC 3 33 RATIO GT7 OPTION 3 54 RATIO CHO OPTION CODE CODE 8YW 8YJ 1990 2 59 RATIO GM1 OPT 2 73 RATIO GU2 OPT 3 07 RATIO G44 OPT 8YA COT 8YB COU 8YC COW 3 33 RATIO GT7 OPT 3 45 RATIO GM8 OPT BYW COP 6YD COR n 1991 92 2 59 RATIO GMI OPT 2 73 RATIO GU2 OPT 3 07 RATIO G44 OPT COT COU COX COW 3 45 RATIO GM3 OPT 3 54 RATIO GHO OPT COR COX 1993 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 14Y 383 sa 5000