AXLE IDENTIFICATION CODES INDICATES POSITRACTION 1991 2 56 RATIO GM8 OPTION 3 08 RATIO GU4 OPTION 3 42 RATIO GU6 OPTION CODE RING GEAR CODE RING GEAR CODE RING GEAR 4GM 7 5 4NC 8 5 4ZK 8 5 4ZH 8 50 4LG 8 5 4ZJ 8 5 4ZL 8 50 4LK 8 5 4GA 7 5 4NP 8 5 2 73 RATIO GU2 OPTION 3 23 RATIO GU5 OPTION CODE RING GEAR CODE RING GEAR 4YL 8 5 4YM 8 5 4YE 8 5 4LN 8 50 1992 2 56 RATIO GM8 OPTION 3 08 RATIO GU4 OPTION 3 42 RATIO GU6 OPTION CODE RING GEAR CODE RING GEAR CODE RING GEAR 6ZA 8 50 6NC 8 50 6ZB 8 50 6ZC 8 50 6LA 8 50 6ZD 8 50 6GD 7 50 4NO 8 50 6GN 8 50 6GE 7 50 4LM 8 50 6GL 8 50 6GM 8 50 8NG 8 50 6GP 8 50 6GK 8 50 8LM 8 50 GGS 8 50 2 73 RATIO GU2 OPTION 3 23 RATIO GU5 OPTION CODE RING GEAR CODE RING GEAR 6YL 8 50 6YF 8 50 6YM 8 50 6LN 8 50 8GJ 8 50 6YE 8 50 6YK 8 50 1993 2 56 RATIO GM8 OPTION 3 08 RATIO GU4 OPTION 3 42 RATIO GU6 OPTION CODE RING GEAR CODE RING GEAR CODE RING GEAR 6GM 8 50 8LA 8 50 6GS 8 50 SGD 7 50 8NC 8 50 6GP 8 50 8GE 7 50 8NG 8 50 6GK 8 50 V 8LM 8 50 8LN 8 50 2 73 RATIO GU2 OPTION 3 23 RATIO GU5 OPTION CODE RING GEAR CODE RING GEAR 6YL 8 50 6YE 8 50 6YM 8 50 1992 GENERAL MOTORS SERVICE PARTS OPERAT 0NS CHEVROLET 17B 5 000 5 2 8 92 7