1990 REAR AXLE IDENTIFICATION I MODEL CODE RATIO SIZE BRAKE MODEL CODE RATIO SIZE BRAKE S1 GAJ 3 42 7 50 9 5 X 2 EXC G80 S1 GAL 4 11 7 50 9 5 X 2 W G80 Sl GAK 3 73 7 50 9 5 X 2 EXC G80 S1 HZP 3 73 7 50 9 5 X 2 W G80 S1 KUK 3 08 7 625 9 5 X 2 EXC G80 S1 HZR 4 11 7 50 9 5 X 2 W G80 S1 PMM 3 42 7 625 9 5 X 2 EXC G80 S1 PML 3 42 7 625V 9 5 X 2 W GSO S1 RNB 2 73 7 625 9 5 X 2 EXC G80 S1 RND 3 08 7 625 9 5 X 2 W G80 S1 RNC 3 08 7 625 9 5 X 2 EXC G80 S1 RNG 3 42 7 625 9 5 X 2 W G80 51 RNF 3 42 7 625 9 5 X 2 EXC G80 T1 RNH 13 08 7 625 9 5 X 2 EXC G80 T1 KUS 3 42 7 625 9 5 x 2 W G80 T1 RNJ 3 42 7 625 9 5 X 2 EXC GSO T1 RNK 3 42 7 625 9 5 X 2 W GSO T1 KUN 3 08 7 625 9 5 X 2 EXC G80 T1 KUR 3 42 7 625 9 5 X 2 EXC G80 A j i 1990 GENERAL MOTORS SERVICE PARTS OPERAT ONS LT TRUCK 52S Y i REV 10 90 5 s 5 386