1985 REAR AXLE IDENTIFICATION MODEL CODE RATIO SIZE BRAKE MODEL CODE RATIO SIZE BRAKE S1 GAC 3 08 7 50 9 5 X 2 EXC G80 S1 GAM 3 08 7 50 9 5 X 2 W G80 S1 GAD 3 42 7 50 9 5 X 2 EXC G80 S1 GAN 3 42 7 50 9 5 X 2 W GB0 S1 GAF 3 73 7 50 9 5 X 2 EXC G80 S1 GAP 3 73 7 50 9 5 X 2 W G80 S1 GAH 3 08 7 50 9 5 X 2 EXC G80 S1 GAR 4 11 7 50 9 5 X 2 W G80 S1 GAJ 3 42 7 50 9 5 X 2 EXC G80 S1 GAS 3 08 7 50 9 5 X 2 W G80 S1 GAK 3 73 7 50 9 5 X 2 EXC G80 S1 GAT 3 42 7 50 9 5 X 2 W G80 S1 GAL 4 11 7 50 9 5 X 2 EXC G80 S1 GAU 3 73 7 50 9 5 X 2 W G80 S1 GYA 3 08 7 50 9 5 X 2 EXC G80 S1 GAW 4 11 7 50 9 5 X 2 W G80 S1 GYB 3 42 7 50 9 5 X 2 EXC G80 S1 GYK 3 08 7 50 9 5 X 2 W G80 S1 V GYC 3 73 7 50 9 5 X 2 I EXC G80 S1 GYL 3 42 7 50 9 5 X 2 W G80 S1 GYD 4 11 7 50 9 5 X 2 EXC G80 S1 GYN 3 73 7 50 9 5 X 2 W G80 S1 GYF 3 08 7 50 9 5 X 2 EXC G80 S1 GYP 4 11 7 50 9 5 x 2 W G80 S1 GYG 3 42 7 50 9 5 X 2 EXC G80 S1 GYR 3 08 7 50 9 5 X 2 W G80 S1 GYH 3 73 7 50 9 5 X 2 EXC G80 S1 GYS 3 42 7 50 9 5 X 2 W G80 S1 GYJ 4 11 7 50 9 5 X 2 EXC G80 S1 GYT 3 73 7 50 9 5 X 2 W G80 S1 GNH 3 08 7 50 9 5 X 2 EXC G80 S1 GYU 4 11 7 50 9 5 X 2 W G80 A S1 GNJ 3 42 7 50 9 5 X 2 EXC G80 S1 GNS 3 08 7 50 9 5 X 2 W G80 S1 GNK 3 73 7 50 9 5 X 2 EXC G80 S1 GNT 3 42 7 50 9 5 X 2 W G80 S1 GNL 4 11 7 50 9 5 X 2 EXC G80 S1 GNU 3 73 7 50 9 5 X 2 W G80 S1 GNM 3 08 7 50 9 5 X 2 EXC G80 S1 GNW 4 11 7 50 9 5 X 2 W G80 S1 GNN 3 42 7 50 9 5 X 2 EXC G80 S1 GNX 3 08 7 50 9 5 X 2 W G80 A S1 GNP 3 73 7 50 9 5 X 2 EXC G80 S1 GNY 3 42 7 50 9 5 X 2 W G80 S1 GNR 4 11 7 50 9 5 X 2 EXC G80 S1 GNZ 4 11 7 50 9 5 X 2 W G80 T1 HCC 3 42 7 50 9 5 X 2 EXC G80 T1 HCG 3 42 7 50 9 5 X 2 W G80 A T1 HCB 3 73 7 50 9 5 X 2 EXC G80 T1 HCF 3 73 7 507 9 5 X 2 W G80 T1 HCA 4 11 7 50 9 5 X 2 EXC G80 T1 HCD 4 11 7 50 9 5 X 2 W G80 T1 HJA 3 42 7 50 9 5 X 2 EXC G80 T1 HJD 3 42 7 50 9 5 X 2 W G80 T1 HJB 3 73 7 50 9 5 X 2 EXC G80 T1 HJF 3 73 7 50 9 5 X 2 W G80 T1 HJC 4 11 7 50 9 5 X 2 EXC G80 T1 HJG 4 11 7 50 9 5 X 2 W G80 T1 HKA 3 42 A 7 50 9 5 X 2 EXC G80 T1 HKD 3 42 7 50 9 5 X 2 W G80 T1 HKB 3 73 7 50 9 5 X 2 EXC G80 T1 HKF 3 73 7 50 9 5 X 2 W G80 T1 HKC 4 11 7 50 9 5 X 2 EXC G80 T1 HKG 4 11 r7 50 9 5 X 2 W G80 1986 REAR AXLE IDENTIFICATION MODEL CODE RATIO SIZE BRAKE MODEL CODE RATIO SIZE BRAKE S1 GAC 3 08 7 50 9 5 X 2 EXC G80 S1 GAR 4 11 7 50 9 5 X 2 W G80 S1 GAD 3 42 7 50 9 5 X 2 EXC G80 S1 GAS 3 08 7 50 9 5 X 2 W G80 S1 GAF 3 73 7 50 9 5 X 2 EXC G80 S1 GAT 3 42 7 50 9 5 X 2 W GSO S1 GAG 4 11 7 50 9 5 X 2 EXC G80 S1 GAU 3 73 7 50 9 5 X 2 W G80 S1 GAH 3 08 7 50 9 5 X 2 EXC G80 S1 GAW 4 11 7 50 9 5 X 2 W G80 S1 GAJ 3 42 7 50 9 5 X 2 EXC G80 S1 GAM 3 08 7 50 9 5 X 2 W G80 S1 GAK 3 73 7 50 9 5 X 2 EXC G80 S1 GAN 3 42 7 50 9 5 X 2 W GB0 S1 GAL 4 11 7 50 9 5 X 2 EXC G80 S1 GAP 3 73 7 50 9 5 X 2 W G80 S1 HZH 3 08 7 50 9 5 X 2 W GB0 S1 HZJ 3 42 7 50 9 5 X 2 W G80 S1 HZK 3 73 7 50 9 5 X 2 W G80 S1 HZL 4 11 7 50 9 5 X 2 W G80 S1 HZM 3 08 7 50 9 5 X 2 W G80 S1 HZN 3 42 7 50 9 5 X 2 W G80 S1 HZP 3 73 7 50 9 5 X 2 W G80 S1 HZR 4 11 7 50 9 5 X 2 W G80 T1 HKA 3 42 7 50 9 5 X 2 EXC G80 T1 HKG 4 11 7 50 9 5 X 2 W G80 T1 HKB 3 73 7 50 9 5 X 2 EXC G80 T1 HKD 3 42 7 50 9 5 X 2 W G80 T1 HKC 4 11 7 50 9 5 X 2 EXC G80 T1 HKF 3 73 7 50 9 5 X 2 W G80 I T1 HZS 3 42 7 50 9 5 X 2 W G80 T1 HZT 3 73 7 50 9 5 X 2 W G80 T1 HZU 4 11 7 50 9 5 X 2 W GB0 1990 GENERAL MOTORS SERVICE PARTS 0PERAT ONS LT TRUCK 52S Lii REV 10 90 5 7 5 386