Gear Ratio Identification by RPO Codes
1985 Chevrolet S10 Rear Axle ID Codes
All T1 (4x4) Models (except G80)
All T1 (4x4) Models (with G80)
All S1 (2wd) Models (except G80)
All S1 (2wd) Models (with G80)
Code
Ratio
HCC
3.42
HCG
GAC
3.08
GAM
HCB
3.73
HCF
GAD
GAN
HCA
4.11
HCD
GAF
GAP
HJA
HJD
GAH
GAR
HJB
HJF
GAJ
GAS
HJC
HJG
GAK
GAT
HKA
HKD
GAL
GAU
HKB
HKF
GYA
GAW
HKC
HKG
GYB
GYK
GYC
GYL
GYD
GYN
GYF
GYP
GYG
GYR
GYH
GYS
GYJ
GYT
GNH
GYU
GNJ
GNS
GNK
GNT
GNL
GNU
GNM
GNW
GNN
GNX
GNP
GNY
GNR
GNZ