GM RPO Axle Codes
#1
08-21-2010, 03:38 PM
GM RPO Axle Codes
Assuming no changes were made, the easiest method of determining a rear axle gear ratio is to look in the vehicle manufacturer's service manual. The following Regular Production Option (RPO) codes identify the rear axle and trans axle overall final drive gear ratio's. These codes can be located on the RPO sticker in the glove box or in the trunk on most GM vehicles
General Motors Corporation Drive Axle Gear Ratios
Official GM Web Site http://www.gm.comGeneral Motors Production Options.
The following Regular Production Option (RPO) codes identify the rear axle and transaxle overall final drive gear Ratios. These codes can be located on the RPO sticker in the glove box or in the trunk on most GM vehicles. Axle codes typically begin with the letter D, F, G, H, or Numerical.
These codes are arranged in alphanumeric order.
- D-codes are typically front-wheel drive vehicles.
- F-codes are typically front-wheel drive vehicles.
- G-codes are typically rear-wheel drive vehicles.
- H-codes are typically medium-duty trucks.
- Numerical codes are typically medium-duty trucks.
F-codes -
G-codes -
H-codes -
Numerical Codes (MD Trucks) -
Imported GM Vehicles
Last edited by z28pete; 10-06-2010 at 03:15 PM.
#8
04-08-2012, 08:41 AM
Join Date: Mar 2009
Location: Tokeland, Washington
Posts: 21,672
G Codes
RPO Ratio Axle Type
G44 3.07 Rear
G72 2.14 Rear
G75 3.62 Rear
G82 4.33 Transaxle
G83 4.47 Transaxle
G84 3.70 Rear
G89 4.13 Transaxle
G90 3.15 Rear
G91 6.83 Rear
GH0 3.54 Rear
GH1 3.55 Rear
GH2 2.29 Rear
GH3 2.77 Rear
GH4 2.28 Rear
GH7 2.73 Rear
GJ1 5.38 Rear
GJ2 5.13 Rear
GK7 4.78 Rear
GK8 4.33 Rear
GK9 4.63 Rear
GL0 5.13 Rear
GL3 6.17 Rear
GM0 3.58 Rear
GM1 2.59 Rear
GM2 3.44 Rear
GM3 3.45 Rear
GM4 3.67 Rear
GM5 3.89 Rear
GM6 4.22 Rear
GM7 2.39 Rear
GM8 2.56 Rear
GM9 3.63 Rear
GN9 4.11 Rear
GS0 6.43 Rear
GS4 2.70 Rear
GS8 3.94 Transaxle
GS9 3.46 Rear
GT1 5.63 Rear
GT2 4.77 Rear
GT3 4.55 Rear
GT4 3.73 Rear
GT5 4.10 Rear
GT6 4.19 Transaxle
GT7 3.33 Rear
GT8 4.10 Rear
GT9 2.87 Rear
GU1 2.41 Rear
GU2 2.73 Rear
GU3 2.93 Rear
GU4 3.08 Rear
GU5 3.23 Rear
GU6 3.42 Rear
GU7 3.73 Rear
GU8 3.90 Rear
GU9 3.91 Rear
GV0 3.55 Rear
GV1 3.85 Rear
GV2 5.83 Rear
GV3 3.57 Rear
GV4 3.36 Rear
GV5 3.82 Rear
GV7 4.05 Rear
GV8 2.72 Rear
GV9 4.25 Rear
GW1 3.91 Rear
GW4 3.31 Rear
GW5 3.16 Transaxle
GW6 3.27 Rear
GW8 2.92 Rear
GW9 2.93 Rear
GX1 5.43 Rear
GX3 3.33 Transaxle
GX4 3.75 Rear
GX5 4.09 Rear
GX6 3.53 Rear
GX8 3.74 Transaxle
GY1 3.85 Transaxle
GY2 4.30 Rear
GY3 4.29 Transaxle
GY4 4.53 Rear
GY5 3.75 Front
GY7 4.18 Transaxle
GY9 4.31 Rear
RPO Ratio Axle Type
G44 3.07 Rear
G72 2.14 Rear
G75 3.62 Rear
G82 4.33 Transaxle
G83 4.47 Transaxle
G84 3.70 Rear
G89 4.13 Transaxle
G90 3.15 Rear
G91 6.83 Rear
GH0 3.54 Rear
GH1 3.55 Rear
GH2 2.29 Rear
GH3 2.77 Rear
GH4 2.28 Rear
GH7 2.73 Rear
GJ1 5.38 Rear
GJ2 5.13 Rear
GK7 4.78 Rear
GK8 4.33 Rear
GK9 4.63 Rear
GL0 5.13 Rear
GL3 6.17 Rear
GM0 3.58 Rear
GM1 2.59 Rear
GM2 3.44 Rear
GM3 3.45 Rear
GM4 3.67 Rear
GM5 3.89 Rear
GM6 4.22 Rear
GM7 2.39 Rear
GM8 2.56 Rear
GM9 3.63 Rear
GN9 4.11 Rear
GS0 6.43 Rear
GS4 2.70 Rear
GS8 3.94 Transaxle
GS9 3.46 Rear
GT1 5.63 Rear
GT2 4.77 Rear
GT3 4.55 Rear
GT4 3.73 Rear
GT5 4.10 Rear
GT6 4.19 Transaxle
GT7 3.33 Rear
GT8 4.10 Rear
GT9 2.87 Rear
GU1 2.41 Rear
GU2 2.73 Rear
GU3 2.93 Rear
GU4 3.08 Rear
GU5 3.23 Rear
GU6 3.42 Rear
GU7 3.73 Rear
GU8 3.90 Rear
GU9 3.91 Rear
GV0 3.55 Rear
GV1 3.85 Rear
GV2 5.83 Rear
GV3 3.57 Rear
GV4 3.36 Rear
GV5 3.82 Rear
GV7 4.05 Rear
GV8 2.72 Rear
GV9 4.25 Rear
GW1 3.91 Rear
GW4 3.31 Rear
GW5 3.16 Transaxle
GW6 3.27 Rear
GW8 2.92 Rear
GW9 2.93 Rear
GX1 5.43 Rear
GX3 3.33 Transaxle
GX4 3.75 Rear
GX5 4.09 Rear
GX6 3.53 Rear
GX8 3.74 Transaxle
GY1 3.85 Transaxle
GY2 4.30 Rear
GY3 4.29 Transaxle
GY4 4.53 Rear
GY5 3.75 Front
GY7 4.18 Transaxle
GY9 4.31 Rear
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