Axle Ratio & Identification
Service parts identification label contains Regular Production Options (RPO) codes that can help to properly service the vehicle. The service parts label can be found on the inside of the glove compartment door, on the passenger side of the instrument panel. See AXLE RATIO IDENTIFICATION .
AXLE RATIO IDENTIFICATION
| GM RPO Code | Axle Ratio |
| GU2 | 2.73 : 1 |
| GU6 | 3.42 : 1 |
| G90 | 3.15 : 1 |