GM Service Manual Online
For 1990-2009 cars only

Electric

The two speed rear axle electric shift system includes the following parts:

    • A two speed rear axle shift switch
    • A two speed rear axle shift switch relay
    • A two speed rear axle shift motor
    • A speedometer adapter
    • A two speed rear axle wiring harness

Air

The two speed rear axle air shift system includes the following parts:

    • A two speed rear axle shift control valve
    • A two speed rear axle shift dash panel switch
    • A two speed rear axle shift quick release valve
    • A two speed rear axle pressure protection valve
    • A two speed rear axle shift motor
    • A speedometer adapter