GM Service Manual Online
For 1990-2009 cars only

Application

GM SPO Group Number

Differential Lock

4.644

Differential Lock-Bendix

5.511

Differential Lock Switch

2.447

Differential Lock Valve

5.386

Inter-axle Differential Lock Indicator Switch

5.511

Inter-axle Differential Lock Switch

2.447

Pressure Protection Valve

4.644

Rear Axle

4.644

Rear Axle Shift

5.660

Rear Axle Switch

5.660

Two-Speed Rear Axle Shift Pressure Switch (Air-Operated)

5.660

Two-Speed Rear Axle Shift Switch Relay

4.720