GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Automatic Level Control Compressor


Object Number: 516694  Size: MF
(1)Auto Level Control Compressor Assembly
Figure 2:

Under Left Rear of Vehicle


Object Number: 593173  Size: SF
(1)Suspension Position Sensor
(2)Suspension Position Sensor Link
Figure 3:

Rear Integration Module (RIM)


Object Number: 492170  Size: MF
(1)Rear Integration Module (RIM) C1
(2)Rear Integration Module (RIM) C2