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

Rear Air Suspension Components


Object Number: 1718006  Size: LF
(1)Air Spring - Right Rear (F38)
(2)Suspension Position Sensor - Right Rear (F38)
(3)Air Spring - Left Rear (F38)
(4)Suspension Position Sensor - Left Rear (F38)
Figure 2:

Rear Axle Area


Object Number: 1656972  Size: LF
(1)Suspension Position Sensor - RR (F55)
(2)Wheel Speed Sensor - RR
(3)Body Harness
(4)Wheel Speed Sensor - LR
(5)Suspension Position Sensor - LR (F55), Automatic Level Control Module (FE1, FE3, F41)
(6)C308 Rear Wheel Speed Harness to Chassis Harness
(7)Rear Wheel Speed Harness