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

Below RH Rear of Vehicle


Object Number: 228017  Size: LF
(1)RH Rear Rail
(2)Automatic Level Control Sensor
(3)Automatic Level Control Compressor
Figure 2:

RH Side of Rear Compartment (Pontiac)


Object Number: 228018  Size: LF
(1)Inflator Timer Relay
(2)Inflator Solenoid
(3)P403