GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Park Avenue 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Automatic Level Control Component Views
Figure 1:

Below RH Rear of Vehicle
Object Number: 219822 Size: LF
(1)Automatic Level Control Compressor
Figure 2:

Under the Rear of the Vehicle
Object Number: 317706 Size: LF
(1)RH Rear Wheel Speed Sensor (LH Similar)
(2)C415
(3)Automatic Level Control Sensor