GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2004 🢒 Park Avenue 🢒 Transmission/Transaxle 🢒 Shift Lock Control 🢒 Automatic Level Control Component Views
Figure 1:

Below RH Rear of Vehicle
Object Number: 595799 Size: MF
(1)Automatic Level Control (ALC) Compressor
Figure 2:

Under the Rear of the Vehicle
Object Number: 594374 Size: SF
(1)Automatic Level Control (ALC) Sensor Link
(2)Automatic Level Control (ALC) Sensor