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

Compressor Motor Control


Object Number: 848742  Size: FS
Master Electrical Component List
Automatic Level Control Description and Operation
Suspension Level Control
IGN 3
ABS, VSES/ECAS, STUD #1, STUD #2, TBC BATT
ABS, VSES/ECAS, STUD #1, STUD #2, TBC BATT
IGN 3
G401, G402, G403
Figure 2:

Suspension Level Control


Object Number: 848743  Size: FS
Master Electrical Component List
Automatic Level Control Description and Operation
Conpressor Motor Control
RTD, RR WPR, EAP, SUNROOF, IPC/DIC, SEO B1
RTD, RR WPR, EAP, SUNROOF, IPC/DIC, SEO B1
Suspension Position Sensors