GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Yukon XL - 2WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Automatic Level Control Schematics
Figure 1:

Compressor Controls
Object Number: 1907187 Size: FS
Master Electrical Component List
Automatic Level Control Description and Operation
Control Module References
Pressure Controls
RUN/CRANK Bus - AIRBAG IGN, MISC IGN and SEO/ALC Fuses
ALC/COMP, EAP, and LGM Fuses
G400
Figure 2:

Pressure Controls
Object Number: 1907190 Size: FS
Master Electrical Component List
Automatic Level Control Description and Operation
Control Module References
Compressor Controls
AMP, ELEC RUN BOARD, ESC/ALC EXH, EXP/BRK MDL, and TREC Fuses