GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2008 🢒 LaCrosse 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Data Communication Schematics
Figure 1:

L26
Object Number: 1889373 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
LY7 or LS4
Figure 2:

LY7
Object Number: 1889376 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
Data Link Connector Schematics L26