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

L26
Object Number: 2081733 Size: FS
Figure 2:

LY7/LS4
Object Number: 2081736 Size: FS