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

Low Speed GMLAN
Object Number: 2077827 Size: FS
Figure 2:

High Speed GMLAN
Object Number: 2077830 Size: FS
Figure 3:

Communication Enable and Local Interconnect Network (LIN)
Object Number: 2077832 Size: FS