GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2009 🢒 I-370 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Data Communication Schematics
Figure 1:

Class 2 Serial Data
Object Number: 2082785 Size: FS
Figure 2:

High Speed GMLAN Serial Data
Object Number: 2082788 Size: FS