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

Power, Ground and High Speed Serial Data (w/o HP7)
Object Number: 1899529 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
Power, Ground and High Speed Serial Data with HP7
Figure 2:

Power, Ground and High Speed Serial Data (HP7)
Object Number: 1899606 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
Low Speed Serial Data
Power, Ground and High Speed Serial Data without HP7
Figure 3:

Low Speed Serial Data
Object Number: 1899533 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
Power, Ground and High Speed Serial Data - HP7