GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 TrailBlazer - 4WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Data Communication Schematics
Figure 1:

Power, Ground, and Data Link Connector
Object Number: 1923911 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
SP205
Figure 2:

SP205
Object Number: 1923912 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
SP306
Power, Ground, and Data Link Connector
Figure 3:

SP306
Object Number: 1923913 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Control Module References
SP205