GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 DeVille 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Data Link Connector Schematics
Figure 1:

Power and Ground
Object Number: 808892 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Class 2 Serial Data (1 of 3)
Class 2 Serial Data (1 of 3)
G200
G201 (2 of 3)
G200
G201 (2 of 3)
Underhood Fuse Block- ALDL, PCM BATT, and I/P Fuse
Underhood Fuse Block Battery Voltage
Figure 2:

Class 2 Serial Data (1 of 3)
Object Number: 808893 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Class 2 Serial Data (2 of 3)
Power and Ground
Class 2 Serial Data (2 of 3)
Class 2 Serial Data (3 of 3)
Power and Ground
Figure 3:

Class 2 Serial Data (2 of 3)
Object Number: 808898 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Class 2 Serial Data (3 of 3)
Class 2 Serial Data (1 of 3)
Class 2 Serial Data (3 of 3)
Class 2 Serial Data (1 of 3)
Class 2 Serial Data (3 of 3)
OBD II Symbol Description Notice
Figure 4:

Class 2 Serial Data (3 of 3)
Object Number: 808900 Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Class 2 Serial Data (2 of 3)
Class 2 Serial Data (2 of 3)
Class 2 Serial Data (1 of 3)
Class 2 Serial Data (2 of 3)