GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 Catera 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Data Link Connector Schematics
Figure 1:

DLC Pins 4, 16, 5, and 2
Object Number: 603912 Size: FS
Figure 2:

DLC Pins 8 and 12
Object Number: 603953 Size: FS
Figure 3:

DLC Pins 3 and 7
Object Number: 603957 Size: FS
Figure 4:

Overview of All Modules
Object Number: 603959 Size: FS