GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2007 🢒 DTS 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 OnStar Schematics
Figure 1:

OnStar - UE1
Object Number: 1759794 Size: FS
OnStar Description and Operation
Data Link Communications
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Rear Fuse Block B+
G402
Power, Ground and Low Speed GMLAN
G305
Figure 2:

Data Link Communication
Object Number: 1759795 Size: FS
OnStar Description and Operation
UE1
High Speed Serial Data