GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2004 🢒 Century 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Cellular Communication Component Views
Figure 1:

OnStar System
Object Number: 823641 Size: LF
(1)Headliner Wiring Harness
(2)Cellular Telephone Microphone
(3)OnStar Button Assembly
(4)Cellular Telephone Antenna
(5)Navigation Antenna
(6)Vehicle Communications Interface Module (VCIM)
(7)Body Wiring Harness
Figure 2:

Left Side of the Luggage Compartment Components
Object Number: 911116 Size: MF
(1)Body Wiring Harness
(2)Vehicle Communications Interface Module (VCIM)
(3)Cellular Telephone Antenna Connection
(4)Vehicle Communications Interface Module (VCIM) C1, C2
(5)Navigation Antenna Connection
Figure 3:

Left Side of Rear Window Shelf
Object Number: 885618 Size: MF
(1)Cellular Antenna Connector (UE1)
(2)C404 (UE1)
(3)Body Wiring Harness
(4)C403 (UE1)
(5)Navigation Antenna Connector (UE1)