GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Ground, Power, Signals, and References to Cellular Communications and Lighting


Object Number: 1430748  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Radio to Speakers - U79 or UX7
BCM (PWR), DASH, IP BATT 1, IP BATT 1A, LIGHTER, ONSTAR, PARK, PWR OUTLET, PWR WINDOWS, RADIO (ACC.), RADIO (BATT), SUN ROOF, and WIPER SW Fuses
Controls and Lamps (1 of 2)
OnStar
Radio to Amplifier to Speakers - UZ6
G201
Figure 2:

Radio to Speakers - U79 or UX7


Object Number: 1470981  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Radio to Amplifier to Speakers - UZ6
Ground, Power, Signals, and References to Cellular Communications and Lighting
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Figure 3:

Radio to Amplifier to Speakers - UZ6


Object Number: 1455369  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Digital Radio Receiver
Radio to Speakers - U79 or UX7
Fuseblock - Underhood Bus
Ground, Power, Signals, and References to Cellular Communications and Lighting
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
G401
Figure 4:

Digital Radio Receiver


Object Number: 1470985  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Radio to Amplifier to Speakers - UZ6
Fuseblock - Underhood Bus
BCM (PWR), DASH, IP BATT 1, IP BATT 1A, LIGHTER, ONSTAR, PARK, PWR OUTLET, PWR WINDOWS, RADIO (ACC.), RADIO (BATT), SUN ROOF, and WIPER SW Fuses
Entertainment Schematic Icons
G401
G401