GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Cadillac
🢒
2001
🢒
Seville
🢒
Body and Accessories
🢒
Entertainment
🢒 OnStar Schematics
Figure
1:
Module Power and Ground
Microphone, Keypad, and Voice Signals
Cellular Communication Component Views
Class 2 Serial Data Line (LH Drive) (2 of 2)
Battery Feeds
AUDIO, AUDIO AMP, DIM Fuses
Class 2 Serial Data Line (LH Drive) (2 of 2)
AUDIO, AUDIO AMP, DIM Fuses
G401 (1 of 3)
G401 (1 of 3)
G402 (1 of 2)
G402 (1 of 2)
Figure
2:
Microphone, Keypad, and Voice Signals
Module Power and Ground
VIU to VCU Signals
Cellular Communication Component Views
Vehicle Interface Unit (VIU), Microphone, Radio Amplifier
Vehicle Interface Unit (VIU), Microphone, Radio Amplifier
Figure
3:
VIU to VCU Signals
Microphone, Keypad, and Voice Signals
Cellular Communication Component Views
G303, G304, and G307