GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
1998
🢒
Jimmy - 2WD
🢒
Body and Accessories
🢒
Cellular Communication
🢒 OnStar Schematics
Figure
1:
Cell 154: Vehicle Interface Unit (VIU)
Cellular Communication Components
OnStar Circuit Description
Cell 154: Vehicle Communication Unit (VCU) and Floor Handset
OBD II Symbol Description Notice
OBD II Symbol Description Notice
OBD II Symbol Description Notice
OBD II Symbol Description Notice
Radio/Audio System Schematics
Ground Distribution Schematics
Power Distribution Schematics
Figure
2:
Cell 154: Vehicle Communication Unit (VCU) and Floor Handset
Cellular Communication Components
OnStar Circuit Description
Cell 154: Vehicle Interface Unit (VIU)