GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 Yukon - 4WD 🢒 Body and Accessories 🢒 Cellular Communication 🢒 OnStar Schematics
Figure 1:

Ignition Switch, RAP Relay
Object Number: 612182 Size: FS
Cellular Communication Components
OnStar Description
Power, Ground, and DLC
Power Distribution Schematics
Power Distribution Schematics
Retained Accessory Power (RAP) Schematics Pickup
Power, Ground, and DLC
Figure 2:

Power, Ground, and DLC
Object Number: 612183 Size: FS
Cellular Communication Components
OnStar Description
Keypad, VCU, VIU, Microphone
Ignition Switch, RAP Relay
Power Distribution Schematics
Power Distribution Schematics
Ignition Switch, RAP Relay
Power Distribution Schematics
Power Distribution Schematics
Data Link Connector Schematics
Ground Distribution Schematics
Ground Distribution Schematics
Figure 3:

Keypad, VCU, VIU, Microphone
Object Number: 612184 Size: FS
Cellular Communication Components
OnStar Description
Radio, Remote CD Player, VIU
Power, Ground, and DLC
Figure 4:

Radio, Remote CD Player, VIU
Object Number: 612185 Size: FS
Cellular Communication Components
Keypad, VCU, VIU, Microphone