Body and Accessories

All Component Locator

• Cellular Communication Component Views
• Cellular Communication Components

All Description and Operation

• OnStar Circuit Description
• OnStar Description
• OnStar Operation

All Visual Identification

• Cellular Communication Connector End Views

Diagnostic Procedures

• Diagnostic Starting Point
• Diagnostic System Check - Cellular Communication
• OnStar Audio Malfunction
• OnStar Button LED Malfunction
• OnStar Button Malfunction
• OnStar Call Center Exterior Lamp Command Inoperative
• OnStar Call Center Horn Command Inoperative
• OnStar Call Center Lock/Unlock Commands Inoperative
• OnStar Call Center Unable to Configure OnStar (R) System
• OnStar Call Center Unable to Locate Vehicle
• OnStar Operator Unable to Hear Caller
• OnStar Reconfiguration
• OnStar Will Not Power Up
• Symptoms - Cellular Communication
• Unable to Contact OnStar Call Center

Diagnostic Trouble Codes

• DTC B1000 ECU Malfunction
• DTC B1004 Keep Alive Memory (KAM) Reset
• DTC B1009 EEPROM Checksum Error
• DTC B2462 GPS Signal Error
• DTC B2476 Cellular Phone Select Service Switch Malfunction
• DTC U1500 Inter-Device Dedicated Bus Malfunction

Electrical/Electronic Schematic Diagrams

• Cellular Communication Schematic Icons
• OnStar Schematics

General Diagnostic Information

• Diagnostic Trouble Code (DTC) List/Type
• Scan Tool Data Definitions
• Scan Tool Data List

Removal, Installation, and Replacement

• Mobile Telephone Antenna Replacement
• Mobile Telephone Microphone Replacement
• OnStar Button Assembly Replacement
• OnStar GPS Antenna Replacement
• OnStar Vehicle Communication Unit Replacement
• OnStar Vehicle Interface Unit Replacement