Body and Accessories

All Component Locator

• Cellular Communication Component Views
• Cellular Communication Components

All Description and Operation

• Cellular Telephone Circuit Description
• OnStar Circuit Description
• OnStar Description
• OnStar Operation

All Visual Identification

• Cellular Communication Connector End Views

Diagnostic Procedures

• Diagnostic Starting Point
• OnStar Audio Malfunction
• OnStar Button LED Malfunction
• OnStar Button Malfunction
• OnStar Call Center Lock/Unlock Commands Inoperative
• OnStar Call Center Unable to Configure OnStar (R) System
• OnStar Call Center Unable to Locate Vehicle
• OnStar No or Poor Cellular Reception
• OnStar Operator Unable to Hear Caller
• OnStar Reconfiguration
• OnStar System Check
• OnStar Will Not Power Up
• Symptoms
• Unable to Contact OnStar Call Center

Diagnostic Trouble Codes

• Diagnostic Trouble Code (DTC) List/Type
• 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 Telephone Schematics
• OnStar Schematics

General Diagnostic Information

• Scan Tool Data Definitions
• Scan Tool Data List

Mechanical Specifications

• Fastener Tightening Specifications

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
• Vehicle Locating Antenna Ground Plate Replacement