For 1990-2009 cars

# Body and Accessories

## All Component Locator

- Cellular Communication Component Views

## All Description and Operation

- OnStar Description and Operation

## All Visual Identification

- Cellular Communication Connector End Views

## Diagnostic Procedures

- Diagnostic Starting Point - Cellular Communication
- Diagnostic System Check - Cellular Communication
- OnStar Audio Malfunction
- OnStar Button LED Malfunction
- OnStar Button Malfunction
- OnStar Call Center Remote Function Requests Inoperative
- OnStar Global Positioning System (GPS) Data Not Current or Inaccurate
- OnStar Microphone Malfuncation
- OnStar Reconfiguration
- OnStar Symptom Diagnosis
- OnStar Voice Recognition Malfunction
- Symptoms - Cellular Communication
- Unable to Contact OnStar Call Center

## Diagnostic Trouble Codes

- Diagnostic Trouble Code (DTC) List
- DTC B2455
- DTC B2470
- DTC B2476
- DTC B2482
- DTC B2483 or B2484
- DTC U1500

## Electrical/Electronic Schematic Diagrams

- Cellular Communication Schematic Icons
- OnStar Schematics

## General Diagnostic Information

- Scan Tool Data Definitions
- Scan Tool Data List

## Mechanical Specifications

- Fastener Tightening Specifications

## Removal, Installation, and Replacement

- Communication Interface Module Replacement
- Mobile Telephone Antenna Inner Coupling Replacement
- Mobile Telephone Antenna Outer Coupling Replacement
- Mobile Telephone Microphone Replacement
- Navigation Antenna Replacement