Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Hummer H3 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Section 11 (Cellular System, Entertainment System, And Navigation System)
WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Diagnostic Starting Point - Cellular, Entertainment, and Navigation
- DTC B1025, B1035, B1045, or B1055
- DTC B1259
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Diagnostic Aids
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit System Verification
- Circuit/System Testing
- Repair Procedures
- DTC B2455
- DTC B2470
- DTC B2476 or B2482
- DTC B2483 or B2484
- Symptoms - Cellular Communication
- Symptoms - Entertainment
- Digital Radio Malfunction
- OnStar Global Positioning System (GPS) Data Not Current or Inaccurate
- OnStar Microphone Inoperative - Caller Cannot Be Heard
- No (or Noisy) OnStar Audio
- OnStar Button LED Inoperative
- OnStar Call Center Remote Function Requests Inoperative
- OnStar One or More Buttons Inoperative
- Radio Displays CAL or CAL ERR
- Radio Displays LOC, LOCKED, or CODE
- Radio Poor Reception
- Speaker Replacement Reference
- Speaker Malfunction
- Unable to Contact OnStar Call Center
- OnStar Voice Recognition Inoperative
- Repair Instructions
- OnStar Button Assembly Replacement
- Mobile Telephone Microphone Replacement
- Communication Interface Module Replacement
- Compact Disc Care and Cleaning
- Radio Replacement
- Digital Radio Receiver Replacement
- Navigation Control Processor Bracket Replacement
- Mobile Telephone Digital Antenna Replacement
- Cellular Communications/Digital Radio Antenna Replacement
- Cellular and Navigation Antenna Assembly Replacement
- Fixed Antenna Mast Replacement
- Digital Radio Antenna Replacement
- Digital Radio Antenna Cable Replacement
- Antenna Cable Replacement
- Radio Antenna Cable Extension Cable Replacement
- Mobile Telephone and Navigation Antenna Coaxial Cable Replacement (UE1)
- Mobile Telephone and Navigation Antenna Coaxial Cable Replacement (UE1, U2K)
- Radio Front Side Door Speaker Replacement
- Radio Rear Side Door Speaker Replacement
- Description and Operation
- OnStar Description and Operation
- Notes
- Communication Interface Module (CIM)
- OnStar® Button Assembly
- OnStar® Microphone
- Cellular and GPS Antennas
- Audio System Interface
- OnStar® Steering Wheel Controls
- OnStar® Sleep Cycle
- Features
- Deactivated OnStar® Accounts
- OnStar® Cellular, GPS, and Diagnostic Limitations
- Mobile Identification Number and Mobile Directory Number
- Operation of the OnStar® Speech Recognition Systems
- Radio/Audio System Description and Operation
- Notes
- Radio Circuit Operation
- Antenna System
- AM/FM Reception
- Digital Radio Receiver (if equipped)
- Speaker Operation
- Audio Amplifier (If equipped)
- Radio Data System (RDS) (If equipped)
- RDS Messages
- MP3/CD Formatting Information for MP3/CD Radios
- Integral Multi Disc CD Changer (IMDX) (If equipped)
- Theft Deterrent
- Radio Error Messages
- OnStar ® (if equipped)
- Using the Auxiliary Input Jack (if equipped)
- Speed Compensated Volume (If equipped)
- OnStar Description and Operation
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.