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.
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HOMESERVICE MANUALSCHEVROLET2018SONIC PREMIER, 4D SEDAN, AUTOMATIC TRANSREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTINFOTAINMENTCELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM
2018 Chevrolet Sonic Premier, 4D Sedan, Automatic Trans
Cellular System, Entertainment System, And Navigation System
2018 Chevrolet Sonic Premier, 4D Sedan, Automatic TransSECTION Cellular System, Entertainment System, And Navigation System
- Specifications
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- DTC B0560
- DTC B1025, B1035, B1045, or B1055
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B124B
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC B124F
- DTC B125A
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC B125C
- Diagnostic Instructions
- DTC Descriptors
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC B1271
- DTC B1446 or B1447
- DTC B2455
- DTC B2462
- Diagnostic Instructions
- DTC Descriptors
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC B2470
- DTC B2476 or B2482
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- Symptoms - Cellular Communication
- Symptoms - Entertainment
- Application Malfunction
- Auxiliary Audio Input Malfunction
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- Bluetooth Malfunction
- Digital Radio Poor or No Reception
- Diagnostic Instructions
- DTC Descriptors
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- Phone Projection Malfunction (Apple CarPlay)
- Phone Projection Malfunction (Android Auto)
- OnStar Microphone Malfunction
- OnStar Audio Malfunction
- No Global Positioning System (GPS) Reception
- Diagnostic Instructions
- DTC Descriptors
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- OnStar Button LED Malfunction
- OnStar Call Center Remote Function Requests Malfunction
- OnStar Button Malfunction
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- 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 Instructions
- OnStar Steering Wheel Control Functions Malfunction
- Radio Poor Reception
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- Speaker Replacement Reference
- Speaker Malfunction
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- Unable to Contact OnStar Call Center
- OnStar Voice Recognition Malfunction
- Voice Recognition Malfunction
- Repair Instructions
- Mobile Telephone Microphone Replacement
- Communication Interface Module Replacement
- Communication Interface Module Battery Replacement
- Wireless Communication Interface Antenna Replacement
- Communication Interface Module Bracket Replacement
- Radio Bracket Replacement (IOA)
- Radio Replacement (IOR)
- Audio Disc Player and USB Receptacle Replacement
- Radio Antenna Base Replacement
- Radio Antenna Replacement
- Radio and Telephone Control Switch Replacement
- Digital Radio, Mobile Telephone, and Vehicle Location Antenna Cable Replacement
- Radio Antenna Cable Replacement
- Radio Windshield Side Garnish Molding Speaker Replacement
- Radio Front Side Door Speaker Replacement
- Radio Rear Side Door Speaker Replacement
- Description and Operation
- OnStar Description and Operation
- Notes
- Telematics Communication Interface Control Module
- OnStar® Three Button Assembly
- Secondary OnStar® Controls
- Microphones
- Cellular and GPS Antennas
- OnStar® RemoteLink
- Compass Heading
- Bluetooth®
- Back-up Battery
- WiFi Support
- Audio System Interface
- OnStar® Sleep Cycle
- Features
- Teletypewriter (TTY) Users
- Deactivated OnStar® Accounts
- OnStar® Cellular, GPS, and Diagnostic Limitations
- Mobile Identification Number and Mobile Directory Number
- Radio/Audio System Description and Operation
- Notes
- Radio Circuit Operation
- Information Display and Controls
- Antenna System
- Radio Reception
- Digital Radio Receiver (If equipped)
- Speaker Operation
- Audio Amplifier (If equipped)
- WiFi
- Valet Mode
- Teen Driver
- Theft Deterrent
- Bluetooth® (If Equipped)
- Bluetooth® Features Supported
- USB Port and Auxiliary port (If equipped)
- OnStar ® (If equipped)
- Steering Wheel Controls (If equipped)
- Speed Compensated Volume
- Firmware Over The Air
- Active Noise Cancellation (If equipped)
- OnStar Description and Operation
- Special Tools and Equipment
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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.