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 MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 98 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESAUXILIARY AUDIO INPUT MALFUNCTIONCIRCUIT/SYSTEM VERIFICATION
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol
Circuit/System Verification
2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.
- Verify DTC B124B is not set. Since occurrences of this DTC can be caused by an incompatible or faulty USB device, review with the customer the conditions under which their concern occurred.
- If DTC B124B is set.
Refer to Circuit/System testing.
- Go to next step: If DTC B124B is not set.
- If DTC B124B is set.
- Ignition ON, infotainment system ON.
- Connect a compatible USB device to the USB port and attempt to play audio from a comparable know good vehicle.
- Verify audio is heard through the infotainment system while operating the USB device.
- If audio is not heard
USB device is not compatible, try a different USB device.
- Go to next step: If audio is heard
- If audio is not heard
- Connect a compatible USB device to the USB port and attempt to play audio from the customers vehicle.
- Verify audio is heard through the infotainment system while operating the USB device.
- If audio is not heard
Refer to Circuit/System Testing
- Go to next step: If audio is heard
Go to next step: All OK
- If audio is not heard
RENDER: 1.0x
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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.