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 MANUALSCHEVROLET2025TRAVERSE HIGH COUNTRY, FWDREPAIR AND DIAGNOSISELECTRICALBODY ELECTRICALPOWER OUTLETSDIAGNOSTIC INFORMATION AND PROCEDURESDTC B1A4BCIRCUIT/SYSTEM TESTING
2025 Chevrolet Traverse High Country, FWD
Circuit/System Testing
2025 Chevrolet Traverse High Country, FWDSECTION Circuit/System Testing
WARNING:
To help avoid personal injury, always treat the accessory power receptacle, accessory DC/AC power inverter module, AC circuit wires, and connectors as if AC high-voltage is present.
- Ignition OFF. Disconnect the X1 connector at the T1 DC/AC Converter Control Module. Ignition ON.
- Verify a test lamp does not illuminate between control circuit terminal 1 and ground.
- If test lamp does illuminate
- Test for a short to voltage on circuit 4629.
- If a short to voltage is found, repair the fault on the circuit.
- Go to next step: If a short to voltage is not found.
- Test for a short to voltage on circuit 4628.
- If a short to voltage is found, repair the fault on the circuit.
- Go to next step: If a short to voltage is not found.
- Replace the X50A Engine Wiring Harness Junction Block.
- Go to next step: If the test lamp does not illuminate
- Replace the T1 DC/AC Converter Control Module.
- Clear DTCs. Operate the vehicle under Conditions for Running the DTC.
- Verify DTC B1A4B does not reset.
- If DTC does reset
Replace the K9 Body Control Module.
- Go to next step: If the DTC does not reset
- If DTC does reset
- All OK.
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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.