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 MANUALSCHEVROLET2018TAHOE LT, 4WD, GASREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASDRIVER ASSISTANCE SYSTEMSDIAGNOSTIC INFORMATION AND PROCEDURESDTC B390C: LONG RANGE RADAR SENSOR MODULECIRCUIT/SYSTEM VERIFICATION
2018 Chevrolet Tahoe LT, 4WD, Gas
Circuit/System Verification
2018 Chevrolet Tahoe LT, 4WD, GasSECTION Circuit/System Verification
- Ignition ON.
- Verify DTC B390C is not set
- If the DTC is set
- Perform the Radar Sensor Module - Long Range Learn procedure.
- Verify DTC B390C is not set after the calibration procedure has been completed.
- If the DTC is set after calibration, replace the B233B Radar Sensor Module - Long Range.
- Go to next step: If the DTC is not set after calibration
- All OK.
- Go to next step: If DTC B390C 66 is not set
- 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.