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.
Circuit/System Verification
2018 Chevrolet Tahoe FL, 4WD, GasSECTION Circuit/System Verification
- Ignition ON.
- Verify DTC B390F 4B is not set.
- If the DTC is set
- Program the K157 Video Processing Control Module.
- Verify DTC B390F 4B is not set after programming and performing Video Processing Control Module Calibration .
- If the DTC sets after programming, replace the B174G Frontview Camera - Grille.
- If the DTC does not set
- All OK.
- Go to next step: If both DTCs are not set
- Verify DTC B390F 66 is not set.
- If the DTC is set
Remove the B174G Frontview Camera - Grille and reinstall
- Go to next step: If the DTC is not set
- If the DTC is set
- Verify DTC B390F 08 is not set.
- If DTC is set
Refer to Circuit/System Testing
- Go to next step: If DTC is not set
- If DTC is set
- All OK.
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.