B127B GMC Possible Causes
- Faulty Rearview Camera
- Rearview Camera harness is open or shorted
- Rearview Camera circuit poor electrical connection
- Faulty Human Machine Interface Control Module
How do I fix code B127B GMC
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
Cost of diagnosing the B127B GMC code
Labor: 1.0The cost of diagnosing the B127B GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B127B GMC Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B127B GMC MeaningWhen the vehicle is placed in reverse with the engine running, a voltage signal is sent to the rearview camera to turn on and send a video signal to the Human Machine Interface Control Module. If the Human Machine Interface Control Module does not see a signal from the camera it will set B127B 2B and display Service Rear Vision System.
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