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Invisible trailer camera

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I have a 2020 GMC Sierra 1500 Denali with the invisible trailer camera. It worked flawlessly the first winter. However, every time the trailer was hooked up I would get a message stating that the system did not recognize the electric brakes yet the system controlled the electric brakes. In the spring of 2021 I took it to the dealer and they said it required a software reflash. Ever since then I have to recalibrate the trailer camera every time the ignition is turned off and then back on. It has been to the dealer at least six times. GM engineers have worked on it 3 times and one time they brought the supplier with them. Several weeks and several modules later it still does not work correctly. Once the calibration is complete it does not write to memory so it can be recalled the next time the ignition is cycled. Does anyone have any suggestions?

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