2022 Tahoe/Coolant Temp light...and temp?

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ILop

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Has anyone had any more info on this. This has happened twice on our 22 YUKON, went to dealership thinking it was a sensor. They ran scans onit and then asked if it had been responding slow. I hadn’t noticed. They said the only found some communication codes that they couldn’t not replicate and then all but kicked me out the door. They would not give me any paperwork on what they saw or that they had even checked it. Told me to bring it directly in the next time the light comes on and don’t turn the car off so they can check it. Any thoughts?
 

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