I took the 2021 telluride sx back to the dealership. They again couldn’t get any active codes. We took it for a test drive. Got a message radar blocked . Mechanic said that is normal that it’s for highway driving not city driving, too many traffic lights were affecting the unit and the road lines are too close or the sun is blinding it or my IPhone is interfering it’s signal. That they would have to keep it several days and test it on the highway (hopefully not shopping runs) so I said fine.I am having similar problems since i got my 2021 telluride sx. i will be taking it back to the dealer for the third time . I get fca warning ,radar blocked , cruse control not working , info screen blanked out. all at ramdom times . talked to corporate and they gave me a work order number to track further service problems. not happy with no error codes no problem found.