I have a 2015 Chevy Impala 2LTZ. I live in the Northeast where it can be cold, raining, lots of mud and road salt. A couple months ago my vehicle began giving me a Service Side Blind Zone warning . I looked it up in the forums and it seems that these SBZ sensors can malfunction if covered with mud, dirt, salt, OR if the sensor modules connector attaching them to the electical system and car gets wet. Sounds like a Chevy design problem. A couple days ago I get a letter from CHEVY telling me that I should bring the car to a dealership to be checked and if the issue is water damage to the SBZ sensors/modules they will fix it free of charge. So I bring the car to a dealer and they tell me the issue is not the sensors or the sensor modules but a problem with the from camera. I was told a technician did a scan and got codes B101D and K109. Does this make sense to anyone? Does the front camera have anything to do with how the SBZ sensors or modules work? I'm concerned I'm being scammed here for some unnecessary repairs. Any way to tell if this dealership is being honest with me?