Does leaving the Eco button on damage the engine on a 2011 Equinox? on 2011 Chevrolet Equinox

I just left my Eco button on and now I'm getting told that it has ruined my cam shaft and they will not cover it under warranty.

Asked by for the 2011 Chevrolet Equinox
Total BS.!!!! Check owners manual, if so it is surely in there!
2 answers
Try another dealer! Was your 'check engine' light on? Sounds to me like the 'eco' button isn't very ECOnomical. How many miles on it and did you have it serviced regularly at that dealer?