I used my heated seats on my 2015 3500 Chevy just 4 times, pressed the button, heard a click saw the light for the seat flash for a second. And they haven't worked since. The truck was 3 years and 3 months old with less than 10,000 miles on it. Both seats not working. I can't find a fuse marked for the seats. Anyone have any ideas? I am thinking it's a relay, because both elements shouldn't go out at the same time.