Not sure if anyone else has or is experiencing this. The heated seats in my 2005 Chevy Trailblazer will work only randomly. Sometimes if I push the buttom they turn on. Other times you can hear the relays clicking but nothing happens, no lights on the switches, no heat - nothing. It's as if you never touched the button at all. This applies to both the driver AND passenger front heated seats. Either they both work or they don't. It's not like one side works and the other doesn't. This problem seems to affect both sides in the same manner. You can hear the relays clicking but nothing happens. Also sometimes after the heated seats have been on there is a constant clicking noise. Like a relay in engaging and disengaging. Anyone have any ideas?