Chevrolet Avalanche Seat Heater Switch

When I Push The Back Heat On Driver It Works Fine When I Use Either Heat On Passenger They Both Work Fine But As Soon As I Push Te Button...

Indicator Lights Flash And Click/sound From Under Seat Is Heard When Either Sides Heat Button Is Pushed. No Heat In The Seat Is The Problem.

The Past 2 Years My Seats Have Been Shutting Off By Themselves. It Started Randomly Now The Button Has To Be Pressed Repeatedly Till It...