I have a 2006 Silverado LT3. When I push the button for the heat on the seats the light on the switch comes on for a split second then goes off. I have noticed if I will be moving the seat with the control button and while the seat is moving the heated seat light stays on. As soon as I stop moving the seat it goes off. My thinking is there is a short in the ground for the heat and when I'm operating the seat it's getting it's ground from another source. Does anyone have any knowledge of this or know where I might get a wiring diagram for this? Thanks for taking the time to read this.

 

Yes it does sound like a short in the ground

 

the element in the seats do short out. find the connector to the seat heater, disconnect it and take and ohm reading.