2007 Yukon Seat Heaters

[Amanda]

I have a 2007 Yukon that has remote start. When the temp is below a certain degree the seats turn on to high so they are warm by the time I get in. Last year the dealership said my battery was bad and changed it out. After the battery was changed the driver side seat does not come on with the auto start. The passenger seat works just fine. It has been cold enough for the passenger set to come on numerous times. I have tried resetting to factory default setting and the driver side still will not turn on with auto start. When I turn the key to run and hit the button for the seat it comes on and stays on so I know the heater is working. Any ideas?? The dealership wants big bucks to try to figure this out.