I have a 09 Laramie with heated seats and steering wheel and they both come on with remote without having to turn them on manualy.They are nice and toasty when I get in the truck when I get off work.

 

I have a 2015 ram 3500 diesel dually and the heat seats do not come on with the auto start. Does anyone know how to turn it on so they come on with the auto start.

 

Check your EVIC. There is a setting in there to sync your climate control, seat heater/cooler with the remote start. Mine only come on when outside temp is below 40F outside.

 

This is an old thread but I am hoping to help someone out. 2009 Ram 1500 laramie. I had been having remote start problems as well as door lock and unlock was very hit and miss for about a year and in this time the winter season rolled through. My heated wheel and seats no longer worked even though it was -30 celcius and the evic was set to comfort settings. I finally did something about the 4 button remote this week, bought a new one from Amazon and went to Dodge to have it programmed. WOW, It hasn't started this good in two years and now my comfort settings work again. turns out the transmitter in the FOBIK was so weak that it would not send the proper signal anymore no matter if I was 1 foot away when I used the auto start.
Of note I have taken both my foiks apart dozens of times and was always able to rig up something inside to make good contact again and get me another couple months. seems it was the transmitter all along and the contacts were just a side problem