I recall reading a member here added heated seats to a 00-05 monte and it was plug-n-play. The wiring is supposed to under the carpet for the seats. Then swap in the button panel and your done.
That's what I recall.

 

BUMP!!!!

So I started this thread back in June of 2013 when I bought a set of used 2007 Monte Carlo leather seats to swap out with my 2004 Monte Carlo cloth seats. I got the seats in that summer but I never hooked up the heated seats and would like to do so now. I did not originally have heated seats so I don't have the switches on the center console.

I need info from anyone that knows anything about the switches, relays wiring off the seat.... etc.