I have a 2003 Suburban 1500 LT (bought used) that has side view mirrors with turn signals, but they are not heated. Do all Chevy Suburbans (or any vehicle for that matter) have all the same wiring harnesses, so that if I bought a heated side view mirror with turn signal, I could plug it in and make sure there are the necessary fuses in place for it to work? Or, to upgrade the mirrors, would I also have to supply the wiring?