I stuck with the Coleman/Mach RV brand, but went from an anolog one to a digital one that had the 1 degree variance. Some have used the household ones from Home Depot or Lowe's. Mine was a simple wire for wire exchange and fit exactly as the factory one did...check out Amazon for the Coleman/Mach, that was the best price I found by a long shot.
2011 GMC Sierra 2500HD
2014 Rockwood 8289WS, Diamond Pkg.