I just purchased a used 2008 GMC Savana passanger van. One of the features we miss from our Astro van is the Outside Temp Display. I was wondering if it is possible to add the temperture sensor and would the temp display then show up on the console? I'm assuming all that is missing is the temp sensor and by adding one, the program will detect it and then display the temp. Allong with this question, where would I find the location of the temp. sensor and what would the plug look like?