Can someone take a 03 sierra and put in a 04 type steering wheel with the controls in them and get a 04 style instrument cluster that gives all the fuel mileage, etc. i know you have to have a harness from the steering wheel to head unit, but im gonna get a aftermarket head unit and order that harness with it, but i didnt know if i could do this or not? anyone seen this done or know of any problems when doing so?