I bough my dad some 6.5" speaker to replace the stock front soeakers and 4x6 plates to replace the rear speakers in his 2003 reg. cab silverado. I got the front speakers replaced fairly easy but have procrastinated on the rear speakers for over 3 months because I dont know how to remove the panels to get to the speakers in the rear. Does any have experience with this type of vehicle and if so could you give me some pointers. I will also need the wire color coding so that I can match the (+) and (-) correctly with the stock wires.