I have a 2008 suburban with the manual HVAC control (P/N 25901393) and I am looking to upgrade to the automatic control (P/N 25936130). Both have 4 plugs in the back and three out four have the same call out and color. The one that is different (j3) is blue on my current controller and black on the replacement. Am I going to be okay switching them out or is it going to explode my ac controls?