Sorry for the late reply. Our database seems to show that your blend door actuator is electric not vacuum controlled. I even looked up your temp door actuator in an online parts book, it does show an electrical connector.
Our database on this model year just says c/k series not Silverado. The C is two wheel drive pickup. The K is 4wd pickup, I looked at info for the C series.
Tuesday, March 10th, 2015 AT 2:37 PM