How to replace ac actuator on 2006 Chevy Trailblazer

How to replace ac actuator on 2006 Chevy Trailblazer I need to replace the Ac Actuator on my 2006 Chevy trailblazer. I was able to locate the 3 actuators but I'm not sure how to get to them so that I am able to remove and replace them. So if anybody could post a guide, preferably with either pictures or video that would be wonderful.