I would agree with above post. I just changed my valve body this past weekend and had to reassemble the thing after it sprung out and fell to the garage floor in several pieces when I removed the bolt that held it all in. I have the GM service manuals on the car that shows this part instlled in place. It is really self explanitory once you drop the pan and see how it is assembled. I put it back together with only a poor illustration located in those manuals.