Quick and simple.... WHERE IS IT???!!!

I've been told that's likely my cruise problems, but can't even find it! Parts guys gave me a picture, and of course didn't know where it was on the truck, and I didn't have the brains to go ask a service guy.

I want to find it, then trace and check all the lines and wires first, before replacing.

Whats happening is, it acts as if you shut the cruise off, then hit resume in a second or two. Very intermitant, but when it does act up, it will do it all day. Then be good for 1 or 2 days, then act up again.

(Guess that wasn't real quick and simple! )