Okay, I prepared a diagram of the fuseblock from my 2003 manual and I circled the starter relay. But just as I was about to attach it to this post it dawned on me that any criminals in the audience would then know precisely which relay must be present for the vehicle to start. Hence, if they encountered a truck they were trying to steal whose starter was doing nothing, they could check the fuseblock, install a relay, and be on their way.
Is that a realistic fear? Should I post the diagram or not?
[Of course, on the other hand when I removed mine the first time I simply looked at the diagram that's provided on the backside of the fuse panel lid. I removed the one that was labeled "STARTER". I assume they removed the label on 2004-up trucks, since no one else seems to know which one is the starter relay. ]
-Ryan