Update. I had it towed to the dealer, and they found that the CP3 had failed. He just said something must have broke inside it. They had a used spare they put on for now. They had to order a new one, which I'll get put on when it comes in, but at least I have my truck back.

 

I'm buying an 06. What is the "CP3"? Where is it? And how much is one worth? I'm willing to buy a spare to keep in the truck.

 

The CP3 is the injection pump itself. I am curious as the the cost of that thing too, however I won't buy one until I need it.