[Ramman]

I have a 93 dak and it will run for about 15 to 20 min and then quit. Won't start but will act like it wants to, if you wait about an hour it will start and run for another 15 to 20 min. I changed the fuel filter, but still does the same thing. I was thinking that it was the fuel pump, but am not sure. I have about 188K on the truck. What do you thinK?