I have a 97 K1500 with a 5.7L 350. Not long ago it sat for about a month. After fixing the issue that caused it to sit I changed the fuel filter and made sure the fuel was good. It started right up. After driving for about 5-10 minutes it just quit running. No check engine light. The fuel pump is relatively new and is working fine. It will not start back up until it sits for a little while. Then the same thing happens again. Changed the MAP sensor and it still does this. I'm at a loss.