2002 Chevy Silverado wont start

I have a 2002 silverado with 88000 miles, truck never had a problem until a few days ago. Was driving and it just turned off after trying to start for 5-10 min it started but didn't get the gas right away hesitated then it caught it took me around a mile or so and turned off again the tank was low so I added some fuel didn't help still wouldn't start around 20min later it started and got me home around 2 miles. The next day I tried to start and it started right up went down the street came back parked in the driveway and it turned off not like a sputter only like if you turned off the switch. Since then I took the truck to my brothers house around 10 miles away it turned off twice and then restarted then went off again and never turned on again. Took off the bed to get to the pump but first checked the relay and seems to be working couldn't check the psi because the truck wont start. Don't hear the pump go on though so I'm leaning towards the pump being the problem. Oh I almost for got my service engine light came on and stayed on.I also changed the filter it was bad.