03 silverado 5.3 no start

My 5.3 will not start. Thought it was fuel pump but after putting in brand new fuel pump still wont kick on. It did for a few seconds when i first put it in but after it died hasnt been able to start for a few days. Any ideas? Could really use the help

You ever get it started?

Sent from my SAMSUNG-SM-G891A using Tapatalk

grounds check all grounds just went thru this with a 04 2500 hd 6.0 replaced the power steering pump and did a tune up was working great returned it to my buddy put the plow on it went to leave his lot to give me a lift home and blah cut right out in middle of the street.spent the next week chasing the problem.there are a small group of grounds on the left side of truck at the rear cab mount start there make sure the surface is clean where they are attached,also some at the front cab mount same thing there make sure the eyelets are good to the wire not broken under the coating on wire,also the ones to the back of the engine large braided one and some have one on pass rear of the block hope that helps

I got it running, cleaned up some grounds i could find, but now my antitheft wont work and service airbag goes on and off, but it drives down the road!