98 chevy truck wont run

[deltaecho]

Truck will start for about one second then dies. Have checked fuel pressure--good. Fire--good. Please help

[Jeremy-WI]

Is the security light on?

[deltaecho]

yes, but its been on for the past three years and has not ever seemed to cause a problem. I drove the truck to my Dads house--about 300 miles, no problems. Got in it the next morning and it wouldnt start. Think we are going to reset computer today. Anyone has any other ideas--please let me know.