Go have Your Fuel Pump REPLACED
If your 2004 Silverado starts and runs for 5 to 8 seconds and then dies, you might have a bad fuel pump or clogged injectors. You could also have an issue with the distributor.
If you are saying the engine starts and runs for 15 seconds and dies and then starts again for another 15 seconds and dies . . . the distributor seems to be doing its job. You might want to check if there is a fuel restriction somewhere (filter or pump).
same problem with our old marquis. catylatic (sp?) converter is plugged remove it
catylatic converter is plugged
if it starts and runs for just a few seconds then dies it is generally a carburetor issue. clean or replace the carb and that should solve your issue.
2007 honda civic starts up then dies
Coolant temp sensor
By A Chevy
Fuel pump is gping out it may have enough fuel to start then it works like a vacuum but the pressure is not enough to keep it going. Same thing happend to my Buick Lasabre.
Possibly a bad alternator or battery.
I would change your fuel filter
Inadequate fuel pressue probably. Check fuel pressure with proper gauge.