My 1999 chevy silverado starts and dies within two seconds. has anyone had this experience before and how did you fix it?

You just go to the link I attached I'm sure you will get the solution of your problem Chevy Tracker 1999 2004 Factory Service Workshop repair manual download

start chasing wires. Sounds like something is shorted or worse, a hot wire may be grounded out.
Good place to start is all wires headed to the started as that is a common place for a power wire to melt against hot exhaust.
(that was the case for my 99 chevy)
Check all other fuses and make sure none are blown.

Can you hear the relay turning on when you first turn the ignition on? Should clickon and off within the first 2-3 seconds.

check the spark plug wires and see if u have a distributor cap might need to do a tune up if it will start after it dryes spray a little water over it and see if the problem reapears sounds like you have some bad spark plug wires

What have to do is check the fuel pressure when it dies.What you do is hook up a fuel pressure tester and when you go to drive it check and see if you are loosing pressure.If you do loose pressure then check the connections to the pump and make sure you are getting power to it.If it was fine after the repair shop fixed it I don`t believe it has anything to do with this.I don`t think the relay is bad because they usually don`t go bad.If you want to make sure then you can swap it with another relay that is the same from the fuse block.Hope this helps.Good luck.

Wouldn't happen to be a diesel, would it? If so, do a search on ebay for a remote fsd/pmd module. Fixed my 95 'rado (in less than 20 minutes) with a 6.5 turbo diesel -it would stall wherever and whenever it wanted, without warning.

listen to see if the fuel pump is kicking on.

check your pick up sensors

sounds like you have the plug wires on the cap mixed up. reccomend recheck the order and make sure they are in the right order

The fuel pump on that model runs through the oil pressure switch so that if the truck looses oil pressure,It kills power to the fuel pump to prevent engine damage.you need to find the cause of the low oil pressure reading(possibly a bad oil switch).That would be the cheapest place to start,or have it checked with a mechanical gauge.Good luck,
ChevRev