Try to replace the starter relay
dont no
Check for fuelCheck for spark
because its out of gas
Low battery voltage .?
What is it doing? ddus it turn over but just wont start?
what kind of car 2002 Pontiac grandam se 2.2
Neutral switch?
compression? bad/worn/broken timing chain..
Piston heater element open.
your fuel pump could be bad if it runs for a few seconds .
Your battery is dead (even though you have some power), jump start it and when car is running test voltage to see if alternator needs to be replaced. Also ensure battery terminals are properly secure if you have no luck.
Is your parking brake on?