2001 Pontiac Grand Am hesitates

If you think it's a fuel related problem, have you ever changed the fuel filter? I'd start with that. If that does'nt work try some gas treatment or fuel injector cleaner thru the gas tank. If that doesn't work check your ignition components: distributor cap & rotor/ignition coils, spark plugs & plug wires, and check your sensors: coolant temp, throttle position, and crank/camshaft sensors, don't forget to check your air fliter too. You might want to take the vehicle to Autozone and have them check for stored codes for free with their scanner.