I have checked the fuel line, fuel filter and fuel pump on my Cavalier. They are all working. I broke down an waited for a couple of hours an it started up. I waited on the tow truck still got it home the next day went out an it wont start.
You will need to determine what the vehicle is not getting. The engine may not be getting fuel injector pulse, spark or both. I have a wonderful chart that goes over the step by steps for diagnosing a no start situation.