Car won't start after changing fuel tank, sending unit and filter - please help.

My gas tank on a 1998 chevy Malibu LS rusted and was leaking. I ordered replacement OEM tank and fuel sending unit. I was able to drop the tank and replace with new tank and new sending unit. The new sending unit required a new harness connection which I replaced with supplied crimp terminal connectors and heat shrink cover. I installed everything, reconnected the battery and then cycled the key several times and tried starting. It cranked but did not start. I cycled the key several more times, like 20+ times and still no luck. I thought maybe I miss connected one of the fuel lines or new harness wires so I dropped the tank again and double checked everything. It seemed all correct so I but it back together and had the same result. I started thinking the fuel filter maybe clogged. While reading about this I also learned about the schrader valve on the fuel injector manifold. Before changing thenfilter I cycled the key to on and depressed the valve stem on the schrader valve to check for fuel. There was just a dribble of fuel. I forgot to mention that the fuel pump can be heard cycling on with the key for about two seconds. Assuming now that the filter really is the culprit. I changed that and tried again. Same result although a little gas seemed to make it because after several cycles with the key the engine fired ever so slightly. I checked fuel at the schrader valve and only a liitle fuel trickled out.

The car was running fine before I replaced everything, what could be wrong. I am about to give up and have it towed to shop to be fixed but am hoping I am missing something simple. I appreciate your help.