Not cranking over

Turn the key and no crank. I have pulled the starter and it tested good, battery has been load tested and good, checked all fuses and swapped relays around with known working relays. Replaced the neutral safety switch, which is also the gear position indicator. I did notice the gear position lights in the dash are not lighting up when the key is in the run position like usual. When I plugged my scan tool in the gear position lights come on and I can hear the starter solenoid click when I try to start. Car has an alarm and I have set the alarm with the fob, unlocked and no change. Locked and unlocked by key and no change. When the scan tool is not plugged in and I turn the key to run I can also hear the vacuum switch on the engine by the fuel pressure regulator rattling fast. This stops too when I plug in the scan tool. The scan tool cannot read the ECM either. The only driving issue I have had recently is the fuel level gauge stops working when I fill up, it starts working when I get under 3/4 full, code P0435 I believe. Fuel pump was replaced about a year ago.