2002 suburban 5.3. No spark. No injector pulse no fuel. No. Security light

2002. Suburban 5.3. No spark no injector pulse. No. Signal. From the ecm to the. Fuel pump relay. I got. Waveform. From the. Crank. Sensor. And. Cam sensor. I do t have any security light flashing. Or. On. It come on when i open the door. But. Then after close. Goes off. Im lost. Any help please. I was thinking. The ignition. Switch. How do i test. The. 3 wires on top of the ignition. Switch ? Or. Any. Idea. ? Thank you. This is. The way form. From the crank.

Check powers and grounds first at the ignition coils while cranking to load test them

I got power and groundS

Very hard to understand but it very well could be the switch. I don't have access to a schematic at the moment. If someone could post it maybe we can help.

Thank you for responding. Well if you see. The picture of the waveform I got good Signal from cam and crak sensors. And they synchronized.
I know sometimes. The theft system activated and wont let you truck starts. Like no pulse at the injectors . And. No spark. But this time i dont see That light. Flashlight. Or stay on. Its. Just. Come on for. 3 seconds then goes off.