1996 K1500 Suburban 5.7L

166,000 miles. I also replaced the crankshaft positioning sensor today, and the ignition control module. It still turns over but no start. When it stops starting a few pops come out of the throttle body almost like its releasing compression

I have a guage and I checked the fuel pressure. It is 60 psi.

I checked the TDC and the cylinder and the rotor line up when cylinder head is at TDC. There is very little play in the timing chain. I am gonna go back to day one when this messed up. The truck has been in the garage for over a year. It was started every onnce in a while to make sure the battery wasnt dead. The day I went to register it, I drove it to a gas station 20 miles away. Put 31 gallons of gas in and got a car wash(underbody wash and all). It was still running in the car wash. I drove it to emissions test center and got out of car while they tested. It passed test, and when I got in to start it I turned the key and the solenoid only clicked. Tried to bang the starter to get it to start. Didnt work. So I towed it home and replaced the starter. New starter in and tried to start and it just turns over and no start. After starter replaced: distributor cap, ignition coil, ignition module, crankshaft positioning sensor, checked fuel pressure with a guage, and checked the timing. STILL NO START. Now maybe the PCM, but I was told it was rare for those to go out. Oh ya I also get a 1351 code--Ignition circuit voltage high. So I still have no idea. Maybe the camshaft sensor? Is that possible? I dont know.