Won’t start, I have replaced the camshaft sensor?

Hello my 03 envoy won’t start, I have replaced the camshaft sensor, crankshaft solenoid, and the ecm which was vin programmed. I also changed the two front wheel hub assemblies and abs sensors, I have a new battery as well. When I had the old ecm on it wouldn’t start and a friend told me to do a 24 hr hard boot to see if that would work, and it did. The car started but was idling rough and giving me the multiple misfires code, so I decided to get a new ecm module, vin programmed, and after installing it it does not start. I have done the 30 minute relearn procedure as I seen on utube twice, even doing it five times instead of the three time cycle and car still not starting. What other problem could it be now?