So I had all my shocks and ball joints and radiator replaced and got ready to start it. The lights will come on but that's it. No start doesn't try to turn over nothing. I put a OBD2 on it and it says lost communication with ecm/pcm A.

 

The first thing you might check is ALL the fuses.
It does sound like you lost power to the inside of the vehicle.
If that all checks out OK, then you need to check for power to pin 16 of the diagnostic plug.
Before going any further what kind of test equip do you have? Test light or multimeter?
If you want to recheck your work and look for a ground wire that you might have knocked loose or off.
Once we have some idea of what you have to work with , maybe we can help you check for power and grounds.