Camaro

I think you are in need of a compression test. You should also get the trouble codes read, as you are likely setting several. I don't want to jump the gun and say 'head gasket' based on such a brief description, but it's a possibility.

White smoke = coolant getting into the combustion chamber. On some engines it can be a bad intake manifold or gasket, but the most common cause is leaking head gasket.