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06 chevy equinox overheating

I have changed the theremsat , sensor, and water pump but yet it is still overheating and alot of air is coming through the bleeder leeding to beleive there is air in the motor . what could this be ?

If there’s air in the cooling system you will have problems. BIG problems.

ALL of the air must be bled out of the cooling system. It must be filled with coolant only, no air.

have tried bleeding all of the air out but more air keeps coming in from somewere . could it be the intake manifold ?