I have a 07 chevy lbz with 86k miles on it, and im leaking coolant slowly, i thought it was from heater core adapter coming out of the fire wall but its not, its not the egr because that is fully removed, its not the heater core line and nothing els i can see on top of the engine. I can see coolant dripping down from where the block meets the head on the rear passenger side of the block, and then drips down to my oil pan then to the ground. I am hoping it is not an external gasket leak i know that is more common for the 07 lbz gaskets to leak externally first, no white smoke and the upper coolant hose is never hard. Any ideas? Here are some pictures