This truck is going to be the death of me. Got it fully fired up last night. ran great. Idled good and revved up good. No noticeable white smoke. let it sit last night and came out this morning to check the oil before trying it on the road and noticed the oil was way too full. Pulled the drain plug and about a gallon of coolant came out. I'm wondering where to even start? could be a freeze plug behind the front cover, water pump, oil cooler, head gasket, injector cup, cracked cylinder? The amount and clarity of the coolant leads me to believe it if was a head gasket, I would have noticed a substantial amount white smoke or rough running.