It been fixed. I reversed the lines going into heater core and it works great. It has a new blend door anyway they replaced it when replacing heater coil. Thanks
Didn't work. I think it maybe the water pump. It doesn't have sysymptons of head gasket. I have had so much trouble out of this thing but have too much money invested to sale
Posted on its on thread yesterday but not much response. My 99 expy has heat for a little while then on longer driving about twenty minutes it starts loosing heat. It has a new front heater core,new tstat,new top hose. The rear doesn't heat and needs a coil. Could it be the water pump or air...
I will try the air bleed first. Is it anyway it could be the water pump? Or the rear heat causing it. The rear doesn't work at all even after flushing. It needs a core
My 99 expy has a new front heater core,new tstat, and has been flushed several times but the heat comes and goes. Has good heat then after driving 20 minuits the heat goes away. I need help bad. This thing has drive me nuts. The blind door is new also. The heater hoses are both hot to begin with...
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