Pontiac Montana Heater Heater Core

I've Been Trying' To Fix My Wife's Heater .but To No Prevail ,my Last Resource Is To Disconnect Heater Core And Flush It. Blows...

Flushed Heater Core Then Had Heat For One Day And Now Overheats.

I Have A 2002 Pontiac Grand Am Gt. Start The Car The Two Cooling Fans Do Not Come On. The Engine Will Overheat And Water Comes Out Of The...

The Dashboard/under Dash Heater Blows Cool Air But The Rear Duct (to The Second Row Of Seats) Blows Hot Air (as It Is Supposed To). I Took...