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just had this problem with my 97. if your car blows alot of white smoke or has coolant in the oil it would be the head gasket which is usually the culprit to the no heat thing from what I've been told. in my case i got LUCKY. pull the front passenger side up on a curb start the car with the heat on high, take off the reservoir cap and keep filling with engine coolant as needed. rev the engine a little every couple minutes and watch the air bubbles come into the reservoir from the lower hose. now my friend you have "burped" the coolant system. if you still don't have heat or a blown head gasket check the interior floor and see if it is wet. then it would be a heater core.

good luck

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