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1999 Pontiac grand prix has heat one day and not the next day?

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  • 1999 Pontiac grand prix has heat one day and not the next day?


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Answer #1 | 09/12 2013 15:49
Busted thermostat
Answer #2 | 09/12 2013 15:53
Engine temp ok? Then heater core or supply to or from blocked. If engine itself runs cold? Change thermostat. Ensure no air pockets when refilling. Use anti freeze to 50-50per cent.

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