2002 Pontiac Grand Prix Car Alittle Heat Down Road Blows Cold Air Sitting Idle

2002 PONTIAC GRAND PRIX
180 MILES
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IMSTUMPED
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Car has alittle heat going down the road, but blows cold air sitting at an idle.
Already had radiator flushed, changed thermostat, and radiator cap. Changed out the heated core about 2 years ago.
Dec 28, 2012 at 4:34 PM
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