Question about 2003 Pontiac Grand Prix
Hello! It sounds as if you may have a faulty thermostat that is staying open and therefore not maintaining the regular operating temp. This is an inexpensive part and a fairly easy repair to make. The thermostat is located on top right-hand side of the motor. Follow the upper radiator hose towards engine and you will see it connects to a rounded metal housing - that is the t-stat housing. You simply remove the 2 bolts and remove the housing and replace the t-stat.
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Posted on Feb 02, 2010
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Posted on Jan 02, 2017
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