Question about Pontiac Grand Prix

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My temp gauge is fluct on my 2005 Grand Prix GXP 5.3L. I'm guessing it may be a thermostat getting stuck? Already replaced the water pump myself. Any advice on this or how to get to the thermostat? Looks like a pain to get to Thanks, -Tony

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How long after water pump did this start fluctuating, loosen rad cap and run engine until fan kicks in ( to purge any air in system) would hurt to squeeze upper rad hose will running to assist in this.

Posted on Apr 25, 2010

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