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#1
12-02-2008, 09:09 AM
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Another '02 Grand Prix Heat Question
Hello,
My Daughter has an '02 GP. When she starts car to warm it up since the cold days have hit us, it appears that the heat does not work. However, if she gets in the car and drives it, it warms up. A couple of things have crossed my mind about this, one being a stuck-open thermostat, and the other, a bad vacuum operated hot water valve. The latter I am not sure of because I do not know what type of control valve they use on that car. Anyone have any ideas on this? Any help would be greatly appreciated, and many thanks in advance. 
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#2
12-02-2008, 09:59 AM
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Re: Another '02 Grand Prix Heat Question
It would help to post what engine or GP model.
What does the temperature gauge at the IP indicate after proper engine warmup? As far as a hot water valve there is none at the input of the heater core. It is constant flow of coolant through the heater core. How do the heater hoses at the firewall for the heater core feel?
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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#3
12-02-2008, 10:48 AM
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Re: Another '02 Grand Prix Heat Question
How is the coolant level? Its not low or leaking is it?
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-2000 Grand Prix GTP 170,000mi (daily driver) -2000 Olds Alero 100,000mi (soon to be DD with gas at $3.45/gal) -1997 Chev K1500 4x4 115,000mi (Natalie's truck [nans_grandprix]) AF "2.0" Community Guidelines Conservative Victory 2012!!! "I'll Keep my Guns, Freedom, and Money. You can Keep the Change!" ----->>>>> Did You Know? <<<<<-----
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