Question about 2000 Pontiac Grand Prix
Gday mate,geoff here, try lifting up the carpet to see if it is wet, if it is then it's a leak in the heater core/hoses under the dashboard, hope this helps,geoff.
Posted on Feb 11, 2012
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Posted on Jan 02, 2017
at first i just bypass the heater core assem. go from the thermm. housing to the head nipple. if you put your heat setting to hi setting all your coolant will pour out that nipple with no hose. if you drive like that BOOM! engene blows the heater hose assembly replacement for that is $90+tax and thats bs. ireplaced mine with 2 tees it works great! it runs cooler than it ever has and the heater works when you need it. that assembley has a thermal crossover valve in it and i find no reason for it other than the heater may work a couple min. sooner.And or the coolant that ain't worth $90bucks+tax to me.i can wait a couple min, longer for the heater to work i used the tees to maintain water flow through the head nipple back to the rad,when heater is not in use. incase that was the purpous of the thermal valve crossover. i could find no one who could tell me its intened purpous at any parts store or even the GM dealership.
Posted on Dec 07, 2011
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