Question about 1999 Pontiac Montana
Alright here goes the van probably has the 3.1 or the 3.4 engine the engine is fited with a bleeder valve that when you change your coolant or change a thermostat you will have to bleed all the xtra air that is in the lines if you dont the antifreeze will not circulate and causes no heat and could also cause your engine to overheat tearing up your engine. make sure you find the bleeders and get all the air out and you should have heat. hope this helped
Posted on Jan 03, 2011
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Posted on Jan 02, 2017
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