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2006 Chev Uplander no heat , need help!!


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  • 2006 Chev Uplander no heat , need help!!

    Had my van in a month ago to the dealer to check why I was not getting any heat at idle but only when I drive.
    Had the Dexcool slugde removed and flushed the whole cooling system all the air was removed and a pressure test was done with no leaks detected.
    The thermostat was also replaced.

    Got heat after that was all done , but as of today the problem is back i checked the coolant level and it is right up and the overflow bottle is up were its supposed to be, the temp gauge in the van reads normal operating temp.

    I'm all out of ideas why I don't have heat at idle, does anyone else have any.....
    If it ain't broke,MOD it.
    2010 Chevy Silverado LTZ 6.2Liter 4x4
    "88K1500, SOLD"