Question about 2001 GMC Sierra 2500HD

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Upper and lower thermostat on a 6.6 diesel

I was told by the parts store that my truck has 2 an upper and lower thermostat.

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  • bob collins
    bob collins May 11, 2010

    I know there is a question but for the life of me I don't see it



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Yes there are two, one upper front and one right rear. Here are the AC Delco #'s Source:

ACDELCO Part # 131163 Upper and lower thermostat on a 6.6 diesel - moreinfo.gif {#97241129}
ACDELCO Part # 131131 moreinfo.gif {#97241130}

Posted on Jan 10, 2009


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