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engine temp

  1. rockcrusher07
    rockcrusher07
    hey every body, my name is brandon. i have a 2007 gmc sierra 2500HD with a 364. will a 180 degree thermostat make my engine run lean?
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  2. Roadmechanic9
    Roadmechanic9
    I dont know about lean but it wont get hot enough to take care of the emissions properly204 to 215 is normal operating temp and no more than 230
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