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    Misfire help

    I have a 2019 Yukon XL SLT with 5.3L and 4x4 and 115,000 miles. I had noticed on a trip to Colorado that there was some sluggishness or "mild kicking" when accelerating in the 1000-1500 rpm range. Especially in higher gears. No codes though. On our ride home, it was worse and finally threw a...
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