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  1. J

    P0300

    Ok, I am having an intermittent p0300,code on my 2012 Denali. You can feel and see on the tach a random,mis at idle and anything below around 1500 rpm. I recently installed a cai, long tube headers with catless y and had a black bear tune. I replace my plugs and wires when I did the headers. I...
  2. J

    2001 Yukon Vibration

    I have a question for the gurus on here. I just bought a 2001 Yukon XL 4wd. I put on a lift (torsion keys in front and 2 in spacers out back). I bought new wheels and tires and got an alignment. The alignment shop found worn hubs and one worn balljoint. I replaced all and everything felt...
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