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  1. R

    2011 Yukon XL 2500

    Thansk JennaBear, I have the 6.0L, same used in the HD series of trucks. The 2500 series always runs on 8 cylinders. I didn't buy the Yukon to get great fuel economy and for the size and weight of it, I shouldn't be dissapointed, but a little more is always better. What other vehicle...
  2. R

    2011 Yukon XL 2500

    Thanks, Intake is first on my list. Took a trip from Phoenix to Wyoming and towed a small 1500 to 1800lb trailer back and I couldn't belive how much the tranny shifted. I didn't mind so much in the tall mountains, but I was a little suprised by the smaller mountains.
  3. R

    2011 Yukon XL 2500

    Looking into a tune for my 2011 Yukon Xl 2500. It is generally a daily driver, but I have 8500lb trailer that I tow about once or twice a month. I know the 2500's are somewhat rare, but do you do these tunes? Will your tune help with MPG? Will it help to smooth out the 6l90e tranny...
  4. R

    Need more power

    Thanks buy I was asking specifically for the 6.0l. Web search doesn't pull up too much for the 6.0, so I was wondering who has modded a late model.
  5. R

    Need more power

    So I bought a 2011 Yukon XL 2500 in July, and while I love my XL, I want a little more power, and hopefully if my foot isn't all the way into it, a little more fuel economy. So I have the 6.0l, just wondering what I should do first. Tune, CAI/Spacer, or exhaust?

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