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    idle surge/fluctuation 6.0L

    I have a new-to-me 2011 GMC Yukon XL 2500 6.0L w/ 23K miles on it. The car runs great and is idling around 500 RPM, but every minute or so it will surge (slightly lower then slightly higher +- 50-100 RPMS) to the point where you can feel it in the steering wheel and overall the car surges. It...
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    New member (looking for suggestions on upgrades for NNBS Yukon XL 2500 SLT)

    Hi, I am the proud owner of a new-to-me 2011 GMC Yukon XL 2500 SLT. I have spent some time on the forums here for the last couple weeks trying to get up to speed on everything NNBS related, but have not had much luck finding specific posts about 2500 models. Can anyone suggest upgrades that...
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    Stabilitrak trailer sway (introduced on 2012+ model)

    Hi, I am new to the thread and looking to purchase a 2500 GMC/Suburban. I found some nice 2011 models that have everything I want except the Stabilitrak trailer sway control option. From what I have read the hill start and trailer sway control were added as standard with stabilitrak on 2012+...

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