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  1. #1

    Default Recomended Upgrades for a 2008 GMC Yukon Denali XL


    New Here. I've read a lot about Cold Air Intakes and Upgraded exhausts, mixed reviews on both. I am considering the following:

    1. CAI
    2. Upgrade Chip/Program/Custom Tune

    Anyone here have a 2008 GMC XL that can shine some light on whether the upgrades were worth it.

    I will end up towing a 7,000 lb trailer sometime soon on occasion.


  2. #2


    I installed the vararam tri power on my fathers denali (6.2) and it made a huge power gain with a little tweaking from HPTuners.No dyno numbers but its he can keep me in sight a little longer now!
    Last edited by Cowl327; 09-16-2009 at 12:28 PM. Reason: misspelling
    2004 5.3 234/236-598/601-112 comp XER all internals,PS longtubes,true duals,no cats,3800 ArtCarr stall,Tuned by Vortec Performance(me)and a few other odds and ends.....

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