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  1. #1
    Sr. Apprentice Fan45acp's Avatar
    Join Date
    Aug 2009
    Marshall,Tx. USA

    Default Active Fuel Management with exhaust modifications

    I added a Gibson cat-back exhaust system to my 2009 Silverado.When the AFM switches back and forth from V8-V4 it makes a "Jake-Brake" type noise thru the exhaust.I want to find out is there any way to tune the Active Fuel Management out.Thanks......J.H.

  2. #2
    Sr. Engineer
    TomsHHR's Avatar
    Join Date
    Feb 2007
    Superior Wis
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    I did a Trifecta Performance Tune, The AFM was made more aggressive for more mileage. So yes it could be set for less aggressive.

    I am not sure if that can be done with some of the other tuners.
    2009 Chevy Sliverado Std cab 5.3, 4 speed Auto 2wd, Trifecta Tuned
    1926 Model T Bucket powered by Chevy LS 5.3 TH350 and S-10 rear axle Build period Sept 7, 2010 to April 2011
    1979 Starcraft Islander 221 Great Lakes Fishing Boat
    SOLD: 2006 Chevy HHR The Deer Slayer.

  3. #3


    I've got a Gibson SuperTruck system on my GMC, so I know exactly what you're talking about! JennaBear and Black Bear Tuning can fix you right up with what you want to do.
    The Cheap-*ss Modder & Thread Killer
    The Realist says, "The glass is too big".

    2013 GMC Sierra 1500 SLT Z60 4WD Crew Cab
    Mineral Green Metallic w/ Tan Leather Interior
    5.3 L FLEX w/AFM, 6A, Cheap-*ss Mods
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    Range V8 AFM Eliminator

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