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  1. #1

    Default Active Fuel Management in 2009 Suburban

    Hello all. I am looking at getting a 2009 Suburban LTZ but I just noticed that the brochure I have for the 2009's seems to indicate that only the 2wd models had the 5.3L engine with Active Fuel Management. The 4x4's just had a regular 5.3L. Can anyone confirm or deny this for me? I'd prefer to get the 4x4 for when I need it, but want ot save gase when I don't need 4wd.


  2. #2


    the mileage difference between the 2 isnt all that ,uch, 1 mpg at the max. a good tuner and CAI with exhaust will pick up what you will loose with the 4X4


    2011 GMC Sierra SLE 5.3 Z71 4X4 Stealth Gray Metallic / 2004 Chevy Impala LS 3.8 Cappuccino

    Tow mirrors - Diablew Tuned - Flowmaster Regular 40 - Ready Lift 2.5' lift - BFG LT A/T K/Os - Carr Light Wing - TruckLite LED lights - Optima Red Top - 50% Front Window Tint - Line-X bedliner - Airaid MIT - Tekonsha P2 - ARS Billet Grill - Fia custom fit seat covers

  3. #3


    I would be happy to look into this for you as well. Are you considering the 1500 or 2500?

    Tricia, GM Customer Service.

  4. #4
    Jr. Mechanic Sandhopper's Avatar
    Join Date
    Feb 2010
    Amarillo, Texas, United States


    Not sure about 09 but our 10 4x4 has AFM... It does ok on really flat or slight down hill grades but I am not 100% sold on it. We get 20 mpg on highway trips. better than the 17 my silverado got but the burban has more power and torque and a 6 speed trans and a taller rear ratio...

    2010 Suburban Z71 5.3 A6, Sheer Silver, Ebony Interior

    2004 Lexus RX330 AWD - Netune Blue Metalic

  5. #5


    I am looking at the 1500. Thanks for your help!

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