GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 4 of 4
  1. #1

    Default Newbie with 2010 Silverado V8 flex fuel

    Have a couple questions, looking to increase HP and gas mileage . I've heard and read many different things about the flex fuel model, hoping you guys can help me out!! Thinking exhaust, maybe intake and chip, what brands do you recommend, and what's worth the upgrade. Thanks in advance

  2. #2

    Enkeiavalanche's Avatar
    Join Date
    Apr 2010
    Piermont,NY, back in Northern NJ now, But may be in IL soon....


    First off Congrats on the new truck... First off The flex E-85 Will eat up your MPG's. it will go down by about 30-40%. So unless E-85 is $.40 or better lower then Reg by you don't bother. As for add on's it all depends on your foot. Exhust,CAI and Programer all work together. But you are also looking at about $700-$1200 for all 3. Most of the 5.3 newer Chevy trucks will avg between 14-18 AVG MPG's.

    As for me... I drive my Avalanche like a Vette But I also have upgraded the brakes,Sway bars, And the above. With my 20's on for summer I avg 14.6 I have my stocks on now for the winter and I am up to 14.8 now and it is still going up. My programer is set to 87 Performance. Read my sig below and you will see what I have...

    Good Luck and keep us updated on what you get..
    08 Z71 Avalanche Mods to date: K&N CAI,Hellwig Swaybars and End Links, Corsa Sport Exhaust, Superchips Programer,IPCW LOF & 3rd brake light and tails, AMI Gas door,Show Hooks and Door locks, Enkei Wheels, with Pirelli tires, StreetScene Bowties, Grant Steering wheel,Muth signal mirrors,SSBC Big Brake kit,Huskyliner Mug gards,Floor mats and Hood shield, McGard Lug nuts and locks, Bedrug, Cervini's Ram Air hood,35watt HID Fog lights, Sylvania bulbs all around ZXE's Highs and Lows, WhiteNight Back up lights,Sirius and HD Radio, SnugTop sitting on deck now Got a Softopper on now,Tempress Boat Hatches.... New Bilstein shocks are on... New Mods coming soon..... X

  3. #3


    Thanks will do, just ordered wheels and tires, 20" black XD Monsters with Nitto Tera Grapplers! What is a CIA , and which is a good exhaust, thanks

    ---------- Post added at 01:32 PM ---------- Previous post was at 12:57 PM ----------

    Figured it out, cold air intake lol

  4. #4


    ...Regarding which is a good Exhaust, if you were to go to the Performance Section of the Forum, there you will find many Exhaust Threads, that may-be able to help with your question......

    BTW.....Welcome to the Site......


    5.3 l 3.73 l G80

Similar Threads

  1. SILVERADO WITH FLEX FUEL. vent valve light goes on , options
    By rf58 in forum Chevy Truck Talk & GM News
    Replies: 0
    Last: 06-25-2011, 06:30 PM
  2. 02 Yukon SLT 5.3L Flex Fuel, fuel line issue
    By TRyan9441 in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Replies: 2
    Last: 06-02-2011, 12:19 PM
  3. 2010 Silverado Flex Fuel Muffler Suggestions.....?????
    By dpelfrey in forum Performance & Fuel
    Replies: 4
    Last: 11-03-2010, 08:18 AM
  4. Performance chip - 2009 Chevy Silverado 5.3L Flex Fuel
    By Texashoopty in forum Performance & Fuel
    Replies: 4
    Last: 03-27-2010, 10:58 AM
  5. 2007 silverado and flex fuel eng.
    By urbancowboy in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 4
    Last: 01-18-2008, 03:04 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts