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  1. #1

    Default 2011 vs 2012 5.3L V8

    Current NON Chevy owner, looking at chevy
    I looked at the 5.3 L V8 the dealer has on the lot and the 2011 have a MPG listed as 13 C 18 H. On the same 2012 it is listed 15 C 21 H.. I have searched but was unsucessful . Can anyone tell me the differrence. what did Chevy do inorder to get the better MPH. Also anyone have any advise good or bad on this engine/ vehicle for me.
    thanks in advance

  2. #2

    Default

    Did you check to see if they had the same gear ratio?? the '12 could have 3.08's where the '11 might have 3.42's or even 3.73's. Just a guess.

    ________2013 4C Rated__________


  3. #3

    Default

    My 2011 silverado crewcab is getting 14mpg city... I could go for 16mpg or better!

  4. #4
    Sr. Mechanic
    Join Date
    Oct 2011
    Location
    Salt Lake City, UT
    Posts
    150

    Default

    Quote Originally Posted by RayD View Post
    My 2011 silverado crewcab is getting 14mpg city... I could go for 16mpg or better!
    There was recently an article in Car and Driver Magizine explaining how the EPA has changed their testing procedures. This is the reason for the difference.

    You could try to google that. The truck weighs 6,000 pounds - don't buy one if your concerned about the miles per gallon.
    Last edited by CKNSLS; 10-17-2011 at 05:49 PM.

  5. #5
    Jr. Mechanic Airborne Medic's Avatar
    Join Date
    Jun 2011
    Location
    Fort Hood, Texas, United States
    Posts
    111

    Default

    I am averaging a combined millage of 17.3 mpg on a tank of gas with the cheep stuff. Haven't tried the E85 yet.

    2011 Chevy Silverado LT 1500 Crew Cab Texas Edition. 5.3L
    - Convenience Package
    - 6K HID Kits Highs, Lows, Fogs
    - KN Air Filter
    - Custom Painted Bowties
    - Spray on Bed Liner




    "All right, they're on our left, they're on our right, they're in front of us, they're behind us...they can't get away this time.
    - Lieutenant General Lewis Burwell "Chesty" Puller USMC -

  6. #6

    Default

    The 5.3 is a strong durable motor which balances mpgs and HP. I have the flex fuel and run E85 most of the time. What do you plan to use the truck for, towing, off-road, racing or etc? The motor and setup you choose will vary depending on how you use it. They have a max towing option with the 6.2l, hitch and different shocks in the rear.
    2009 GMC Sierra 5.3L running on E85
    Black and chrome
    Volant CAI
    Borla dual exhaust
    Chrome Billet grill
    Tonneau cover
    4300k High/Low Beam HIDs
    Westin Ultimate Bull Bar with PIAA 540s
    Blacked-out tail and third brake light

  7. #7

    Default

    my main use for the truck is going to be daily driver. I dont tow much at all, but need the four doors(back seat) for kids and i hate not to have a bed .. so i am hestiant on a suv... i just like a p/u

  8. #8

    Default

    I have the crew cab and when we go on road trips we're very comfortable, even when we bring our chocolate lab. Flip up the bench seat and he's all set. My wife has said that the ride is very comfortable. The 5.3l will give you the power you need to haul and gets good fuel efficiency. As was mentioned earlier, if you're concerned about mpgs, you may want to look elsewhere, but for a 5,500 lb vehicle, these do get pretty good mpgs. If you get the flex fuel motor, you can use gas or E85. You lose some mpgs with ethanol, but get a little more power with it, and it's made in America. I find it works out for me as long as the price is at least 10% less than gas.

    Good luck and let us know what you decide.
    2009 GMC Sierra 5.3L running on E85
    Black and chrome
    Volant CAI
    Borla dual exhaust
    Chrome Billet grill
    Tonneau cover
    4300k High/Low Beam HIDs
    Westin Ultimate Bull Bar with PIAA 540s
    Blacked-out tail and third brake light

  9. #9
    Legend

    Join Date
    Jun 2006
    Location
    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.
    Posts
    1,612

    Default

    EPA site shows the 2011 5.3 6 speed 15-21 the 2012 is the same with some EFI being 15/22
    Even shows the K 4X4 with 15/21 I think- that is a surprise 4x4 same as 2wd

    Could the 13/18 have been the bigger motor?
    1998 suburban-
    1/2 ton

    199500 miles
    River
    Ridge,LA

  10. #10

    Default

    I would have to agree with the previous posts that the difference in MPG could be the result of different options on the vehicle. I am showing that these are similar for the two models years for vehicles with the same options. If you have further questions please feel free to contact me directly. Thank you.

    Tricia, GM Customer Service.

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