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  1. #1

    Default I need help choosing an engine size...4.8 or 5.3

    I am looking at buying a 2003-2007 Chevy Silverado 1500 extended cab and im unsure which enigne would best suit my needs. Basically its going to remain a near stock truck with little to no lift, no big tires just a get me from point a to point b vehicle. Maybe a few appearance mods but thats it. I wont be doing any heavy hauling it would all be light loads and it wouldnt be hauling very often. Yet i would also like to get a decent number for gas mileage. im not sure if the extra liters in the 5.3 would affect gas mileage all that much or not but i do know there will be a little more performace from it which im not looking for perfomance as i am more of a conservative driver. please give me any input you may have. Thank you!

  2. #2
    Legend
    murdog94's Avatar
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    Default

    Go with the 5.3L there isnt really any difference in milage, and the 5.3L has more power, will haul more etc. And as mentioned there isnt a noticable milage difference and in some cases the 5.3L gets better milage.
    Both will more than meet your needs however, and honestly just find one that you like with the options that you want and either motor will more than suit your needs, and last for a VERY VERY long time with proper maintenance.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  3. #3

    Default

    i agree with Murdog, i have the 4.8 but i bought the truck used and the mileage and price was right. the mpg are nearly identical, so why not get the extra power.
    2008 TAHOE LT, volant powercore, superchips programmer

  4. #4
    Legend

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    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.
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    Default

    5.3 5.3 5.3 Like Murdog and JBJ said 5.3.
    No one who bought the 5.3 wishes he had bought the 4.8- NO ONE.
    However most folks who bought the 4.8 wish they had the 5.3! Heck all of them wish they had the 5.3(if they are being honest).
    The 4.8 has one small advantage over the 5.3- CHEAPER TO BUY A NEW TRUCK WITH THE 4.8!!
    That- cheaper to buy when new- IS THE ONLY REASON TO BUY A NEW TRUCK WITH A 4.8!!Cheapskates(I'm usually one) buy the 4.8.
    On the other hand the 5.3 is better in every other way you can measure.
    In fact the 5.3 with the cylinder shutdown feature(maybe added in 2006 or so??) gets better mpg than the 4.8.

    Buy the 5.3 !!
    Now there is nothing wrong with the 4.8, but the 5.3 gives MORE of everything for the same MPG- easy choice.
    1998 suburban-
    1/2 ton

    199500 miles
    River
    Ridge,LA

  5. #5
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    murdog94's Avatar
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    The active fuel management (AFM) which shuts down 4cyls. was in either 07 or 08 (pretty sure on the 07 NNBS trucks GMT900) the 1999-2007 (classic) have just a good old american 300HP V-8.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  6. #6

    Default

    5.3l ftw!!!

    ________2013 4C Rated__________


  7. #7
    Sr. Engineer
    TomsHHR's Avatar
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    My 5.3 has the AFM and is rated at 327 HP from the factory. On a trip over New Years at -12F I averaged 22 MPG at 75 Mph. I added a Trifecta Tune to make the AFM more aggressive. Even if I am a dealer!! sssSSShhhhhh!!
    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.

  8. #8

    Default

    [QUOTE=I added a Trifecta Tune to make the AFM more aggressive.[/QUOTE]

    What's this you speak of??

    ________2013 4C Rated__________


  9. #9
    Sr. Engineer IPFK83's Avatar
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    Jacksonville, North Carolina, United States
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    Default

    Go with the 5.3!

    ======​SOLD=====
    2006 1500 4x4 extended cab short bed
    SAS 12" suspension lift
    38x15.50 Mickey Thompson ATZ
    20x10 Mickey Thompson Classic II
    FOA custom shocks
    Dana 44HD front axle
    14 Bolt SF w/ detroit locker
    yukon 5.13 gears
    Dynatech Long tube headers
    Dynatech y pipe w/ high flow cats
    Magnaflow muffler
    Tom woods custom dual cv rear driveshaft
    K&N AIRAID system
    Hypertech power programmer
    And much more...........

  10. #10

    Default

    5.3 for sure. more common means cheaper parts. my brother had a 4.8 in a truck his work gave him and he hated it. my sierra has a 5.3, and the silverado I had before this had one as well, there good strong reliable engines that get the same mileage ( if not better 4.8 is smaller so it has to work harder to do the same things )

    Alex


    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

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