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  1. #1
    Jr. Engineer
    Join Date
    Dec 2008
    south florida

    Default enough power from your 4.8L ?

    guys, i went looking at used trucks yesterday and found a 2011 extra cab silverado with a 4.8L v-8... i looked the specs up and it says 302hp.... seem like enough for me, since i only pull a little 14' aluminum jon boat, but was curious how you guys like your 4.8L ?
    im sure its gotta have some pep to it, since i have been use to driving my 1990 k1500 with 5.7L which probably only has 180hp...
    just would like your thoughts on your 4.8L.....

  2. #2


    Gotta remember that 302 hp is not at 2000 rpms where your cruising.. its up around 4000-4500rpms.

    i put a 4.8 in a suzuki Samurai.. its got plenty power in that lil thing haha
    2000 ECSB Silverado 2WD
    LQ4 with Isky 215 Turbo Cam
    4L80E KB Racing S475 Turbo Kit

  3. #3


    I have a 2001 4.8L extended cab that only puts out 270HP. I don't tow so I can't really comment on that but it does have some get up and go when you put the pedal into it.
    Clint (TX) 2001 Silverado LS 4.8L auto 2wd ECSB [GARAGE]
    Gasoline or gunpowder: If you ain't burning one, you ain't having fun!
    NRA Endowment Member 5 24 48 88 - Hendrick Motorsports FTW!

  4. #4
    Jr. Mechanic
    Join Date
    Jan 2011
    Markham, Ontario Canada


    I have a 2010 crew cab with the 4.8 and 4 speed and 3.23 rear-end 285HP I think. I pulled my 2500lb trailer about 300 miles last fall and didn't even feel it behind me I also had about 1200lb in tne truck. The gas mileage dropped a little but that was due to the 3.23 rear gears. Another 300 mile trip with my boat and motor (2000 lbs and 2000 in the truck) it was OK but i kept below 70 mph. If i had to replace it I would get the 3.73 gears (extra 2000 lb towing capacity). My truck has the towing package but no brake controller.

  5. #5


    It also helps to drop a gear and turn some RPMs instead of letting it shift 4-3 and back 3-4 alot. That creates alot of unwanted heat in the trans.

    goin 3.23 to 3.73 is really close to just pulling in 3rd gear with 3.23s.

  6. #6
    Jr. Engineer
    Join Date
    Dec 2008
    south florida


    thanks for the input guys... im still searching for a new or newer truck, but since i finally got my 1990 truck running good again, im putting it off for now.
    its good to know the 4.8l is sufficient.

  7. #7


    in my opinion, the 4.8 will do ya, but for the money and what you will be doing, the 5.3 is better, more power, and the mileage will be just as good, it will also help resale if you ever do sell it.


    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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