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Thread: 4.8 motor

  1. #1

    Default 4.8 motor

    i am looking at a 2007 GMC 4 door P/U with the 4.8 motor and 4 speed auto. any opinions on the 4.8? good or bad. thanks

  2. #2


    The 4.8 is strong motor, its been around for quite a few years and has proven reliability. Will you be needing the truck for anything other than daily driving?

    2009 Silverado 1500
    5.3L / 3.73 G80 / 4spd / 4x4 / LWB/ Ext Cab / HD Tow-Haul
    2.25in ReadyLift Level Kit / 3in blocks/ 3500lb HellWig / 265x65x17 Wrangler AT
    K&N Filter / AirRaid MIT / MagnaFlow 2.25" Dual Exhaust / HyperTech MaxEnergy

  3. #3


    Welcome to the club. The 4.8 is like the other LS type truck engines if taken care of it will last almost forever. It has fewer problems per 100 engines than Ford and Toyota. If your not going to tow anything heavy than go for it.

    2005 Chevy Silverado Z71 Crew Cab
    6" Skyjacker lift w/Edlebrock dual front remote resoviour shocks, single rear remote. Rancho skid-plate.
    17" x 9" M/T Classic Lock Wheels, 35" BFG A/T or M/T tires
    4.10 PercisionGears w/factory locker, T/A Performance rear-end cover
    Banks CAI intake, ported throttlebody, JBA coated headers, over-sized Magnaflow cats, Magnaflow cat back exhaust, Diablo tuned
    B&M aluminum deep transmission pan
    Warn brush guard w/Warn 9.5 XP winch, PIAA bulbs, Line-X bedliner, AWS Black tool chest, Extang tonneau cover
    Weather Tech floor mats
    Cover-Craft seat covers
    Dash mat cover
    Formula One window tint
    One black Lab in rear seat.

  4. #4


    no, just our daily driver which is about 4000 miles per year.

  5. #5
    murdog94's Avatar
    Join Date
    Feb 2008
    Cloquet, Minnesota, United States
    Blog Entries


    Then the 4.8L will suit your needs. The 4.8L doesnt have a ton less power than the 5.3L but there is a pretty big difference in how it feels. BUt if it is mainly a driver with trips to home depot then it will be great for you!


    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


    my 4.8 has been great for me, Havnt had an issue with it, and its a daily driver, and I've had to pull a few fords that died here and there
    Go-Recon "xtreme" amber scanning tail gate light strip, Cobra ultra2 CB radio W/ 4 foot firestix antennas, dual exhaust with 40 series single in dual out muffler, 305/65R17 Mickey Thomson Baja ATZ on 17 inch Mickey Thompson Side Biters, 3 inch body lift

    "when the going gets tough the tough get cyclic:fighting0019:"
    "use the force luke:fighting0040:"

  7. #7
    Sr. Apprentice jdchet's Avatar
    Join Date
    Oct 2007
    Lake Peekskill, New York, United States


    I have had 2 Chevy pickups with the 4.8 engine and have had no problems with either one. My only gripe with them concerns my 2007 4X4 Silverado LT1 Extended Cab. Truck has the 3.42 rear axle ratio with stock 17" tires. The 4.8 is a little weak at low RPM's. The 4.8 needs to rev a bit to make some decent torque to haul a 5,000 lb. pickup up hills and such. If you live in a relatively flat area and don't haul any big loads regularly this will be of little concern. If you've got lots of hills to deal with the tranny will be downshifting quite a bit to maintain speed on the highway. I feel many of the shortcomings I've just described are the fault of the 3.42 rear. At 65-70 mph the engine is turning right around 2000 rpm's and there is not enough torque at that point to keep it from downshifting. This was of little concern in the 2002 2wd reg. cab long bed Silverado I had before this due to lighter weight, 3.73 rear and 16" tires. It also towed up to 3,000 lbs. quite good too! Fuel mileage on the 2007 is about 12 around town and 17-19 on a trip. The 2002 got about 15 around town and 19-21 on a trip. All in all an engine that will do the job with no problem!

    [B][I][SIZE="2"]2007 Silverado LT 4wd ext cab 6.6' box,4.8l V8.
    2007 Equinox AWD SUV

  8. #8

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


    The 4.8 is a good reliable motor
    The only problem- is the 5.3 IS SOOOO ALAROUND GOOD
    Make sure you get a good price on it-it should sell for $1000 or more less than a similar 5.3-folks love the 5.3-they like the 4.8

    Price is right-go for it.
    1998 suburban-
    1/2 ton

    199500 miles

  9. #9


    Sorry I cant add to the comments on the 4.8 but would like to say, Welcome to the club!!!

  10. #10


    Ive got the 4.8l in my 2003 Silverado 1500...i love the motor and its pull everything that i need too,even my 5,500 pound camper.Ive got the RC leveling kit and 285 tires,and it still pulls pretty good but my rear sags quite a bit after the leveling kit,but thats why im getting air bags for the rear!...damn good motor!

    2009 Chevrolet Silverado 1500 LT Z71 Crew Cab "All-Star Edition"

    Line-X'd Bed
    Line-X'd Custom Brush Guard(Heavy Duty)
    5.3L Flex Fuel
    275/65R18 Toyo Open Country AT2's
    2" Rough Country Leveling Kit(want to get the 2.5 RC kit)
    EGR In-Channel Vent Visors
    Exterior PLUS Package
    Interior PLUS Package
    K&N Drop-In Air Filter
    Cat-Back Dual Exhaust
    Black Bowties
    Diablo Sport Predator(AFM Disabled)
    Towing Mirrors
    Next Planned Mods
    Blacked out Tail Lights
    Aftermarket Rims

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