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  1. #1

    Default '08 4.8l Head Specs

    I was wondering where I could find out the specs on the stock heads for the 4.8l engine. I've done alot of searching and come up with zilch. Thanks for the help.

  2. #2

    mfleetwood's Avatar
    Join Date
    Jul 2010
    Denver, CO
    Blog Entries


    Welcome to the club! Sorry, I do not have the answer but I am sure that someone will respond soon with one.

    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
    BFG All Terrain KO 315/70/17
    DRIVE TRAIN: 4.56 Gears; Detroit TrueTrac Differential; True Cool 40k Transmission Cooler
    PERFORMANCE: DiableSport Predator Tuner; Custom Tuned by Diablew; Magnaflow Exhaust; AFE Cold Air Intake
    ELECTRONICS: Kenwood DNX6180 Touchscreen; Subthump box w/10" Kicker; Driver Information Center (DIC); Rear View Camera
    ACCESSORIES: Westin Brush/Grill Gaurd; Westin Nerf Bars; Truxedo Tonneau; 20% Tint; Tow Mirrors w/Heat & Signals

  3. #3


    Welcome to the club, Pick up a book called How to Build high Performance Chevy LS1/LS6 V-8's by Will Handzel. At one time Handzel was in charge of GM Performance. You can get this book from a GM dealer part # 88958786.

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