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Thread: Wanting new engine advice for 08 Silverado

  1. #1

    Wanting new engine advice for 08 Silverado

    I have a 2008 Silverado Z71 with a 5.3 in it. Truck has 300k+ miles on truck. Should I go back to the 5.3 or go to a 6.0? Or is there something else out there? Iím a medically retired Marine so I ainít got 10 grand to spend. I appreciate any suggestions.

  2. #2
    Join Date
    Aug 2014
    Thanks for your service Marine Raider1!

    If cost is an issue I'd rebuild the 5.3. That saves you a lot of headaches and a million little parts that end up nickel and dimeing you to death. Take the money you were going to put into the new engine with upgraded parts for your 5.3. Or, try and find an LY6 6.0. Same setup as your 5.3 but more displacement and way better heads. (It has the L92/LS3 heads...) The extra ponies are going to be rough on the old trans & rear end though... As soon as you upgrade the engine, lot's of things to consider. I'm not sure if the exhaust on your truck will bolt up to a LY6? Maybe, I just don't know.
    1992 K1500 Blazer.
    L94 & 6L80
    14 Bolt SF axle w/11" brakes & appropriate Combination brake valve, Eaton Trutrac rear posi.
    8000# hidden winch, Rocket Box, KYB Monomax shocks
    285/75R16 Duratracks
    Flat Panel Display Gauge cluster in progress.
    New interior & exterior paint planned.

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