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2019-2025 Silverado & Sierra Engine & Transmission (L3B/L82/L84/L87/LM2/LZ0)

Technical Discussion, help, and advice for the Chevy Silverado and GMC Sierra small block engines,6/8/10 speed transmissions, along with factory and performance exhausts.
 L3B 2.7L Turbo, L82/L84 5.3L & L87 6.2L, and LZ0/LM2 3.0L Duramax Diesel Engines. 

962 topics in this forum

  1. 2020 Silverado metal shavings and ball bearings in transmission pan

    By TJK1972,
    • 6 replies
    • 1.2k views

  3. Which brake pads ceramic or semi metallic

    By Chevyguy273,
    • 4 replies
    • 1.3k views

  4. Flapper valve, useful or not in dealing with drone 1 2

    By TrueBlue,
    • 28 replies
    • 2.5k views

  5. What Engine You Chose and why VOTE 1 2 3 4 8

    By Big_Kahuna,
    • 105 replies
    • 22.5k views

  6. 2020 RST 6.2 Headers

    By Butch Peyton,
    • 0 replies
    • 586 views

  7. Transmission pan water leak?

    By 20silverado20,
    • 9 replies
    • 4.1k views

  8. Transmission Locked Tonight

    By dtholmanmax,
    • 4 replies
    • 1.5k views

  9. Rear Drive Shaft

    By Butch Peyton,
    • 2 replies
    • 587 views

  10. Gm Dexos D oil part number has changed (which one do you use in your 3.0 Duramax)?

    By Robert Hein,
    • 2 replies
    • 1.3k views

  11. Will a L86 fit in a 2020 GMC Sierra with a L87

    By Kevin999,
    • 4 replies
    • 2k views

  12. Pinging/detonation ??

    By Deadstockpomp,
    • 2 replies
    • 1k views

  13. Transmission temperature 10speed with 3.0 LZO Duramax 1 2 3

    By steve king,
    • 35 replies
    • 14.6k views

  14. 3.0 Diesel exhaust tips

    By erogers10287,
    • 2 replies
    • 836 views

  15. Vibrations in the seat at 38+ mph

    By Stiffler,
    • 5 replies
    • 834 views

  16. GM Accessory Dual exit tip

    By Michael Stark,
    • 8 replies
    • 1.3k views

  17. Trail Boss Axle Part #

    By PRK,
    • 1 reply
    • 503 views

  18. 2023 Sierra single side exit to dual rear exit exhaust question

    By ddc1279,
    • 1 reply
    • 659 views

  19. 21 Elevation 5.3 slight tick at idle

    By Nicolas Passafiume,
    • 4 replies
    • 1.9k views

  20. Duramax Fuel Filter Housing Stuck

    By Buddee,
    • 4 replies
    • 1.8k views

  21. Most reliable platform/engine/transmission combination

    By Kableguy,
    • 10 replies
    • 3k views

  22. 2019 Sierra AT4 5.3 10 speed "chuggle"

    By Dave78,
    • 4 replies
    • 808 views

  23. Lifter Failure on New 2022 Sierra 1500 AT4 Limited 6.2 1 2 3 4

    By PacksAWallop,   
    • 45 replies
    • 23k views

  24. L8T Swap - 2019 T1 Sierra w/ L84 + 8 speed

    By MacPH,
    • 0 replies
    • 985 views

  25. 2021 GMC Sierra Denali 1500 Exhaust Sound Question

    By l337neteng,
    • 4 replies
    • 836 views

  26. 2023 3.0 Duramax siren noise from dash.

    By Greg Clark,
    • 5 replies
    • 1.3k views


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