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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. 

1,039 topics in this forum

  1. Flapper Question

    By hihosilverado,
    • 9 replies
    • 2.6k views

  3. 2019 Silverado 10sp fluid exchange

    By Black02Silverado,
    • 12 replies
    • 2k views

  4. Diablo 7222 - R 1 2

    By lpg,
    • 21 replies
    • 4.8k views

  5. Exhaust Rattle on 2021 6.2l CC 1 2

    By burgie189,
    • 17 replies
    • 17.7k views

  6. Lifter/pushrod failure questions? 1 2 3 4 5

    By Adamace1,
    • 63 replies
    • 11.7k views

  7. 6.2/6L80/3.73 vs 6.2/8L90 vs ??? 1 2

    By tdc5152,
    • 26 replies
    • 4.3k views

  8. 2020 Chevy 1500 Durmax DEF in fuel

    By Nick Crawley,
    • 5 replies
    • 1.6k views

  9. X pipe ain’t it

    By Avery Dameron,
    • 7 replies
    • 1.4k views

  10. How do you guys estimate Fuel Mileage? 1 2 3

    By Calboy,
    • 33 replies
    • 2.1k views

  11. 2021 5.3 GMC Sierra lifter failure

    By Paul Ternes,
    • 11 replies
    • 5.4k views

  12. Erratic def consumption

    By Yxan,
    • 4 replies
    • 4.8k views

  13. New York’s new exhaust law 1 2

    By Dh669,
    • 29 replies
    • 3.5k views

  14. She loud 1 2 3 4 5

    By Avery Dameron,
    • 63 replies
    • 5.7k views

  15. Stock Wheels for Winter?

    By yzinger,
    • 7 replies
    • 898 views

  16. Chirp

    By Jevard Hoskins,
    • 3 replies
    • 1.7k views

  17. 21 tb 6.2 exhaust ideas? 1 2

    By Lpfm1990,
    • 21 replies
    • 4.4k views

  18. Anyone else had issues with faulty motor mounts causing a shake/vibration at idle

    By Rcfire,
    • 5 replies
    • 10.6k views

  19. Dual Exhaust Picture Request

    By ls5454ss,
    • 1 reply
    • 908 views

  20. dexosD?

    By fireaxxe,
    • 10 replies
    • 5.7k views

  21. Lifter Failure club

    By davew8572,
    • 2 replies
    • 996 views

  22. 2019 silverado high country, early morning transmission jerky

    By 2019 silverado high countr,
    • 9 replies
    • 5.8k views

  23. 2020 3.0 Duramax 1st Blackstone Report 1 2 3 4

    By Time2gofishing1980,
    • 57 replies
    • 9.1k views

  24. Looking for pictures of 3/5 drops and 4/6 drops.

    By DaveyD6364,
    • 1 reply
    • 884 views

  25. Low speed clunking. Say 20mph stop and go traffic.

    By Moledigger2019,
    • 5 replies
    • 1.9k views

  26. Oil change 1 2

    By Avery Dameron,
    • 23 replies
    • 3.2k views

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