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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. How does your 2.7 sound?

    By teeje9876,
    • 2 replies
    • 1.7k views

  3. 22 5.3 Muffler Delete (surprisingly enjoyable) 1 2

    By jaxcam02,
    • 17 replies
    • 12.2k views

  4. Borla touring muffler part number

    By Sperro,
    • 4 replies
    • 2.3k views

  5. Afe muffler replacement 5.3 10 speed trail boss lt 1 2 3

    By Firehawk99,
    • 33 replies
    • 17.5k views

  6. PPE Exhaust installed on 3.0 LM2 Duramax Diesel Silverado !

    By DemonWorks,   
    • 9 replies
    • 9k views

  7. Humming/Whining Sound on 6.2L 1 2

    By Anthony Bessel,
    • 15 replies
    • 9.7k views

  8. Park Park comes on while driving

    By GregGreg123,
    • 2 replies
    • 866 views

  9. Duramax LM2 3.0l Independent Exhaust Brake Actuation

    By jdrockin,
    • 5 replies
    • 7.9k views

  10. Magnaflow 19534 - anyone try this set-up yet? 1 2

    By RCF71,
    • 18 replies
    • 8.3k views

  11. Flowmaster American Thunder

    By Grey6.2,
    • 1 reply
    • 1.4k views

  12. Exhaust tip placement

    By bikersully,
    • 1 reply
    • 1.7k views

  13. L84 can I save it ?

    By Fredo1888,   
    • 8 replies
    • 4.1k views

  14. Rear Diff Cover Bolts Torque Spec

    By fondupot,
    • 4 replies
    • 9k views

  15. Rattle and Jerk

    By 20LTZ,
    • 2 replies
    • 1.2k views

  16. Borla Catback system ordered from factory

    By Stanley Morton,
    • 3 replies
    • 1.2k views

  17. 2023 GMC 1500 Sierra Denali 6.2l and DFM

    By Jus Cruisin,
    • 5 replies
    • 6.2k views

  18. Upgrade opinion 1 2

    By bowtechjoe,
    • 25 replies
    • 3.4k views

  19. 2017 Sierra Adaptive Valve Delete

    By benelli,
    • 0 replies
    • 661 views

  20. 2017 Adaptive Valve Delete

    By benelli,
    • 0 replies
    • 944 views

  21. 0W-20 Diesel Oil Options

    By Ronjon,   
    • 7 replies
    • 9.3k views

  22. Borla ATAK Muffler vs full Cat-Back System 1 2 3

    By Gunndy Gaming,
    • 30 replies
    • 10.8k views

  23. 3.0 long term

    By TeamSaris,
    • 5 replies
    • 2.6k views

  24. 2020 1500 6.2l whining noise

    By Willsanto,
    • 3 replies
    • 950 views

  25. Regearing Trailboss 1 2

    By Blake Stiff,
    • 17 replies
    • 8.8k views

  26. Off-Roading with the Single Speed Transfer Case: 4.3L and 2.7L 1 2

    By Justin Holland,
    • 29 replies
    • 16.2k views


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