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Engines & Drivetrain (V8, Duramax, TurboMax)

Technical discussion for the 6.2L (L87), 5.3L (L84), 3.0L Duramax (LZ0/LM2), and 2.7L TurboMax. Tuning, maintenance, and 8-speed &10-speed transmission tech.

1,140 topics in this forum

  1. Humming/Whining Sound on 6.2L 1 2

    By Anthony Bessel,
    • 15 replies
    • 17.9k views

  2. Park Park comes on while driving

    By GregGreg123,
    • 2 replies
    • 1.1k views

  3. Duramax LM2 3.0l Independent Exhaust Brake Actuation

    By jdrockin,
    • 5 replies
    • 12.6k views

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

    By RCF71,
    • 18 replies
    • 11.1k views

  5. Flowmaster American Thunder

    By Grey6.2,
    • 1 reply
    • 1.8k views

  6. Exhaust tip placement

    By bikersully,
    • 1 reply
    • 1.9k views

  7. L84 can I save it ?

    By Fredo1888,   
    • 8 replies
    • 6.6k views

  8. Rear Diff Cover Bolts Torque Spec

    By fondupot,
    • 4 replies
    • 21.5k views

  9. Rattle and Jerk

    By 20LTZ,
    • 2 replies
    • 3.3k views

  10. Borla Catback system ordered from factory

    By Stanley Morton,
    • 3 replies
    • 1.4k views

  11. 2023 GMC 1500 Sierra Denali 6.2l and DFM

    By Jus Cruisin,
    • 5 replies
    • 8.2k views

  12. Upgrade opinion 1 2

    By bowtechjoe,
    • 25 replies
    • 4.5k views

  13. 2017 Sierra Adaptive Valve Delete

    By benelli,
    • 0 replies
    • 871 views

  14. 2017 Adaptive Valve Delete

    By benelli,
    • 0 replies
    • 1.2k views

  15. 0W-20 Diesel Oil Options

    By Ronjon,   
    • 7 replies
    • 25.2k views

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

    By Gunndy Gaming,
    • 30 replies
    • 21.7k views

  17. 3.0 long term

    By TeamSaris,
    • 5 replies
    • 3.2k views

  18. 2020 1500 6.2l whining noise

    By Willsanto,
    • 3 replies
    • 1.3k views

  19. Regearing Trailboss 1 2

    By Blake Stiff,
    • 17 replies
    • 15k views

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

    By Justin Holland,
    • 29 replies
    • 19.8k views

  21. Fluid Verification for 2019 Sierra Denali

    By Thomas Rodriguez,
    • 1 reply
    • 1.2k views

  22. 2.7L 4Cyl in the 2020 Sierra 1500

    By Markus Warwick,
    • 3 replies
    • 3.1k views

  23. Any good extended warranties?

    By Mike Borowski,
    • 4 replies
    • 2.3k views

  24. Outside diameter of tailpipe on 2.7L Silverado

    By 64BAwagon,
    • 3 replies
    • 9.4k views

  25. 19 Silverado DFM DELETE HELP

    By Chris383cc,
    • 0 replies
    • 1.2k views
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