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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. 2021 6.2 AFM?

    By WeGone,
    • 9 replies
    • 29.5k views

  2. 3.0L duramax 0w20 vs 5w30 1 2

    By djsr2015,
    • 15 replies
    • 39.3k views

  3. Dump the engine oil at 500 miles?

    By Atlas,
    • 5 replies
    • 1.7k views

  4. 2020 Tahoe Help - Limp Mode

    By DOUG75,
    • 5 replies
    • 6.6k views

  5. Trailboss custom cluster upgrade?

    By bjr2020 6.2,
    • 2 replies
    • 1.3k views

  6. 2021 TB. Is manual or oil filter wrong? 1 2

    By 5of45,
    • 28 replies
    • 14.4k views

  7. $20 Exhaust Fix 2019 5.3 z71 1 2 3 4 14

    By ShamrockShooter,
    • 199 replies
    • 110.1k views

  8. Anybody go from 6.2 to 3.0 diesel? 1 2

    By truckguy82,
    • 16 replies
    • 29.9k views

  9. 5.3L RST: Looking For Mild-Sounding Exhaust

    By Dreww,
    • 3 replies
    • 4.2k views

  10. Help identifying which axle

    By Atlas,
    • 4 replies
    • 4.9k views

  11. 2.7T Oil Change

    By Grandpa1,
    • 3 replies
    • 23.5k views

  12. Maker of GM Performance Exhaust

    By Anacortes Army Guy,
    • 1 reply
    • 1.1k views

  13. Maintenance to early?!? Am I crazy?!?

    By TylerRST,
    • 6 replies
    • 2k views

  14. Amsoil 0W-20 and 5W-30 meets GM dexosD 1 2 3

    By The Pirate,
    • 37 replies
    • 39k views

  15. FlowFX vs Borla Touring 1 2

    By darks1d3,
    • 21 replies
    • 14.3k views

  16. Tow haul= no AFM/DFM?

    By RPaul,
    • 5 replies
    • 24.2k views

  17. Gear ratio of new truck. Please help a newbie!

    By Weshawk5,
    • 7 replies
    • 1.7k views

  18. Broke the tabs on PVC pipe

    By arkenzo,
    • 4 replies
    • 2k views

  19. New handheld programmers

    By 570590,
    • 9 replies
    • 2.7k views

  20. Magnaflow 19489 Catback on 6.2

    By Yfz43gmc,
    • 7 replies
    • 2.4k views

  21. Transmission fluid temperature

    By saenz Steve,
    • 2 replies
    • 1.4k views

  22. 2019 5.3 Engine Oil capacity

    By sams819,
    • 8 replies
    • 104.6k views

  23. Stainless Works true dual set up 1 2

    By Robby James,
    • 15 replies
    • 5.4k views

  24. 3.0L engine noise on acceleration 1 2

    By Mercracing,
    • 21 replies
    • 23.7k views

  25. 3.0 Duramax exhaust system leak test

    By ATfore,
    • 1 reply
    • 3.4k views
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