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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. Muffler and flapper delete 2019 5.3 DFM 1 2 3

    By Jschnepf,
    • 30 replies
    • 43.4k views

  2. Rear differential pinion seal leak?

    By lapoolboy,
    • 5 replies
    • 27.4k views

  3. Looking for stock muffler

    By Jwal23,
    • 3 replies
    • 977 views

  4. 6.2L fuel required

    By James0912,
    • 11 replies
    • 7.4k views

  5. Is it possible?......

    By thedemondennnis,
    • 3 replies
    • 1.1k views

  6. noise in rear

    By Tracy Lawrence,
    • 1 reply
    • 675 views

  7. 2020 3.0L Sierra Duramax Vibration/Balance Problem

    By Jaketab,
    • 10 replies
    • 8k views

  8. Stock exhaust back pressure normal or no

    By Dersch,
    • 1 reply
    • 1.3k views

  9. Which magnetic drain plug?

    By garyo,
    • 4 replies
    • 4.8k views

  10. 2021 Silverado 3.0L Duramax Owners Manual?

    By Claxy515,
    • 14 replies
    • 11.4k views

  11. 8 Spd Harsh Shift Question

    By Matt G,
    • 7 replies
    • 1.6k views

  12. New 21 Silverado with 5.3 and NO DFM

    By Spanky06,
    • 9 replies
    • 6.2k views

  13. 2019 Chevy Silverado Trail Boss Transmission Issues

    By Robert J,
    • 1 reply
    • 3.8k views

  14. Sierra 5.3L AT4… 6spd versus 8spd, which one?

    By Jchaffin20,
    • 6 replies
    • 1.5k views

  15. Rear Resonators on ‘20 6.2L

    By mikystyle,
    • 0 replies
    • 917 views

  16. Delivery on truck parts

    By Dlarimer57,
    • 5 replies
    • 921 views

  17. Looking for info on 10spd transmission flush

    By zhmorrow,
    • 1 reply
    • 1.3k views

  18. Aftermarket coolant temp sensor location?

    By kodiakdenali,
    • 3 replies
    • 6.3k views

  19. 2019 5.3L ECM Tuning 1 2 3 4 6

    By yankeedoodle86,
    • 81 replies
    • 52.5k views

  20. 2021 AT4 starting problems.

    By JMA 224,
    • 3 replies
    • 1.7k views

  21. 2021 Silverado High Country 4WD 5.3L Lifters

    By TLalli,   
    • 0 replies
    • 3.6k views

  22. Lost key, need help.

    By Joy123,
    • 3 replies
    • 17.8k views

  23. Any experience with a Hooker Aero Chamber muffler on a 5.3?

    By Ronnie Wasson,
    • 0 replies
    • 1.1k views

  24. Anyone using Amsoil on the 3.0L Duramax?

    By paxamus,
    • 14 replies
    • 13.1k views

  25. ANOTHER COld Air Intake Thread! 1 2 3 4 7

    By Ed/2020RST,
    • 96 replies
    • 48.9k views
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