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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 Silverado single exhaust to dual exhaust conversion 1 2

    By Steven Vona,
    • 29 replies
    • 24.1k views

  2. Gm customer

    By Shandy holder,
    • 2 replies
    • 1k views

  3. Transmission question

    By 15 Z71,
    • 13 replies
    • 2k views

  4. Heavy towing 1 2

    By Ronjon,
    • 23 replies
    • 3.9k views

  5. Bearing issues for the 6.2 1 2

    By ScathaTheWorm,
    • 26 replies
    • 23.6k views

  6. Trans Pan Drop and Refill or Fluid Flush? 1 2

    By BlancoSilverado,
    • 17 replies
    • 44.2k views

  7. Communication issues

    By edwadway,
    • 1 reply
    • 789 views

  8. GM's 6th Gen V8 ! What would you like to see? 1 2 3 4 5

    By Cojam1,
    • 69 replies
    • 23.5k views

  9. Dual vs single exhaust

    By Megalomegalodon,
    • 11 replies
    • 17.3k views

  10. Best engine for mountain/hill climbing 1 2

    By Z71RAD88,
    • 16 replies
    • 4.5k views

  11. 10speed Tranny, weird

    By oncewas,
    • 3 replies
    • 1.5k views

  12. 8 speed Transmission Pan

    By dfanzz01,
    • 5 replies
    • 1.8k views

  13. Rattling noise sounds like heat shield.

    By KShi,
    • 13 replies
    • 51k views

  14. 2022 6.2 engine failure. 1 2 3 4 6

    By Texas_Toast,
    • 75 replies
    • 106.4k views

  15. Lawsuit/NHTSA investigations L87 V8 engine

    By L Morgan,
    • 1 reply
    • 910 views

  16. 10L80 transmission lines leaking

    By Patrick Callery,
    • 3 replies
    • 1.3k views

  17. Which engine - 5.3, 6.2 or 3.0? 1 2 3 4

    By Z71RAD88,
    • 57 replies
    • 14k views

  18. Fuel tank size

    By Stig,   
    • 4 replies
    • 1.9k views

  19. Exhaust Flapper , mod? 1 2

    By DaveHC,
    • 27 replies
    • 25.4k views

  20. Loss of power while driving “Shift To Neutral & Press Start”

    By tcafranz,   
    • 9 replies
    • 5.6k views

  21. Elka 2.0 vs Fox 2.0

    By Russ757,
    • 0 replies
    • 663 views

  22. OTA “Recall” N242452130 – what is it really?

    By Probity,
    • 1 reply
    • 3.7k views

  23. How to diagnose lifter failure before it really goes south? 1 2 3 4

    By DK91105,
    • 50 replies
    • 13.7k views

  24. Sierra 3.0L Duramax Software Update Problem

    By cwhite158,
    • 14 replies
    • 12.8k views

  25. Engine heating up to 235-245F

    By David russ,
    • 6 replies
    • 2k views
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