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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. Secondary Derale Transmission Cooler

    By Jacob Szymanski,   
    • 5 replies
    • 4.4k views

  2. 2021 3.0l duramax silverado def questions

    By Joenelson123,
    • 1 reply
    • 3.1k views

  3. 3.0 lm2 diesel oil - Redline

    By CODY HORNER,
    • 6 replies
    • 4.6k views

  4. 10l80 fluid and filter change procedure

    By Ronjon,   
    • 1 reply
    • 6.5k views

  5. Anyone have a flowmaster dual system? What’s it sound like?

    By s10dragracer888,
    • 0 replies
    • 892 views

  6. 3.0 Duramax Delete 1 2

    By chollister29,
    • 26 replies
    • 142.4k views

  7. 6L80 Any Changes from k2 to T1?

    By Whoops,
    • 4 replies
    • 2.1k views

  8. Changing gear ratios

    By 20silverado,
    • 4 replies
    • 4.7k views

  9. Ignition Coil bolt size

    By Daniel Formichelli,
    • 1 reply
    • 1.1k views

  10. 2020 GMC SIERRA TRANSMISSION FLUID

    By Nasser Aldhaheri,
    • 2 replies
    • 2.7k views

  11. 2019 Silverado 1500 LD Engine Oil Capacity

    By Faron77M,
    • 8 replies
    • 71.3k views

  12. Downsizing and newbie questions.

    By Itchytoe,
    • 4 replies
    • 1.2k views

  13. LM2 3.0 Automatic cool fill and Coolant air removal process

    By Bubba10417,
    • 2 replies
    • 3.1k views

  14. Wildly fluctuating engine tenperature 98 Sierra 1500

    By Tiribulus,
    • 4 replies
    • 712 views

  15. Kirkland Signature 0W-20 Full Synthetic Motor Oil 1 2

    By Mr.IMAPCMD,
    • 17 replies
    • 15k views

  16. 2020 Chevy 3500 dually locked up while pulling

    By Steve Macedo,
    • 4 replies
    • 2k views

  17. Buying oil 1 2

    By DHBWA,
    • 20 replies
    • 3.5k views

  18. 6.2l OEM cat back performance exhaust.

    By Jus Cruisin,
    • 6 replies
    • 6.8k views

  19. Corsa Sport or Borla S-type

    By jwilso98,
    • 10 replies
    • 9.2k views

  20. Excessive DEF usage towing - 2023 LZ0

    By Sobo21,
    • 2 replies
    • 2.8k views

  21. How does your 2.7 sound?

    By teeje9876,
    • 2 replies
    • 2.1k views

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

    By jaxcam02,
    • 17 replies
    • 21.2k views

  23. Borla touring muffler part number

    By Sperro,
    • 4 replies
    • 2.8k views

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

    By Firehawk99,
    • 33 replies
    • 22k views

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

    By DemonWorks,   
    • 9 replies
    • 14.2k views
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