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Engines & Powertrain (Duramax & Vortec)

Technical discussion for the 6.6L Duramax (LML / L5P) and the 6.0L Gas V8 (L96 / LC8). Covers the Allison 1000 and 6L90 transmissions.

227 topics in this forum

  1. 2018 Silverado 2500 duramax electrical problems

    By Levi Sullivan,
    • 5 replies
    • 7.6k views

  2. VVT issue

    By TravisLaut,
    • 4 replies
    • 709 views

  3. Worth buying high mileage trucks?

    By Katkinson1112,
    • 13 replies
    • 24.8k views

  4. 2019 2500HD trans issue ( wheels spinning while trying to stop!)

    By 2019 Red,
    • 0 replies
    • 1.3k views

  5. Trailer disconnected connected on dash 1 2

    By cmysstailights,
    • 15 replies
    • 27.9k views

  6. 2018 L5P codes. P129F & P228C

    By Danny R,
    • 11 replies
    • 42.8k views

  7. No power all the sudden .parked went inside came out and nothing no dash no crank nothing dead completely 9

    By Delaney Kerr,
    • 0 replies
    • 1.4k views

  8. two chimes vs one chime when I turn on ignition

    By Reggie Belanger,   
    • 0 replies
    • 1.1k views

  9. MAP Sensor cage.

    By BNSF,
    • 1 reply
    • 3.4k views

  10. Shifting issues

    By jacob keese,
    • 0 replies
    • 1.9k views

  11. L5P back to shop

    By Jackie Emery Andrus,   
    • 0 replies
    • 2.2k views

  12. Manual shifting not working

    By Ryan Fischer,
    • 0 replies
    • 2.1k views

  13. Turns over but won't start without ether

    By kbm0084,   
    • 9 replies
    • 19.9k views

  14. wont start without ether please help

    By TRAVOSE20,
    • 0 replies
    • 2k views

  15. coils and wires

    By dynoray,
    • 0 replies
    • 2.4k views

  16. 6.0 pulling timing at 3000 RPM 1 2

    By Abarth500.,   
    • 18 replies
    • 21.1k views

  17. Buyer beware, CNG

    By CNGTruck,
    • 4 replies
    • 3.6k views

  18. Fuel gauge sticking.

    By Mike Hamm,
    • 0 replies
    • 2.6k views

  19. 2015 GMC Sierra 3500HD SRW rear caliper torque spec

    By Matt Ziprick,
    • 4 replies
    • 13.4k views

  20. 2017 Duramax Recommends Using Only GM DEF to Avoid Problems 1 2

    By jimstringer,   
    • 22 replies
    • 78.6k views

  21. Glow plug that is haunted lol

    By topdj,
    • 0 replies
    • 3.1k views

  22. DEF heater failure and engine light 1 2

    By Jnich17,   
    • 28 replies
    • 89.2k views

  23. start engine to view application

    By LabOne,
    • 0 replies
    • 2.8k views

  24. '17 2500hd 6.0L Long Tube Headers? 1 2

    By Biggerdogg01,
    • 23 replies
    • 25.8k views

  25. Cam Swap 2015 6.0 1 2

    By JesseJames94,
    • 21 replies
    • 45.8k views

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