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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. VVT issue

    By TravisLaut,
    • 4 replies
    • 443 views

  2. 2018 Silverado 2500 duramax electrical problems

    By Levi Sullivan,
    • 5 replies
    • 7.1k views

  3. 2019 2500HD trans issue ( wheels spinning while trying to stop!)

    By 2019 Red,
    • 0 replies
    • 1.3k views

  4. 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
    • 1.3k views

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

    By Reggie Belanger,   
    • 0 replies
    • 1k views

  6. Shifting issues

    By jacob keese,
    • 0 replies
    • 1.8k views

  7. L5P back to shop

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

  8. Manual shifting not working

    By Ryan Fischer,
    • 0 replies
    • 2k views

  9. wont start without ether please help

    By TRAVOSE20,
    • 0 replies
    • 1.9k views

  10. MAP Sensor cage.

    By BNSF,
    • 1 reply
    • 3.3k views

  11. coils and wires

    By dynoray,
    • 0 replies
    • 2.4k views

  12. Fuel gauge sticking.

    By Mike Hamm,
    • 0 replies
    • 2.6k views

  13. 2015 GMC Sierra 3500HD SRW rear caliper torque spec

    By Matt Ziprick,
    • 4 replies
    • 12.7k views

  14. Buyer beware, CNG

    By CNGTruck,
    • 4 replies
    • 3.4k views

  15. Worth buying high mileage trucks?

    By Katkinson1112,
    • 13 replies
    • 23.9k views

  16. Glow plug that is haunted lol

    By topdj,
    • 0 replies
    • 3k views

  17. start engine to view application

    By LabOne,
    • 0 replies
    • 2.7k views

  18. Service theft deterrent system

    By Trevo-all,
    • 0 replies
    • 5k views

  19. The great debate…. L5P oil

    By MichDirtyMax19,
    • 6 replies
    • 10.3k views

  20. 2018 GMC Sierra Duramax 6.6

    By rvillaverde,
    • 0 replies
    • 8.1k views

  21. Shell Rotella T6 15-40

    By gmacecsko,
    • 2 replies
    • 3.9k views

  22. Crank but no start

    By Btreadway2003,
    • 0 replies
    • 3.5k views

  23. Code P2297 oxygen sensor (O2) has out of range sensor performance when the vehicle is decelerating for bank 1 sensor 1

    By Robert Hahn,
    • 0 replies
    • 7.3k views

  24. No power to driver side lowbeam

    By Scott77,
    • 0 replies
    • 1.4k views

  25. No power to driver side lowbeam

    By Scott77,
    • 1 reply
    • 1.7k views

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