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6.6L Duramax Diesel & Allison Powertrain (L5P/MGM)

Technical powertrain discussion specifically for the 2020+ L5P Duramax Diesel Engine and 10-Speed Allison Transmission combination on the 2020 Chevrolet Silverado 2500 / 3500 or 2020 GMC Sierra 2500 / 3500

6 topics in this forum

  1. 10 speed Allison Transmission 1 2

    By Double Dkar,
    • 20 replies
    • 945 views

  3. Towing question?

    By mbsfgts,
    • 9 replies
    • 589 views

  4. Please help with a towing question 1 2

    By Pfc1,
    • 15 replies
    • 954 views

  5. Engine light on 2401 miles 1 2

    By Jnuehring,
    • 28 replies
    • 1,065 views

  6. 2019 Chev 3500HD L5P Shutting Off

    By Pedro DeLeon Jr,
    • 5 replies
    • 421 views

  7. Allison Transmission

    By Teach,
    • 0 replies
    • 298 views


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