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6.6L Duramax Diesel (L5P)

The torque monster. Tuning, maintenance, and exhaust discussion for the L5P Duramax and 10-speed Allison transmission.

205 topics in this forum

  1. Engine light on 2401 miles 1 2 3

    By Jnuehring,
    • 40 replies
    • 8.5k views

  2. 10 speed Allison Transmission 1 2 3

    By Double Dkar,
    • 41 replies
    • 61.9k views

  3. Allison Transmission

    By Teach,
    • 0 replies
    • 2k views

  4. 2019 Chev 3500HD L5P Shutting Off

    By Pedro DeLeon Jr,
    • 7 replies
    • 5.8k views

  5. Please help with a towing question 1 2

    By Pfc1,
    • 21 replies
    • 4.8k views

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