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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 through 2024+ Chevrolet Silverado 2500 / 3500 or 2020 GMC Sierra 2500 / 3500


177 topics in this forum

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  1. Tuners Wanted

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  2. Trailer running light fault

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  3. Service Mode

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  4. fifth wheel hitch

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  5. 2021 2500 AT4 payload

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  6. ibanks 1.8

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  7. OEM Steel Rim Size

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  8. 35'S ON 2020 2500

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  9. Killing a Duramax

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  10. 3 inch cognito lift

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  11. Transmission

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  12. Hot plastic smell

    • 3 replies
    • 5.4k views


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