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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

68 topics in this forum

  1. 2500 mods

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  2. diesel fuel additives

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  3. 2020 GMC AT4 Garbage Brakes!

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  4. High Idle

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  5. Regen?

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