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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


164 topics in this forum

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  4. 2021 Diesel break in 1 2 3

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  5. PTO Question

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  6. 2500 mods

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    • 2.3k views
  7. diesel fuel additives

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  8. OEM Fuel filtration

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    • 22.5k views


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