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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

51 topics in this forum

  1. Ticking sound at idle

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  2. 2020 L5P First Oil Change 1 2 3

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  3. Towing question? 1 2

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