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  1. General Discussion
    I bought a 2020 Silverado 2500 HD LT. Noticed when I accelerate past 50% when I let off the rpms kind of hang around 2000 for a second before it shifts. Not sure if that is normal??
    duramax help rpm
  2. 06-07 LBZ & LLY Duramax Powertrain
    I can't find it anywhere, does anyone have a dyno run of their bone-stock 06 or 07 Chevy Express Duramax 6.6L LLY? Better yet, an official curve from GM or Chevy? I'm looking specifically for an 06 or 07 Chevy Express G3500, but I understand that an almost identical configuration was used in...
    chevy express g3500 rpm torque
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