DETROIT - General Motors has upgraded its Duramax 6.6L, V-8, turbo-diesel engine to meet government-mandated emissions regulations for diesel engines manufactured beginning in Jan. 2007. To meet the new emissions regulation, the Duramax 6.6L V-8 engine features:

  • Additional combustion control, including a more efficient variable-geometry turbocharging system, cooled (enhanced) Exhaust Gas Recirculation (EGR) and closed crankcase ventilation to reduce NOx.
  • Additional exhaust control, including oxidizing catalyst and new diesel particulate filter to reduce soot and particulate matter.
  • Increased-capacity cooling system.
  • New engine control software.

    The new Duramax 6.6L, V-8 (LMM) engine is offered with increased power and torque for Chevy Kodiak and GMC Topkick medium-duty applications. Versions are available with 300 horsepower and 520 lb.-ft. of torque, as well as a new 330-horsepower option with 620 lb.-ft. of torque.

  • Originally posted on Fleet Financials

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