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.
