6.6 L Duramax LMM

Nearly identical to the LBZ, the LMM debuted midway into the 2007 model year (2007.5). The slight variations between the LBZ and LMM gave the LMM a small boost in power output. The LMM features new emissions equipment that meet strict new diesel emission laws, and is currently in production today. Using a diesel particulate filter (DPF) and active regeneration technology, the LMM is able to cut particulate matter emissions by 90 percent.

 

6.6 L LMM Specifications:

 

Configuration:	V8
Displacement:	403 cubic inches, 6.6 liters
Compression Ratio:	16.8:1
Bore:	4.06 inches
Stroke:	3.90 inches
Aspiration:	Intercooler & variable geometry turbocharger
Valvetrain:	OHV, 4 valves per cylinder
Oil Capacity:	10 quarts w/filter
Weight:	approx. 835 lbs
*Horsepower:	365 hp @ 3,100 RPM
*Torque:	660 lb-ft @ 1,800 RPM

*output varies slightly with model year.

 

6.6 L LMM Information:

• LMM applications include the Chevrolet Silverado HD, GMC Sierra HD, Chevrolet Kodiak, GMC Topkick.
• Meets strict 2007 EPA mandated emission requirements for diesel engines.
• Emissions Equipment includes a diesel particulate filter, EGR cooler, & the use of active regeneration.
• Emissions equipment lowers fuel efficiency considerably over previous models.