Attention: If you have a GM Duramax, please verify your engine type before ordering any product. Many of the products we offer are not interchangeable with all Duramax engine types. To Verify: Check the 8th digit in the VIN number,

 

VIN Code 1 – LB7 (2001-2004)

VIN Code 2 – LLY (2004.5-2006)

VIN Code D – LBZ (2006-2007)

VIN Code 6 – LMM (2007.5-2010)

VIN Code 8 – LML (2011-2016)

Midway through the 2007 model year the 6.6L Duramax LMM engine was introduced. During this production year, GM also reached a milestone of the 1,000,000th Duramax V8 engine coming off the assembly line. Since the LMM was released in the same year as the LBZ engine it would be unofficially referred to as the 2007.5 model. This generation of GM Silverado/Sierra 2500HD/3500HD pickups was all new and received brand-new body styles, suspension components, and reinforced frames. The Duramax LMM engine also included some upgrades to handle the increased horsepower and torque over the previous generation.

 

The robust foundation of a deep-skirt cast-iron block mated with cast-aluminum heads carried over from the previous generation Duramax. The cast-aluminum cylinder heads featured larger coolant passages to better dissipate the heat. Inside the Duramax LMM were the same heavy-duty cast-aluminum pistons and forged steel connecting rods as its predecessor. The high-pressure common-rail fuel system would still be powered by a Bosch CP3 injection pump with 26,000 PSI rail pressure. The Bosch solenoid-style fuel injectors were updated to a 6-hole design with 159-degree spray angle for a more efficient combustion process. Fitted to the 6.6L Duramax LMM was a Garrett GT3788VA variable-vane turbocharger that delivered increased airflow to lower exhaust gas temperatures and improve throttle response.

 

The 6.6L Duramax LMM had an increase in horsepower and torque. In 2007.5 the Duramax LMM was rated at 365 hp and 660 lb-ft of torque. To handle the increased power of these Duramax-powered trucks, they were paired with the Allison 1000 6-speed automatic transmission with dual overdrive. The commercial-grade 6-speed Allison 1000 transmission had proved to be a great combination with the Duramax engines and would be utilized until the 2019 model year, when it was replaced with the 10-speed 10L1000 Allison in 2020.Factory and aftermarket parts for this generation of Duramax-powered trucks are still readily available. Cyberpunk Diesel carries parts from hundreds of the top manufacturers to provide you everything your Duramax LMM needs. If you’re looking to perform routine maintenance, Cyberpunk Diesel carries high-quality Fuel Filters and Oil Filters to keep your engine running its best. Get the most out of your Duramax with Fuel Lift Pumps, Performance Fuel Injectors or Turbo Upgrades. Cyberpunk Diesel also carries Chips, Programmers, and Modules so you can boost horsepower and torque in your GM Silverado/Sierra 2500HD/3500HD. Shop Cyberpunk Diesel today for all the parts your 2007.5-2010 GM 6.6L Duramax LMM needs.