LMM Duramax Specifications & Information
2008-2010 GMC Sierra & Chevy Silverado HD 6.6L LMM Duramax Specs
The LMM Duramax refers to Chevrolet Silverado HD and GM Sierra HD trucks equipped with the 6.6L Duramax diesel engine between the years of 2007.5-2010. It was very similar to the LBZ, but it featured an all-new emissions device, a diesel particulate filter. While it reduced emissions output drastically, the DPF system on the LMM resulted in these trucks having terrible fuel economy. This is mainly because of the post-injection regeneration method used. The DPF system and the regeneration process it undergoes is one of the LMM Duramax truck’s biggest problems. Despite the DPF system, the LMM Duramax is still a reliable and capable diesel. You can find everything you need to know about this truck in our LMM Duramax specifications chart below.
Picture courtesy of Chevrolet Media
| Manufactured Years: | 2007.5-2010 |
| Engine Design: | 6.6L 90-Degree V8 Turbocharged Diesel |
| Transmission: | 6-Speed Auto Allison 1000 Transmission |
| Vin Identification: (8th Digit) | 6 |
| Displacement: | 6.6 Liters or 403 Cubic Inches |
| Engine Weight: | 835 Lbs |
| Bore: | 4.055″ or 103 mm |
| Stroke: | 3.897″ or 99 mm |
| Block Material: | Cast Iron |
| Cylinder Head: | Cast Aluminum |
| Crankshaft: | Forged Steel |
| Connecting Rods: | Forged Steel |
| Compression Ratio: | 16.8:1 |
| Firing Order: | 1-2-7-8-4-5-6-3 |
| Turbocharger/Air: | Garrett GT3788VA Variable Vane Turbocharger And Intercooler |
| Fuel Injection: | Direct Injection High Pressure Common Rail with Bosch CP3 Injection Pump |
| Valvetrain: | Overhead Valve (OHV) 4 Valves per cylinder (32V) |
| Engine Oil Capacity: | 10 Quarts With Filter |
| Fuel: | Diesel |
| Fuel Tank Size: | Short Bed: 26 Gallons Long Bed: 34 Gallons |
| Max Engine Speed: | 3,250 RPM |
| Horsepower: | 365 horsepower |
| Torque: | 660 lb/ft of torque |
| Emissions Equipment | Diesel Particulate Filter Diesel Oxidation Catalyst Exhaust Gas Recirculation |
2008-2010 Chevy HD & GMC HD Diesel Towing Capacity
LMM Duramax Towing specifications vary according to year, cab configuration, and more. If you have a rear wheel drive truck your tow capacity will be slightly higher. Dually models will also have much better overall towing capacity. Maximum conventional tow capacity for the 6.6L LMM Duramax is 13,000 lbs. When equipped with a properly equipped dually, the LMM is capable of towing 16,700 lbs with a fifth-wheel hitch. For detailed LMM Duramax specifications, visit our Duramax tow capacity page.
| Receiver Size | 2″ |
Want More Duramax Information?
Check out some of the other Duramax trucks like the LML, LBZ, LB7 or LLY Duramax.
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