LMM Duramax Specifications & Information

LMM Duramax Specifications

When talking about the LMM Duramax, we are referring to the Chevrolet Silverado HD and GM Sierra HD trucks that are fitted with the 6.6L Duramax engine, these are made between the years 2007.5-2010.

It is very similar and can be confused with the LBZ, however, it features a fantastic and all-new emissions device. This device was a diesel particulate filter. 

There were many pros and cons to this system. One of these pros was that it reduced the emissions output substantially and to must joy of its consumers. However, there was a con that came with this, this being that the DPF system of the LMM resulted in these awe inspiring trucks having outrageously disappointing fuel economy. 

There are causes and reasons for this, the primary cause of this disappointingly low fuel economy is down to the post-injection regeneration method used in the engine. 

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Though there are also positives to this system, it is viewed as more of an issue than a compliment to the set-up. The DPF system and the regeneration process that it uses, is probably one of the most outstanding issues that the LMM Duramax truck suffers from. 

Despite the less admirable sides of the DPF system and the issues that it creates, the LMM Duramax is still very reliable and is a capable diesel engine system. Below we have provided a handy specifications chart so that you can easily find all the information you need on this engine and truck. 

Specifications & Information for the LMM Duramax

Years Product Manufactured For:

2007.5-2010

Engine Design:

6.6L, 90-Degree, V8, Turbocharged Diesel Engine.

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 Material:

Cast Aluminum

Crankshaft Material:

Forged Steel

Connecting Rods Material:

Forged Steel

Compression Ratio:

16.8:1

Firing Order:

1-2-7-8-4-5-6-3

Turbocharger/Air:

Garrett GT3788VA Variable Vane Turbocharger, with Intercooler

Fuel Injection:

Direct Injection High-Pressure Common Rail, with a Bosch CP3 Injection Pump,

Valvetrain:

Overhead Valve (OHV) with 4 Valves per cylinder (32V)

Engine Oil Capacity:

10 Quarts With Filter.

Fuel:

Diesel Fuel.

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.

Towing Capacity and Specifications

If you are looking at something such as 2008-2010, the Chevy HD, and GMC Diesel model, you are probably wondering about its towing capacity.

When it comes to looking at LMM Duramax Towing specifications, these will vary due to several different factors, such as the year of manufacturing, the cab configuration, and a few other factors as well. As is fairly standard in many vehicles, a rear-wheel-drive drink will increase your overall towing capacity, this is the same with this model. 

Similarly Dually models will also sport a larger and much better overall towing capacity. However, if you are looking for an idea of the towing capacity you are looking at, then the maximum conventional towing capacity that is available for the 6.6L LMM Duramax is around 13,000lbs, which is about the weights of an elephant, which would also allow you to easily tow and average SUV weighing at around 4,799lbs. 

When equipped dually, the LMM would be capable of towing up to 16,700lbs with a fifth-wheel hitch, which although unlikely, would mean the ability to tow 3 average SUV’s all weighing 4,799lbs. While the DPF system is a slight let down of this engine, the towing capacity of the LMM compensates for it.