Duramax 6.6L Engine
Upgrades implemented in 2006 enhanced the efficiency, smoothness and quietness of the Duramax 6.6L engine. Which was already known as one of the industries quietest and strongest diesels.
The original Duramax was a vast improvement over GM’s previous indirect-injection diesel. And it beat both Dodge and Ford to the punch when it debuted for the ’01 model year. Two more years would pass before Cummins-equipped trucks were upgraded to common-rail injection. However it was another few months after that before Ford joined the higher-pressure party with its HEUI 6.0L Power Stroke engine. It wasn’t until the ’08 model year that Ford came to market with a true high-pressure common-rail—in the form of the 6.4L Power Stroke.
Until the introduction of the Duramax, GM relied on the all-iron, IDI 6.5L GM V-8. Which produced a decent 215 hp and 440 lb-ft of torque in its most powerful configuration. The new, aluminum-headed 6.6L Duramax V-8 hit the market with a very impressive 300 hp and 520 lb-ft of torque in its first configuration. And it has only gotten stronger with age. While still meeting increasingly strict emissions requirements.
This same Chevy duramax diesel engine is available at Roadmaster Engine World for only $4375 exchange. Many of our customers request the ARP head studs. We can remanufactured these Duramax engines with the ARP studs for an additional $650.
DURAMAX VIN CHART
| Model Year(s) | 8th Digit of VIN | Duramax Model & Notes |
| 2001 – 2004 | 1 | LB7 |
| 2 | LLY (introduced midyear 2004) | |
| 2005 | 2 | LLY (only engine offered for 2005) |
| 2006 | 2 | LLY (2006 version, different from 2005 version) |
| D | LBZ (introduced late 2006) | |
| 2007 | D | LBZ |
| 6 | LMM | |
| 2008 – 2010 | 6 | LMM (only Duramax offered during these years) |
| 2011 – 2016 | 8 | LML |
| L | LGH | |
| 2017 | Y | L5P |
Satisfaction and peace of mind is what you experience when buying from Roadmaster. You won’t find better customer service and the thoroughness we offer to make sure what you’re looking for is correct. We know that’s what you expect. Buy from Roadmaster and you won’t be disappointed.
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Head Gasket Design Change On 2001-06 GM 6.6L Duramax Diesel Engines.
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