Allison 1000 Specs


Duramax Timeline

Duramax FAQ



6.6L Duramax Diesel

6.6L Duramax LB7

6.6L Duramax LLY

6.6L Duramax LBZ

6.6L Duramax LB7 - The LB7 was the very first Duramax to hit the showroom floor and remains a popular variant. It was available from 2001 to 2004.

6.6L Duramax LLY - The LLY was introduced in 2004 as a replacement to the LB7. It received major upgrades in 2006, before being retired late in the model year.

6.6L Duramax LBZ - Nearly identical to the revised LLY save higher horsepower/torque, the LBZ was offered in late 2006 to 2007 model years.

6.6L Duramax LML

6.6L Duramax LML

Allison 1000

6.6L Duramax LMM - The LMM was the first true "emissions friendly" Duramax, utilizing a DPF to cut particulate emissions. It was produced from 2007.5 to 2010 model years.

6.6L Duramax LML - The LML hit the HD truck scene for the 2011 model year and is stil currently offered. It is the most powerful and cleanest Duramax produced to date, thanks to an SCR system.

Allison 1000 Transmission - GM's ace in the hole has always been the Allison 1000 transmission, which has been offered in both 5 and 6 speed variations over the years, and makes the Duramax even more desirable.


6.6L Duramax Diesel Resources


Duramax Diesel Specs is your source for 6.6L Duramax diesel engine specs, tech, history, and information. The 6.6L Duramax, sometimes referred to as the Duramax 6600, was introduced for the 2001 model year to increase General Motor's competitive edge in the light duty diesel marketplace. The Duramax is optional in GMC Sierra HD and Chevrolet Silverado HD (2500 & 3500) pickups. A number of variants have been produced over the years; the LB7, LLY, LBZ, LMM, & LML, all of which are covered by The Allison 1000 has been the transmission of choice for Duramax owners, though a manual transmission has also been offered over the years. With the introduction of the latest variant, the LML, the Allison 1000 6 speed automatic is the only transmission available. Since inception, the Duramax Allison combination has become synonomous with performance, durability, and reliability. Whether you're a current Duramax owner, a prospective buyer, or just browsing, we've got the information you have been looking for.