eturn to Duramax Diesel Specs.

 

Duramax Diesel Timeline

Horsepower & Torque by Model Year

 

Model Year

Horsepower

Torque

Comments

2001

235 hp @ 2,700 rpm

500 lb-ft @ 1,600 rpm

LB7 introduced.

2002

235 hp @ 2,700 rpm

500 lb-ft @ 1,600 rpm

2003

235 hp @ 2,700 rpm

500 lb-ft @ 1,600 rpm

2004

LB7: 300 hp @ 3,100 rpm
LLY: 310 hp @ 3,000 rpm

LB7: 520 lb-ft @ 1,800 rpm
LLY: 520 lb-ft @ 1,600 rpm

The LLY was introduced in 2004 and replaced the LB7 completely mid-year.

2005

310 hp @ 3,000 rpm

520 lb-ft @ 1,600 rpm

2006

LLY: 310 hp @ 3,000 rpm
LBZ: 360 hp @ 3,200 rpm

LLY: 605 lb-ft @ 1,600 rpm
LBZ: 650 lb-ft @ 1,600 rpm

The LBZ was introduced in 2006 and eventually replaced the LLY by 2007. The 2006 LLY featured many changes to boost torque.

2007

LBZ: 360 hp @ 3,200 rpm
LMM: 365 hp @ 3,100 rpm

LBZ: 650 lb-ft @ 1,600 rpm
LMM: 660 lb-ft @ 1,800 rpm

The LMM was introduced mid-year 2007 and replaced the LBZ.

2008

365 hp @ 3,100 rpm

660 lb-ft @ 1,800 rpm

2009

365 hp @ 3,100 rpm

660 lb-ft @ 1,800 rpm

2010

365 hp @ 3,100 rpm

660 lb-ft @ 1,800 rpm

2011

397 hp @ 3,000 rpm

765 lb-ft @ 1,600 rpm

Duramax LML replaces LMM.

2012

397 hp @ 3,000 rpm

765 lb-ft @ 1,600 rpm

 

2013

397 hp @ 3,000 rpm

765 lb-ft @ 1,600 rpm

 

2014

397 hp @ 3,000 rpm

765 lb-ft @ 1,600 rpm