GMC Sierra 3500 HD

6.6L Duramax LMM Specs

The need to meet strict Federal emissions standards in the United States resulted in the Duramax LMM, the first Duramax to feature a diesel particulate filter. The LMM's rated power only marginally topped the LBZ (2007.5 - 2010 model years).

 

6.6L Duramax LBZ

6.6L Duramax LBZ Specs

As the evolution of the Duramax diesel continued, the LBZ rolled out to replace the LLY. The more powerful LBZ is often referred to the "Hot Rod" of the Duramax engine family as a result of its huge performance potential (2006 - 2007 model years).

2006 Chevrolet diesel

6.6L Duramax LLY Specs

Building upon the LB7's design, the Duramax LLY introduced a VVT turbocharger. For the 2006 MY, the LLY received several enhancements, including an upgraded injector design and higher maximum injection pressure (2004 - 2006 model years).

2001 Chevrolet 2500

6.6L Duramax LB7 Specs

General Motor's joint venture with Isuzu, "DMax", produced the original 6.6L Duramax V-8. Featuring a high pressure common rail injection system and 4v per cylinder valvetrain, the Duramax replaced the long outdated Detroit diesel (2001 - 2004 model years).

2006 GMC Sierra HD

2006 Duramax LLY Changes

Comprehensive list of changes made to the 6.6L Duramax LLY for the 2006 model year, resulting in significant performance gains.

Allison 1000 transmission

Allison 1000 5 & 6 Speed Transmission Specs

The Allison 1000 five and six speed transmission has been the only automatic available mated to the Duramax diesel; specs & ratios here.

Duramax-Allison emblem

Duramax VIN Decoding Guide

Easily identify which Duramax diesel your truck is equipped with by looking at your vehicle's VIN number.

Duramax horsepower chart

Duramax Horsepower & Torque by Model Year

Chart showing rated horsepower and torque, broken down by model year and engine variation (LB7, LLY, LBZ, LMM, LML).

GMC Topkick

7.8L Duramax LG4 Specs

Essentially an Isuzu 6H series, the 7.8L Duramax is an inline 6 turbodiesel optional in 2003 to 2009 medium duty truck applications.

6.2L GM Diesel

6.2L GM/Detroit Diesel Specs

The 6.2L GM diesel was designed by Detroit diesel. The engine, introduced in 1982, was designed primarily as an economical alternative to gas guzzlers of the period.

6.5L Detroit diesel engine

6.5L GM/Detroit Diesel Specs

The 6.5L GM diesel was an evolution of the 6.2L, designed to compete with more powerful diesel options of the time period.

4.5L Duramax LMK

4.5L Duramax LMK Concept

The 4.5L Duramax LMK was introduced as a possible option for the Silverado and Sierra 1500 models but has since been dispelled.