Featured Duramax & General Motors Diesel Tech

2017 Duramax L5P

2017 6.6L Duramax L5P Specs

GM's new Duramax is here, rated at a pavement stomping 445 horsepower and 910 lb-ft of torque. Changes including greater coolant and lubrication flow, induction hardened cylinder walls, and an electronically actuated variable geometry turbocharger.


2016 Chevrolet HD
2017 Diesel Buyers Guide

Comparison between GMC, Chevrolet, Ford, and Ram diesel powered pickups. See how the competition stacks up with regards to power and capability for the 2017 model year.

Chevrolet Colorado Duramax diesel
Chevrolet Colorado, GMC Canyon get 31 mpg Duramax Diesel

Overview of the 2.8L Duramax powered GMC Canyon and Chevrolet Colorado midsize pickups, which have earned up to an EPA rated 31 mpg.

Allison 1000 transmission
Allison 1000 Transmission Tech

Allison 1000 transmission specs, ratios, and service information. The Allison 1000, Duramax diesel combination has been the tried-and-true powertrain package for GMC and Chevrolet HD pickups since there introduction for the 2001 model year.

Allison, Duramax engine badge
Duramax Diesel Maintenance Schedule

Service intervals for all generations of the 6.6L Duramax diesel - LB7, LBZ, LLY, LMM, and LML.

ZF S6-650 manual transmission
ZF S6-650 Six Speed Manual Transmission

The ZF S6-650 manual transmission was available in Duramax equipped GMC and Chevrolet pickups for the 2001 to 2006 model year, before General Motors retired a manual transmission option from the HD pickup line indefinitely in favor of the popular Allison 1000 automatic.

4.5L Duramax diesel engine
4.5L Duramax V-8 Concept for the Silverado/Sierra 1500

Once a planned offering for Sierra and Silverado 1500 models, the 4.5L Duramax is now nothing more than a concept, although GM has hinted that they'd like to revisit the idea.

Chevrolet High Country trim package

'High Country' Trim available for Silverado HD Models

GM's Chevrolet pickup brand extends the "High Country" trim package to 2500 and 3500 HD models.

6.6L Duramax L5P

V-8 Turbodiesel

445 hp @ 2,800 rpm

910 lb-ft @ 1,600 rpm

6.6L Duramax LML

V-8 Turbodiesel

397 hp @ 3,000 rpm

765 lb-ft @ 1,600 rpm

6.5L GM/Detroit Diesel

V-8 Turbodiesel

215 hp @ 3,200 rpm

440 lb-ft @ 1,800 rpm

6.6L Duramax LML Specs 6.6L Duramax LMM Specs 6.5L GM/Detroit Diesel Specs
Duramax Performance FAQ 6.6L Duramax LLY Specs 6.2L GM/Detroit Diesel Specs
Duramax Fuel Water Separator New Venture NV4500 Manual Transmission GM 4l60 Transmission Tech
DPF Delete Considerations Supercharging for Diesels Explained GM 4l80 Transmission Tech