Featured Duramax & General Motors Diesel Tech

Chevrolet 3500 HD
6.6L Duramax Diesel Maintenance Schedule and Service Guide

Maintenance schedule, fluid capacities, and parts guide for all generation 6.6L Duramax diesels.


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.

Chevrolet Colorado Duramax diesel
Chevrolet Colorado, GMC Canyon 2.8L Duramax Diesel

Overview of the 2.8L Duramax powered GMC Canyon and Chevrolet Colorado midsize pickups, which feature an EPA rated 30 mpg on the highway.

NV4500 manual transmission with PTO cover removed
New Venture NV4500 Transmission Service Procedures

How to properly service the NV4500 5 speed manual transmission, including important information on fluid selection.


2017 Toyota Tacoma
Chevrolet Colorado, GMC Canyon vs Toyota Tacoma

How do the Chevrolet Colorado and GMC Canyon stack up against Toyota's midsize segment leader?


6.5L diesel engine in GMC C3500HD
6.5L GM Diesel Specs and History

Information on the 6.5L GM diesel, which was produced for Chevrolet and GMC fullsize trucks from 1992 through 2002.

GMC C/K pickup with 6.2L diesel
6.2L GM Diesel Specs and History

Information on the 6.2L GM diesel, which was produced for Chevrolet and GMC fullsize trucks from 1982 through 1993 before replaced by the larger 6.5L.

ZF S6-650 manual transmission
ZF S6-650 6 Speed Transmission Specs and Ratios

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.

C3500HD king pin
C3500HD King Pin Replacement Procedures

How to rebuild the king pins on the I-beam front axle found on heavy duty C3500HD model trucks by Chevrolet and GMC.

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 6.2L and 6.5L GM Diesel Overheating Problems
Duramax Performance FAQ 6.6L Duramax LLY Specs GM 4l60 Transmission Tech
Duramax Fuel Water Separator New Venture NV4500 Manual Transmission GM 4l80 Transmission Tech