That all said, the fuel savings does come at the cost of the consumable diesel exhaust fluid. DEF is a mixture of synthetic ...

Most diesel truck owners understand how to put diesel exhaust fluid (DEF) in their trucks. However, some make the mistake of getting DEF in their fuel tank instead of the dedicated DEF tank. As the ...

If you are tired of eating up front disc brakes and having to lay on the brake pedal longer than you’d like when your late-model GM HD pickup is towing a big gooseneck or heavy tow-behind trailer, we ...

Certain units of 2020 through 2024 GMC Sierra 1500 and 2020 to 2024 GMC Sierra HD pickup trucks, as well as 2021 to 2024 GMC Yukon SUVs, equipped with one of several available Duramax diesel engines, ...

We recently attended a seminar on the new 4.5L LMK Duramax that will be making an appearance in light-duty trucks for 2010. This potent mill will not only have at least 310 hp and 520 lb-ft of torque ...

Known under the VIN code Y, the L5P Duramax is the latest evolution of the 6.6-liter turbo diesel that powers the Silverado HD and Sierra HD. Introduced for the 2017 model year and mated exclusively ...

We’ve shown you spy photos and shared what our sources have told us, but now GM has pulled back more of the veil surrounding its next-generation heavy-duty Duramax diesel V-8 engine program. The ...

Optimum exhaust flow is critical to maximizing the efficiency of any engine. After all, an engine is just a sophisticated air pump – and the easier it is to move air in and out, the more efficient the ...

The next-generation turbo-diesel 6.6-liter Duramax engine, set to debut in the 2017 Chevrolet Silverado heavy-duty and GMC Sierra heavy-duty pickup trucks, will offer more torque, power and fewer ...

For the '06 model year GM will show the truck world that it means business by offering a 360hp and 650-lb-ft of torque Duramax (LBZ RPO code) engine. We got an early glimpse of this new diesel ...