A GMC Sierra 1500 owner is stunned that his diesel truck delivers a "shockingly good" 23.5 MPG on logging roads, even with ...

General Motors and Allison Transmission share a long history, but that's all going to change at the end of this year. Here's ...

A 2025 GMC Sierra 3500 AT4 owner is reeling after his brand-new diesel dropped from 24 MPG highway to a measly 17 MPG, and ...

A lot of cost and a lot of chaos-that’s how Ford CEO Jim Farley summed up the current state of the US auto industry. The same turbulence now ripples into General Motors’ heavy-duty truck lineup, where ...

SEMA 2025 is live in Las Vegas, showcasing the latest truck and diesel-performance parts, accessories, and innovations that ...

GM is taking the unprecedented step of removing some of the badging on its unsold trucks starting in 2026. Here's how GM ...

When General Motors decided to make a diesel engine a permanent part of its light-duty truck lineup in 1982, it partnered with Detroit Diesel for a 6.2-liter V8 rated at 130 horsepower and roughly 240 ...

About two decades after the launch of the 6.6-liter Duramax V8, GM's 3.0-liter Duramax inline-six turbodiesel arrived in 2019 with a promise to deliver "outstanding fuel economy, great horsepower, and ...

Of the three United States automakers that offer diesel-powered heavy-duty pickup trucks, only two of those diesel engines are V8s. Those V8 diesel engines are the 6.6 Duramax found in offerings from ...

GM has issued a special coverage bulletin for certain units of the 2020 Chevy Silverado 1500 equipped with the 3.0L LM2 turbodiesel Duramax engine that may have been produced with a faulty glow plug ...

I wasn’t going to write this. I’ve refrained ever since I saw the rumor emerge about a week ago. But now that people are still talking about the so-called “big-block” Duramax, I feel like it’s time to ...