The shocking backstory of how a Japanese company played a key role in developing the iconic Duramax diesel engine for GM's ...

The GM Crackerbox was an advanced truck during its 1960s heyday, characterized by its small cab and lightweight construction.

To make shopping for a used full-size SUV easier, we've compiled all of our past and present favorites—most of which have ...

Compare the 2026 Honda Ridgeline and 2026 GMC Sierra 2500HD. Uncover the best in specs, performance, and innovation for your next ride.

Chevrolet, Ford, Freightliner, and more offer updated 2026 medium-duty models with enhanced safety, tech, and alternative ...

The 1984 Chevy Celebrity wagon had some pretty impressive specs, including more towing capacity than a modern 2025 Chevy Traverse, as highlighted in this video.

With four engines and a range of configurations, the 2026 Chevy Silverado 1500 offers competitive tow ratings, and now, GM Authority is taking a closer look.

Most people buy extended warranties on used vehicles primarily for financial security to cover unexpected and potentially ...

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

GM's Twin Six V12 engine weighed just under 1,500 pounds. It was primarily used for commercial vehicles, including large ...

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 ...

There are many applications for diesel engines. Turbos make them faster and more fuel efficient, but do all diesel engines ...