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 city driving fell to a shocking 9 MPG.

Although diesel isn't a common fuel type in the United States these days, there are some who still buy diesel trucks because there are some advantages. For starters, new diesel trucks generally pull ...

Thomas has spent two years working in the auto journalism industry, contributing to a UK-based newspaper and writing for Euronewsweek. A full-time writer and lifelong engineering enthusiast, he now ...

Over 20 years ago GMC noticed a market developing for luxury pickup trucks. There was a subset of buyers that needed a truck’s capability, but still wanted the posh suppleness of a luxury sedan. The ...