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

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.

The 2024 GMC Sierra AT4X is getting an upgraded powerplant for the new model year. Where it once solely featured GM’s 6.2-liter V8 truck engine, it’s now set to offer Duramax diesel power as standard.

Talking about the "best" of anything can lead to quite the slippery slope. Thankfully, fuel economy is a rather straightforward subject thanks largely to the U.S. Environmental Protection Agency. The ...

Within one week of each other, both Ram and GMC launched their latest light-duty diesel pickups at media drive events: the 2020 GMC Sierra 1500 Duramax diesel and the 2020 Ram 1500 EcoDiesel]. First, ...

The GMC Sierra’s 3.0-liter Duramax Diesel engine will produce 282 hp and 450 lb-ft of torque for 2019, TFL Truck reports. The publication received images of the figures from a Candian dealer site. The ...

The 2023 GMC Sierra 1500 will introduce a few updates and changes over the fully refreshed 2022 model year, dropping in as the fourth model year for the latest fourth-generation pickup. Critically, GM ...

For the 2021 model year, the full-size Tahoe and larger-than-life Suburban are available with no fewer than three engine options. The plusher GMC Yukon and even more luxurious Cadillac Escalade can be ...