The GMC Sierra AT4X made its big debut with the introduction of the fully refreshed 2022 GMC Sierra 1500, sliding in above the GMC Sierra AT4 as an even-more capable off-road trim level. Now, we’re ...

GMC has found another way to distinguish itself from Chevrolet. It has added an Off-Road Performance Package to the list of available equipment on the Sierra AT4. The upgrade brings along a cat-back ...

The current-generation GMC Sierra AT4 - whether in pre-refresh guise or refreshed form for the 2022 model year - offers impressive off-roading capabilities thanks to a list of rough-stuff extras and ...

Marketed as an off-road premium pickup truck, the 2019 GMC Sierra AT4 ticks all the right boxes. But if you wish to stand out from the crowd, the Off-Road Performance Package is right up your alley!

One thing the 2019 GMC Sierra AT4 doesn’t lack is capability but now you can make it even stronger with the newly-available Off-Road Performance Package. Adding factory-installed performance upgrades, ...

Goliath! Technically, it's a biblical name. However, in the truck scene, and when it comes to bad-ass performance rigs, Goliath is the moniker that speed mavens at Hennessey Performance Engineering of ...