New 2024 Gmc Sierra Hd Slt. 2024 gm hd pickup specifications. Gmc unveiled the 2024 sierra hd today, releasing full details on the truck’s style, performance, towing capabilities, and more (basically everything but mileage and pricing) plus.

The 2024 gmc sierra hd features two new trims designed to boost the truck’s appeal (and sticker price): Gm unveiled the fully refreshed 2024 gmc sierra hd earlier this month, debuting a variety of important updates and changes.