1. What are the 2024 GMC Sierra HD Trucks?

GMC continues to build luxury full-size pickups, this time bringing a big deal of luxury to its heavy-duty lineup. The 2024 GMC Sierra HD will be headlined by a new Denali Ultimate trim, similar to last year's Sierra 1500 Ultimate light-duty truck. That means it will feature an interior bathed in beautiful leather and wood trim, kosher seats, and the latest tech features in the lineup.

The truck's many changes include an increased tow range, a new 10-speed transmission for the gasoline V8, styling and interior updates, and new tech and active safety features. Its one-off off-road oriented AT4X trim will be available later next year, and it will likely follow the lead of its light-duty counterpart, with a firmer long-travel suspension and two-speed transfer case, and include front and rear locking differentials among other trail-ready components.