The New 2026 GMC Sierra 3500 HD: Release Date, Changes, and Specs. During this year, the potential 2026 GMC Sierra 3500 HD will be presented to the public after undergoing some modifications. Generally speaking, the new model is subjected to a great deal of adjustments and improvements. General Motors is planning to combine further design features from the Sierra 1500 into the Sierra 3500 HD. Individually, each of the two models will establish a design language that is easily recognizable. A greater number of standard amenities will be included in the 2025 GMC Sierra in comparison to the previous generation of the vehicle. As was the case with its predecessor, the heavy-duty truck known as the 3500 will be available in a total of four different trim levels and three […]
