What kind of vehicle is the 2024 GMC Sierra 2500HD? What does it compare to? The 2024 GMC Sierra HD is a full-size, heavy-duty pickup that shoulders up against other big rigs such as the related Chevrolet Silverado 2500HD, as well as the Ram 2500 and Ford F-Series Super Duty. Is the 2024 GMC Sierra 2500HD a good truck? Capable, comfortable, and...