* Based on opinions and should be considered as general guidance only.
- Reliability (4)GMC Sierra HD trucks generally have a good reputation for reliability, and the 2019 model is no exception. Owners often report few major issues, especially with proper maintenance.
- Maintenance (3)Maintenance costs are typical for a heavy-duty truck; parts and labor can be more expensive than for a light-duty vehicle. However, the service intervals are reasonable.
- Technology (3)The infotainment system is user-friendly and includes Apple CarPlay/Android Auto, which is a plus. However, some of the driver-assist features feel a bit dated compared to newer models, and the screen resolution could be better.
- Comfort (4)The SLT trim offers a comfortable interior with quality materials. The seats are supportive for long drives, and the cabin is relatively quiet, even at highway speeds, which is impressive for a truck of this caliber.
- Dynamics (4)For a heavy-duty truck, the 2019 Sierra 3500HD SLT handles surprisingly well, especially considering its towing and hauling capabilities. Steering is responsive for its size, and it feels stable on the highway.