* Based on opinions and should be considered as general guidance only.
- Reliability (4)GMC heavy-duty trucks are generally known for their robustness. The 2018 model continues this trend with a strong powertrain and durable components, though like any complex vehicle, minor issues can arise.
- Maintenance (3)Maintenance costs are typical for a heavy-duty diesel truck. Parts and labor can be more expensive than for a light-duty vehicle, and specialized fluids and filters contribute to higher routine service expenses.
- Technology (4)Equipped with a user-friendly infotainment system, navigation, and various driver-assist features, the technology package is comprehensive and intuitive. Some might find the screen size a bit small compared to newer models, but it's fully functional.
- Comfort (5)The Denali trim truly shines in comfort. The cabin is exceptionally quiet, the seats are plush and supportive for long hauls, and the ride quality, while firm due to its HD nature, is remarkably smooth for its class.
- Dynamics (4)For a heavy-duty truck, the Sierra 3500HD Denali handles surprisingly well. It's stable on the highway and the steering is responsive enough for its size, though it's still a large vehicle.