Used 2021 GMC Sierra 2500HD AT4

* Based on opinions and should be considered as general guidance only.

• Reliability (4)
  4 out of 5 stars
  GMC trucks generally have a good reputation for reliability, and the 2500HD AT4 is expected to follow suit. The powertrain options are proven, and the build quality feels robust, suggesting a long service life with proper maintenance.
• Maintenance (3)
  3 out of 5 stars
  Maintenance costs for heavy-duty trucks can be higher than for passenger vehicles due to larger components and specialized fluids. While routine maintenance is straightforward, parts and labor for more significant repairs can be expensive.
• Technology (4)
  4 out of 5 stars
  GMC provides a solid suite of technology in the Sierra AT4, including a user-friendly infotainment system with Apple CarPlay and Android Auto. The available camera views are particularly helpful for trailering and parking. Advanced safety features are also present and function effectively.
• Comfort (4)
  4 out of 5 stars
  The AT4 trim offers a comfortable interior with supportive seats, even on long drives. The ride quality is good for a 3/4-ton truck, absorbing most road imperfections without excessive harshness. Cabin noise is also well-controlled.
• Dynamics (4)
  4 out of 5 stars
  For a heavy-duty truck, the Sierra 2500HD AT4 handles surprisingly well. The steering is responsive, and body roll is managed effectively, especially considering its size and off-road capabilities. It feels stable on the highway and capable on rough terrain.