2026 GMC 2500 AT4 for Sale: A Comprehensive Overview
The 2026 GMC 2500 AT4 is a robust entry in the heavy-duty truck segment, designed for both work and play. Positioned as a premium offering within GMC’s Sierra lineup, the AT4 variant emphasizes off-road capability while maintaining a luxurious interior. Key competitors in this segment include the Ford F-250 Super Duty, Ram 2500, and Chevrolet Silverado 2500HD.
What’s New
- Updated exterior styling with a more aggressive front fascia
- Enhanced off-road capabilities with improved suspension
- New technology features including an upgraded infotainment system
- Additional driver assistance features for improved safety
- New color options and interior materials for a more premium feel
What We Think
The updates to the 2026 GMC 2500 AT4 enhance its appeal as a versatile heavy-duty truck. The refreshed styling and improved off-road capabilities make it a strong contender in its class. However, while it excels in ruggedness and luxury, some may find its fuel economy less competitive compared to lighter-duty trucks. Overall, the GMC 2500 AT4 stands out for those seeking a blend of performance and comfort.
Performance and Fuel Economy
The 2026 GMC 2500 AT4 offers two engine options:
- 6.6L V8 Gas Engine: Produces 401 horsepower and 464 lb-ft of torque.
- 6.6L Duramax Turbo-Diesel V8: Delivers 445 horsepower and an impressive 910 lb-ft of torque.
The truck is paired with a six-speed automatic transmission, providing smooth shifts and reliable performance. The AT4 features an available four-wheel-drive system, enhancing its off-road capabilities. Acceleration from 0-60 mph is estimated at around 7.5 seconds for the gas engine, while the diesel variant may take slightly longer due to its weight.
Estimated fuel economy figures are:
- Gas engine: Approximately 14 MPG city / 18 MPG highway
- Diesel engine: Approximately 18 MPG city / 22 MPG highway
Engine Options
6.6L V8 Gas Engine
This engine provides ample power for towing and hauling, making it suitable for heavy-duty tasks while offering decent fuel efficiency for its class.
6.6L Duramax Turbo-Diesel V8
The diesel option excels in torque delivery, making it ideal for towing heavy loads. It offers better fuel economy compared to the gas engine, appealing to those who prioritize efficiency alongside power.
Safety and Driver Assistance Features
- Standard Safety Features:
- Forward Collision Alert
- Automatic Emergency Braking
- Lane Departure Warning
- Rear Vision Camera
- Adaptive Cruise Control
- Blind Zone Alert
- Rear Cross Traffic Alert
- Hands-Free Driving Assist (available on select trims)
- Front Legroom: 44.5 inches
- Rear Legroom: 43.4 inches
- Cargo Bed Lengths:
- Standard Bed: Approximately 69.5 cubic feet
- Long Bed: Approximately 83.5 cubic feet
- Main Display: A standard 13.4-inch touchscreen with intuitive interface.
- Connectivity:
- Apple CarPlay and Android Auto compatibility.
- Bluetooth connectivity for hands-free calling.
- Bose premium audio system available on higher trims.
- Head-Up Display (HUD) for enhanced visibility of key information.
- A surround-view camera system for improved parking assistance.
- SLE: Starting at $42,000 – Basic features with essential technology.
- SLT: Starting at $50,000 – Adds luxury touches and advanced safety features.
- AT4: Starting at $60,000 – Off-road enhancements and premium interior materials.
- DENALI: Starting at $70,000 – Top-tier luxury with advanced technology and exclusive styling elements.
Interior, Cargo Space, and Dimensions
The interior of the GMC 2500 AT4 is designed with comfort and functionality in mind. It offers spacious seating for up to five passengers with ample legroom:
Cargo capacity is impressive, with:
This cargo space is competitive when compared to rivals like the Ford F-250 and Ram 2500, which offer similar dimensions.
Technology and Infotainment
The infotainment system in the GMC 2500 AT4 has been upgraded for the 2026 model year:
Trim Levels and Pricing
The GMC 2500 AT4 is available in several trims, each offering distinct features:
Pros and Cons