2026 GMC Sierra 2500 AT4 

in Lasalle, near Lachine and Verdun 

Meet the brand new 2026 GMC Sierra 2500 AT4 at Chevrolet Buick GMC de LaSalle in Lasalle. This heavy-duty truck pairs a bold black exterior with a black interior and a strong 6.6 L diesel engine. With four-wheel drive, four doors, and an automatic transmission, the 2026 GMC Sierra 2500 AT4 is built for hard work, rough weather, and daily comfort.

This new truck is made for drivers who want real capability without giving up ease of use. The 2026 GMC Sierra 2500 AT4 stands out with practical equipment that matters, including a sunroof, engine block heater, steps, backup camera, and automatic transmission. It is ready for job sites, long highway runs, and weekend towing duties.

FEATURES OF THE Sierra 2500 AT4
»» Off-road tuned heavy-duty truck capability
»» Four-wheel drive for added traction
»» Diesel power for serious pulling strength
»» Practical steps ease cabin access

TRUCK FEATURES
»» Heavy-duty design supports demanding work
»» Four-wheel drive helps on loose surfaces
»» Diesel engine built for strong hauling
»» Large truck format adds utility

ADVANCED SAFETY FEATURES
»» Backup camera helps with reverse views
»» High driving position improves road awareness
»» Four doors support easy passenger access
»» Strong truck build inspires confidence

PERFORMANCE AND EFFICIENCY
»» 6.6 L diesel engine delivers torque
»» Automatic transmission supports smooth power delivery
»» Four-wheel drive boosts traction year-round
»» Engine block heater aids cold starts

COMFORT AND CONVENIENCE
»» Sunroof brings in light and air
»» Side steps help easier entry
»» Four-door cabin improves daily usability
»» Spacious layout suits work and travel

TECHNOLOGY AND CONNECTIVITY
»» Backup camera display supports easier parking
»» Automatic transmission simplifies busy driving
»» Clear controls support quick operation
»» Useful driver information stays in view

CARGO SPACE
»» Pickup bed supports gear and tools
»» Heavy-duty format suits larger loads
»» Cabin offers room for personal items
»» Truck design helps daily job use

WHAT OTHER OWNERS LIKE
»» Strong diesel torque for towing confidence
»» Four-wheel drive in changing conditions
»» Easy entry with integrated steps
»» Useful camera view while reversing

WARRANTY

This 2026 GMC Sierra 2500 AT4's VIN is: 1GT1UPEY6TF298376.