2026 GMC Sierra Pro L/box Duramax 

in Quebec 

Meet the brand new 2026 GMC Sierra Pro L/box Duramax, now at Theetge Chevrolet Buick GMC in Québec. Finished in Black with a Black interior, this full-size truck delivers the strength, durability, and everyday usability drivers expect from a Sierra. Its automatic transmission adds smooth operation, while the Duramax diesel focus brings proven low-end pulling power.

Built for work and ready for daily driving, the 2026 GMC Sierra Pro L/box Duramax offers a practical long box layout and a confident road presence. This new GMC truck is designed for drivers who want strong capability, simple function, and the dependability needed for busy job sites, long highway runs, and changing Québec conditions.

FEATURES OF THE Sierra Pro L/box Duramax

»» Duramax diesel power for strong pulling
»» Long box supports larger cargo loads
»» Full-size cabin with practical truck design
»» Automatic transmission for smooth daily driving

TRUCK FEATURES

»» Long box helps carry bulky equipment
»» Diesel torque supports demanding hauling tasks
»» Pickup design suits work and recreation
»» Strong frame built for truck duty

ADVANCED SAFETY FEATURES

»» Sturdy truck structure supports occupant protection
»» Large driving position improves forward visibility
»» Four-wheel disc brakes aid controlled stops
»» Daytime running lights help visibility

PERFORMANCE AND EFFICIENCY

»» Duramax diesel delivers strong low-end torque
»» Automatic transmission supports smooth power delivery
»» Full-size capability for work-ready performance
»» Diesel efficiency helps on long drives

COMFORT AND CONVENIENCE

»» Spacious cabin supports daily work comfort
»» Easy step-in height for regular use
»» Climate control helps year-round comfort
»» Practical layout keeps controls close

TECHNOLOGY AND CONNECTIVITY

»» Clear instrument display shows key information
»» User-friendly controls support quick operation
»» Modern truck design supports connected driving
»» Cabin layout keeps essentials within reach

CARGO SPACE

»» Long box offers generous load length
»» Wide bed suits tools and materials
»» Pickup bed handles everyday hauling needs
»» Useful space for work gear

WHAT OTHER OWNERS LIKE

»» Strong diesel torque for heavy tasks
»» Long box adds useful cargo flexibility
»» Comfortable cabin for daily truck use
»» Solid feel on highway drives

This 2026 GMC Sierra Pro L/box Duramax's VIN is: 1GT2ULEY7TF368397.