Experience premium comfort, diesel efficiency and professional-grade capability in this 2026 GMC Sierra 1500 SLT Crew Cab 4WD, available at MacFarlane Chevrolet Buick GMC in Petrolia, Ontario. Built for demanding work, confident towing and comfortable everyday travel, this Sierra SLT delivers the refinement and versatility expected from a premium full-size pickup truck.

The 3.0L Duramax Turbo-Diesel engine generates 305 horsepower and an impressive 495 lb.-ft. of torque. Paired with a smooth 10-speed automatic transmission and four-wheel drive, it provides strong low-end pulling power, composed highway performance and dependable traction through changing Southwestern Ontario road conditions.

Inside, the spacious Crew Cab provides generous passenger room and premium SLT appointments. Ten-way power-adjustable front seats with power lumbar support help provide personalized comfort, while the 13.4-inch GMC infotainment touchscreen and 12.3-inch digital Driver Information Centre keep entertainment, vehicle information and compatible connected features within easy reach.

Distinctive chrome grille details, chrome door handles and chrome front and rear bumpers give the Sierra SLT a refined and commanding exterior. The durable cargo bed offers practical space for tools, building materials, recreational equipment and everyday hauling. Available GMC trailering technology can help simplify hitching, trailer monitoring and towing tasks.

GMC Pro Safety provides advanced driver-assistance technologies designed to support greater awareness and confidence behind the wheel. Whether travelling between job sites, towing recreational equipment or heading out on a long-distance drive, this Sierra combines diesel capability with modern comfort and technology.

Explore this 2026 GMC Sierra 1500 SLT Duramax diesel for sale in Petrolia, proudly serving Sarnia, Wyoming, Watford, Alvinston, Oil Springs and communities throughout Lambton County. Contact MacFarlane Chevrolet Buick GMC to schedule your test drive today.