2025 GMC Sierra 3500HD AT4 4x4 | Duramax Diesel | Crew Cab | Summit White
Power, capability, and premium comfort come together in the 2025 GMC Sierra 3500HD AT4 4x4. Built for Alberta drivers who demand serious towing strength and off-road confidence, this heavy-duty truck combines the legendary Duramax 6.6L Turbo-Diesel V8 with AT4 styling and advanced technology.
Key Features:
6.6L Duramax Turbo-Diesel V8 (L5P) B20 diesel compatible, delivering massive torque and towing capability for trailers, campers, and heavy loads.
Allison 10-Speed Automatic Transmission (MGM) Smooth, durable, and optimized for heavy-duty performance.
4-Wheel Drive (4x4) Confident handling in snow, ice, mud, or rugged backroads.
AT4 Preferred & Premium Plus Packages (PDO / PDG) Adds upgraded interior features, tech enhancements, and off-road-ready upgrades.
Crew Cab / Standard Box (4SB) Spacious interior for passengers and practical cargo capacity.
Power Sunroof (CF5) Brings in natural light for a premium driving experience.
Technology Package (CWM) Advanced connectivity, safety, and convenience features.
Jet Black with Kalahari Accents Perforated Leather Seats (HVD) Comfortable and refined cabin for long drives or workdays.
Engine Block Heater (K05) & High Idle Switch (UF3) Ideal for cold Alberta mornings and heavy towing conditions.
Gooseneck / 5th Wheel Prep Package (Z6A) Ready for serious towing and recreational setups.
Summit White Exterior (GAZ) Clean, sharp, and bold for professional and personal use.
Why Buy This Sierra 3500HD?
The 2025 GMC Sierra 3500HD AT4 is engineered for drivers who need unmatched towing, hauling, and off-road capability with refined comfort. From worksite tasks to weekend adventures, this truck offers Duramax diesel performance, advanced technology, and premium AT4 features—all ready for Alberta conditions.
Perfect For:
Towing & hauling • Contractors & trades • Alberta winter driving • Long-distance heavy-duty use • Off-road adventures