New GMC Sierra 3500HD Heavy-Duty Trucks for Sale in Kamloops, BC

The GMC Sierra 3500HD exists for one reason. It takes everything the 2500HD can do and pushes it further. This is the truck for buyers who already know the limits of a three-quarter-ton model. The difference is not about power. Both trucks use the same engine. The real change comes from how the 3500HD handles weight. That becomes obvious once you look at towing figures and payload ratings.

The key decision is not just the trim level. It is a configuration. The GMC Sierra 3500HD introduces dual-rear-wheel setups, which change how the truck behaves under load. Stability improves, especially when towing large fifth-wheel trailers. The lineup follows the same structure as the 2500HD, but capability increases as you move into the right configurations. Pro covers the work-focused end, AT4 adds off-road hardware, and Denali brings a more refined version of the same heavy-duty platform.

Popular GMC Sierra 3500HD Trim Levels

The GMC Sierra 3500HD lineup runs from Pro through to Denali Ultimate, but the structure is easy to follow. Lower trims focus on work use, while higher trims introduce more comfort and technology. The biggest difference sits outside the trim ladder. Configuration matters more than trim, especially when dual-rear-wheel configurations are involved. That is what unlocks the truck’s highest towing and payload capability.

• Pro: The Pro is the entry-level model and focuses on durability and functionality. It uses 17-inch steel wheels and black exterior trim. Vinyl or cloth seating is available, with a bench seat common. The 13.4-inch touchscreen and 12.3-inch driver display are standard. Pro can be configured with single or dual rear wheels, which is critical for heavy towing setups.
• AT4: The AT4 takes the truck in a different direction, focusing on off-road use. It is available only as a Crew Cab with single rear wheels. It adds 18-inch wheels with all-terrain tires, skid plates, and off-road suspension tuning. Interior trim is specific to AT4, with contrast stitching and upgraded materials. It retains higher capability than a 2500HD AT4.
• Denali: The Denali sits at the premium end of the range and adds a full luxury specification. It uses 20-inch machined aluminum wheels and a signature chrome grille. Inside, perforated leather seating, wood trim, and aluminum accents are standard. Heated and ventilated seats and a Bose audio system are included. Denali can be configured with dual rear wheels and a long bed for maximum towing setups.
• Other Trim Levels: SLE and SLT fill the gap between Pro and Denali with more comfort and technology. AT4X builds on AT4 with more advanced off-road hardware. Denali Ultimate adds further interior detail and the highest level of equipment in the lineup.

GMC Sierra 3500HD Key Features

The GMC Sierra 3500HD is defined by how much weight it can carry and control. Engine output stays the same as the 2500HD, but the chassis is built to handle more. Dual-rear-wheel setups, heavier suspension, and a stronger rear axle all contribute to that increase. The result is a truck that can tow larger trailers and carry heavier loads with greater stability. Technology supports that capability, especially when towing.

• Engine and Fuel Economy: The standard engine is a 6.6-litre V-8 producing 401 horsepower and 464 lb.-ft. of torque. An available 6.6-litre Duramax turbo-diesel V-8 produces 470 horsepower and 975 lb.-ft. of torque. Both engines use a 10-speed Allison automatic transmission. Rear-wheel drive is standard, and four-wheel drive is available or standard on higher trims.
• Towing Capacity and Bed Size: The maximum towing capacity is 14,261 kg with fifth-wheel or gooseneck setups. Some configurations support even higher towing figures. Dual-rear-wheel models offer a wider rear track, improving stability under heavy loads. Payload increases beyond 1,800 kg and further in dual-rear-wheel setups. The GMC Sierra offers a standard bed length of 2,069 mm and a long bed length of 2,438 mm. Dual-rear-wheel configurations are paired with the long bed to support large trailer setups.
• Technology and Connectivity: Every GMC Sierra 3500HD includes a 13.4-inch infotainment touchscreen and a 12.3-inch digital driver display. Wireless Apple CarPlay and Android Auto are standard. Google built-in is available on higher trims. A 15-inch Head-Up Display is available. The ProGrade Trailering System supports up to 14 camera views, including transparent trailer views.
• Cab Size, Seating, and Safety: The GMC Sierra 3500HD is available in Regular Cab, Double Cab, and Crew Cab configurations. Seating ranges from 3 to 6, depending on the layout. Crew Cab rear legroom reaches 1,102 mm, which provides full adult space. Double Cab rear legroom is 894 mm. Standard safety features include Forward Collision Alert, Automatic Emergency Braking, and Lane Departure Warning.

Tips for Purchasing a New GMC Sierra 3500HD Heavy-Duty Pickup Truck

Choosing a new GMC Sierra 3500HD at Wheaton Buick GMC in Kamloops, British Columbia, is about more than the vehicle—it’s about feeling supported by a dealership that puts your needs first. Our knowledgeable team is proud to deliver a welcoming, transparent experience for buyers from across southern British Columbia.

• Why Buy Here? At Wheaton Buick GMC, we keep it simple, honest, and stress-free. We focus on building long-term relationships by providing knowledgeable advice and reliable service in our welcoming, family-friendly atmosphere. Our staff works with you to find the right GMC Sierra 3500HD for your needs. Our commitment to satisfaction is reflected in everything we do—from product demonstrations to personalized aftercare.
• Warranty and Protection: All our new vehicles come with comprehensive manufacturer warranty coverage, providing peace of mind for years to come. You can also enhance your protection with GM Protection Plans, prepaid maintenance, or tire and appearance care packages. We’re happy to walk you through all warranty and service options, so you know exactly how you’re covered.
• Test Drive: Arranging a test drive at Wheaton Buick GMC is convenient and straightforward, whether you book online, call in, or drop by our dealership. Our team will explain key features, let you experience the newest models for yourself, and answer all of your questions. This ensures you’re confident in your decision.
• Financing and Leasing: We offer a range of flexible financing and leasing solutions from a dozen different lenders, tailored for drivers in Kamloops and beyond. Whether you have impeccable credit or have stumbled in the past, our financial services team is here to help. From quick pre-approvals to competitive rates and customizable contracts, our finance department works with you to find the payment plan that fits your budget. Enjoy a smooth, transparent experience as you drive away in your new GMC Sierra 3500HD.