2026 GMC Sierra 3500 HD for Sale at Bob Moore Buick GMC

GMC’s most powerful pickup truck returns to Bob Moore Buick GMC for 2026, boasting some of the most luxurious cabins and most potent powertrains the brand has ever produced. The Sierra 3500 is the pinnacle of GMC engineering, offering a wide range of configurations, including three cabs, two bed lengths, and a variety of trim levels. The Sierra HD is notorious for delivering some of the plushest cabins in the industry, even outclassing some luxury SUVs. While the brand places a premium on delivering features, that doesn’t mean they shirk from everyday towing power. The 3500 is a massive pickup truck with all sorts of industrial capability, especially when equipped with an extra set of wheels in the rear. We’ll preview everything you need to know about the new GMC Sierra Heavy Duty pickup truck, from the trim levels to the towing capacity. Find your 2026 GMC Sierra 3500 HD for sale in OKC with Bob Moore GMC.

2026 GMC Sierra 3500 HD Towing Capacity and Performance

All Heavy Duty Sierra trucks come with your choice of powertrain. The base model gets a 6.6-liter gas V-8 that makes 401 horsepower and 464 lb-ft of torque. The most powerful option is the Duramax turbocharged 6.6-liter diesel V-8, which produces 470 horsepower and 975 lb-ft of torque. Either way you go, the Sierra 3500 gets a 10-speed automatic transmission and your choice of RWD or AWD. With the right spec, the Sierra 3500 can tow up to 36,000 lbs. With that sort of power, the only folks who really make full use of the 2026 Sierra are in construction or working with heavy-duty machinery. Bob Moore GMC can help your business purchase a single work truck or a fleet of Heavy Duty GMC trucks. Visit our GMC dealer in OKC to learn more. 

2026 Sierra HD Trim Levels and Features

The Sierra HD has three cabs: a Regular Cab, Double Cab, or Crew Cab. The two-door cabs pair with a long bed that’s 8’2”. Four-door cabs get a standard bed that sits at 6’10”. The 3500 is the only Sierra model to offer a DRW setup. For 2026, the Sierra Heavy Duty 3500 comes in six trim levels:

At the bottom of the lineup, you’ll find some of the more basic work trucks, forgoing some of the everyday creature comforts you might expect on a pickup truck to deliver max towing power at a price that won’t break the bank. The AT4 is more off-road-oriented, with skid plates, off-road tires, and a range of extra features. Of course, the Denali and Denali Ultimate steer towards more luxury features and deliver everything from heated and ventilated seats to rich leather throughout the cabin. If you’d like to learn more about the features and amenities across the Sierra 3500 lineup, visit our GMC dealer in OKC.

New Sierra 3500 Technology

We’ll start with the infotainment system in the Sierra 3500, which comes in three different flavors. Base models get a 7- or 8-inch display, while the more luxurious cabins get a 13.4-inch display. The larger display benefits from the Google Built-in platform, but no matter which infotainment screen you get, the Sierra 3500 comes standard with wireless Apple CarPlay and Android Auto. Most models also pair the infotainment display with a 12.3-inch digital gauge cluster as well. You’ll find a range of driver assistance technology on display in the Sierra 3500, with standard features like automatic high-beams, automated emergency braking, and lane departure warnings. Features such as blind-spot monitoring and adaptive cruise control can also be added. 

Test Drive the 2026 GMC Sierra 3500 HD for Sale in Oklahoma City

The new GMC Sierra 3500 HD does it all, delivering luxury and power in a single frame. If you’d like to see why the GMC brand stands out from the rest, visit our OKC GMC dealership today.