2026 GMC Sierra 2500 HD for Sale in OKC | Bob Moore GMC

Looking for a bit more industrial power than the base GMC Sierra 1500 can provide? Try the GMC Sierra 2500 instead, offering a reinforced steel frame that delivers tons of everyday towing power. The Sierra 2500 delivers as both a basic everyday work truck and a luxury pickup, making it a favorite among casual everyday haulers and industries across Oklahoma. Trim levels like the Denali are legendary for features and technology that outclass luxury SUVs, while the Heavy Duty Sierra comes with gas or diesel powertrains that deliver the raw power you need to get the job done right. The Sierra HD only gets better with age, too, with the MultiPro tailgate and additional driver-assistance technology. In our breakdown below, we’ll preview everything you need to know about the new Sierra 2500 HD, from the driver assistance suite to the towing capacity. If you’d like to learn more about the GMC Sierra HD, visit our GMC dealership in OKC today.

 

2026 GMC Sierra HD Towing Capacity and Specs

The base GMC Sierra 2500 HD comes with a 6.6-liter V-8 that makes 401 horsepower and 464 lb-ft of torque. While the base gas engine is plenty capable, the star of the show is the turbocharged 6.6-liter diesel V-8, which makes 470 horsepower and 975 lb-ft of torque. Both pair with a 10-speed automatic transmission and are available with RWD or AWD. The strongest 2500 HD can tow 22,500 lbs, which is overkill for personal use but perfect for contractors or industrial use. While the Sierra HD is a huge truck, critics have noted that it handles agilely despite its size, making it a bit easier to maneuver in tight spots. If you’d like to learn more about the new GMC Heavy Duty pickup truck, visit our GMC dealership in OKC today.

 

New Sierra 2500 Trim Levels and Features

The Heavy Duty Sierra comes with your choice of a regular cab, double cab, or crew cab. The standard bed pairs with the four-door cabins, and a long bed accompanies the two-door options. The standard bed is about 6’10” and the long bed is about 8’2”. Sierra’s Heavy Duty lineup includes seven trim levels: 

 

Trim Level:	MSRP:
2026 GMC Sierra HD 2500 Pro	$46,700
2026 GMC Sierra HD 2500 SLE	$53,500
2026 GMC Sierra HD 2500 SLT	$64,700
2026 GMC Sierra HD 2500 AT4	$71,600
2026 GMC Sierra HD 2500 AT4X	$83,700
2026 GMC Sierra HD 2500 Denali	$75,000
2026 GMC Sierra HD 2500 Denali Ultimate	$93,800

 

Towards the bottom of the lineup, you’ll find the Pro is a bit more Spartan, offering that classic work truck aesthetic that’s lighter on features while delivering value for folks who plan to max out its towing ability. The STL adds creature comforts you expect from an everyday truck, including heated seats with lumbar support and a heated steering wheel. The AT4 and ATX continue to add luxury amenities while focusing on a more off-road experience with beefier tires and an off-road suspension. Of course, the Denali exists to provide the ultimate luxury experience. If you’d like to learn more about the trim levels at Bob Moore GMC, visit our dealership in OKC today.

2026 Sierra HD Technology Suite

Technology aboard the Sierra 2500 starts with an infotainment touchscreen up front. Entry-level models get either a 7-inch or 8-inch display, while the more luxury-focused options get a 13.4-inch display instead. The larger display gets Google Built-in, but all displays come standard with Apple CarPlay and Android Auto as well. Most models also come standard with a 12.3-inch digital gauge cluster nestled behind the steering wheel. Driver assistance technology includes automated emergency braking, lane departure warnings, and automatic high-beams, but optional features like blind-spot monitoring and adaptive cruise control are also available. 

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

If you’re looking for a mix of style, performance, and luxury, you won’t find much better than the 2026 GMC Sierra 2500 Heavy Duty. Visit our OKC GMC dealer to explore our GMC trucks for sale today!