The GMC Sierra HD handles big jobs and rugged adventures with ease — while showing off super-stylish looks and premium features wherever you go. For 2024, the Sierra HD is more capable and better equipped than ever before, making it the perfect choice for all your heavy-duty truck needs in West Texas.

Huge capabilities

You’ll have two major choices to make when you buy a 2024 Sierra HD. First, you’ll need to decide between a pair of beastly powertrains. The standard 6.6-liter V8 puts out 401 horsepower and 464 lb-ft of torque, while the available 6.6-liter V8 turbo-diesel delivers an upgraded 470 horsepower and 975 lb-ft of torque. Both of these engines connect to an advanced Allison® 10-speed automatic transmission.

Second, you’ll need to choose between a 2500HD and a 3500HD model. The 2500HD can tow up to 22,500 pounds or handle a payload of up to 3,850 pounds. Available with a dual rear-wheel design, the larger 3500HD can pull a max of 36,000 pounds when properly equipped or haul up to 7,290 pounds.

Advanced towing tech

The Sierra HD offers a multitude of cutting-edge tech tools to help you maximize its towing capabilities. The available ProGrade™ Trailering System provides an in-vehicle trailering app and Hitch Guidance with Hitch View to help you tow with confidence. Overall, the Sierra HD offers as many as 14 camera views to help you maneuver your trailer. New for 2024, you can opt for a Trailer Side Blind Zone Alert system, an Adaptive Cruise Control system that’s compatible with trailering, and an enhanced Transparent Trailer camera view.

Standard safety and driver assistance

All 2024 Sierra HD trim levels come equipped with the Pro Safety package, which helps you avoid crashes and stay focused with features like Forward Collision Alert, Automatic Emergency Braking, Front Pedestrian Braking, and Lane Departure Warning. Rear Cross Traffic Alert, Lane Change Alert with Side Blind Zone Alert, and Rear Park Assist are available as well.

Utility and style for miles

The Sierra HD has an impressive new exterior look for 2024. The grille and front fascia have been redesigned, and you can also choose from a variety of new wheel designs and paint colors. What hasn’t changed is the Sierra HD’s impressive utility. To make work easier, you’ll receive standard features like LED lights, vertical trailering mirrors, and the high-strength steel Durabed with class-leading cargo volume. For even more capability, opt for the innovative MultiPro Tailgate, which can transform into a load stop, a work surface, and more.

A roomy, comfortable ride

Inside the Sierra HD’s spacious cabin, you’ll find redesigned surfaces, refreshed premium materials, and a wealth of available amenities. Deluxe options like a power-adjustable driver’s seat, underseat storage, leather upholstery, and dual-zone automatic climate control provide convenience and comfort on the go. Depending on your needs, you can choose from regular, double, or crew cab configurations. The crew cab is especially family-friendly, with seating for up to six and more than 43 inches of second-row legroom.

Cutting-edge infotainment features

All Sierra HD models come standard with Apple CarPlay® and Android Auto™ smartphone compatibility, allowing you to easily access apps, audio, maps, and more as you travel. On SLE and higher trims, you’ll find a brand-new display system that integrates a 13.4-inch center touch screen, a 12.3-inch digital instrument cluster, and handy Google built-in services like navigation and voice assistance.

New trim levels for 2024

The Sierra HD lineup welcomes a couple of new trim levels for 2024: the AT4X and the Denali Ultimate. The AT4X is GMC’s ultimate off-roader, boasting a factory suspension lift and Multimatic DSSV™ dampers, comprehensive skid-plate protection, and 35-inch Goodyear® Territory mud-terrain tires. The Denali Ultimate takes the already-luxurious Denali trim to an even higher level, showing off Vader chrome accents, 20-inch wheels, and an interior decked out with full-grain leather upholstery and open-pore wood trim.

Get all the details on the new 2024 GMC Sierra HD when you visit our showroom here at Mitchell Buick-GMC in San Angelo, Texas.

2023 GMC SIERRA HD

The 2023 GMC Sierra HD models deliver incomparable capability, power, and durability for hardworking families and pet owners who love exploring the outdoors. The heavy duty lineup consists of the GMC Sierra 2500HD and 3500HD, both offering tremendous capability for your most difficult jobs and most adventurous journeys.

The 2023 GMC Sierra HD offers five trim levels: Pro, SLE, SLT, AT4, and Denali. Three special packages are also available: Denali Black Diamond Edition, Denali Ultimate Package, and the AT4 Premium Plus Package.

Innovative exterior design features

The available GMC MultiPro Tailgate offers unprecedented functionality from the truck’s tailgate. It can be adjusted into six different positions. Settings include primary gate, primary gate load stop, easy access into the bed by folding down the inner gate, full-width step that can withstand 375 pounds, an inner gate load stop, and inner gate with work surface. Available trailering mirrors offer a better view of dangers when you’re trailering. They can fold with power or manual adjustments and feature available upgrades such as LED turn-signal indicators/clearance lamps, LED perimeter lighting, and LED forward auxiliary task lighting.

The cargo bed offers best-in-class volume. It is crafted with roll-formed high-strength steel and features 12 cargo tie-downs. LED lighting offers essential illumination when you’re working. Getting into the truck bed is easier with the CornerStep Rear Bumper.

Engine options

You have a choice between two engines to power either the Sierra 2500HD or 3500HD. The 6.6-liter V8 gasoline engine pairs to a six-speed automatic transmission. It generates 401 horsepower and 464 lb-ft of torque. The 6.6-liter V8 Turbo Diesel engine pairs to an Allison® 10-speed automatic transmission. This powertrain generates 445 horsepower and 910 lb-ft of torque.

When properly equipped the 2023 GMC Sierra HD 3500HD has a maximum towing capacity of 36,000 pounds and a maximum payload capacity of 7,442 pounds.

Interior features

Although the 2023 GMC Sierra HD models are all about rugged capability, power, and durability, they don’t skimp on creature comforts to make every drive the best it can be. Available comfort features include a heated steering wheel, heated and ventilated front leather-appointed seats, and an HVAC system with dual-zone climate control and rear-seat outlets. Storage is a premium feature in the Sierra HD models with available rear seatback storage and storage under the seat of the rear-folding split bench. The center console is spacious and has plenty of room to hold your essentials close by.

Modern connectivity tech

The 2023 GMC Sierra HD will have you connected to clients, family, friends, and your favorite content with its user-friendly infotainment system. It offers smartphone integration and an available wireless charging pad to keep your compatible devices ready to go.

The available Bose® Premium Sound System uses seven speakers. A Richbass woofer supports the high quality sound production flowing through the cabin.

Advanced safety features

Since the 2023 GMC Sierra HD models are designed for trailering and towing, they make the process more straightforward with impressive technologies. With up to 15 available camera views, you’ll be able to monitor what’s near your truck and your trailer for safer movements. Views include the Transparent Trailer View, which essentially erases the trailer so you can see what’s behind it; Hitch View to help you coordinate the trailer attachment; and Inside Trailer View.

Taking your eyes off the road is always dangerous, but especially taxing when you’re behind the wheel of a Heavy Duty truck. The available Head-Up Display is a 15-inch multicolor projection on your windshield that offers you a clear line of sight to your vehicle’s warning, speed, alerts, and available navigation assistance. It’s a first-in-class feature sure to revolutionize the way you drive.

Test drive the 2023 GMC Sierra HD at Mitchell Buick-GMC in San Angelo, Texas.