sierra hd features


When you pair the available Allison® 10-speed automatic transmission with the available 6.6L Duramax® Turbo-Diesel V8 engine, you can tow with absolute command and control.

GMC 2021 Sierra 3500 HD


Integrated into the Infotainment screen, the different available camera views let you easily keep tabs on your truck and trailer while the in-vehicle Trailering App provides a Trailer Light Sequence Test, an available Trailer Tire Pressure and Temperature Monitoring System and more.

GMC 2021 Sierra 3500 HD


The roll-formed high-strength steel bed with available durable spray-on bedliner features 12 cargo tie-downs & offers best-in-class heavy-duty cargo bed volume of 69.6–83.5 cu. ft.

GMC 2021 Sierra 3500 HD


The spacious Crew Cab interior cabin features premium materials with class-leading 43" of front head room and 44.5" of front leg room.

GMC 2021 Sierra 3500 HD

Baton Rouge, Louisiana

The best place to find your perfect ride.

The 2021 GMC Sierra 3500 Heavy Duty is an extreme, durable, and maneuverable vehicle that brings quality and consistency to the markets of Baton Rouge, LA and surrounding areas and can bring amazing benefits to everyday families of Louisiana.

With its off-road and rugged capability, it’s incredible hauling capacity, as well as its state-of-the art security and technology features, the Sierra 3500 Heavy Duty is the car that can bring benefits to all members of the family.

GMC 2021 Sierra 3500 HD

powerful presence

The Exterior

The GMC Sierra 3500 Heavy Duty comes with a rugged, steel bed that has 12 cargo tie-downs and best-in class volume, as well as an incredibly sleek paint job designed to last, mirrors tailored for towing, a truck bed step, running lamps, roof lamps, and wheel arch lamps on some models.

These features make this truck not only one of the sleekest on the market for design and appearance, but also gives it incredible functionality with the increased hauling capacity as well as the side bed step and lighting features.

GMC 2021 Sierra 3500 HD



The GMC Sierra 3500 Heavy-Duty’s incredible performance comes paired with a luxurious, state-of-the-art interior that can come with heated leather seats and a heated leather steering wheel, as well as rear outlets and climate control which can be handy for the entire family. Many in the Baton Rouge, LA area have large, extended families, and the GMC Sierra 3500 Heavy Duty can be an incredible helper for all types of events and occasions, as well as an asset for every member of the family with incredible space for everyone, as well as immaculate comfort and luxury.

GMC 2021 Sierra 3500 HD


Advanced Technology


With 15 different camera views, including a truck bed view, the Sierra 3500 Heavy Duty is loaded with extra tech to help keep you safe and focused while driving. This includes a heads-up display system that can project information directly onto the windshield such as speed, navigation, audio and phone information.


Some other features include cruise control and low fuel, as well as much more. Another key technology feature is the available rear camera mirror and HD surround vision, which can give you an incredible view of all areas around the truck, providing added safety to you, your surroundings, and your loved ones in the truck with you.


GMC 2021 Sierra 3500 HD

Powerfully Efficient

The Performance

Residents of Baton Rouge, LA and the surrounding areas know how bad the weather down here can get, especially in the winter and spring months; floods can take out whole areas of wilderness, mud can sink vehicles up to the doors or more and rain can wash away whole dirt roads at times.

That’s why the Sierra 3500 Heavy Duty is built to tolerate the most extreme conditions, with an incredibly large drive shaft for driving and towing in rugged conditions, as well as an incredible 6.6L Duramax Turbo-Diesel V8 Engine. It has an incredible payload of up to 6,600lbs and a towing capacity of over 16,000lbs, as well as independent front suspension for driving in rough terrain.

GMC 2021 Sierra 3500 HD


The Safety

With a built-in trailering system designed to help in the trailering process, a jackknife alert system, rear trailer view and a hitch guidance camera, the GMC 3500 Heavy Duty is made for ease and adaptability when it comes to towing technology.

With a Kicker audio system and impeccable connectivity, this truck is built for all your family and friends and entertainment needs and can easily include a subscription to SiriusXM 360L with over 200 Channels of media. The GMC Sierra is designed to keep you and your family on the road safely and in comfort.

GMC 2021 Sierra 3500 HD

lane change alert

Lane change alert can provide side-mirror visual alerts when a detected moving vehicle is quickly approaching or is in your side blind zone. Available on base Sierra HD, SLE, SLT and AT4. Standard on Denali.

GMC 2021 Sierra 3500 HD

following distance indicator

Displays the gap time in seconds between your vehicle and a detected vehicle you’re following. This can help you decide if you’re following much too closely.

GMC 2021 Sierra 3500 HD

rear cross traffic alert

Rear cross alert can alert you to detected left- or right-cross traffic behind you when in Reverse. Available on Sierra HD, SLE, SLT, and AT4. Standard on Denali.

GMC 2021 Sierra 3500 HD

forward collision alert

It can warn you if it detects a potential front-end collision with a vehicle you're following so you can quickly take action. The system can also provide a tailgating alert if you are following a vehicle much too closely.

GMC 2021 Sierra 3500 HD

automatic emergency braking

It works with Forward Collision Alert to help you avoid or reduce the severity of a front-end collision with a detected vehicle you are following. This feature works at speeds below 50 MPH.

GMC 2021 Sierra 3500 HD


Front and Rear Park Assist provides distance alerts to nearby detected objects to help you park and avoid objects at low speeds. Available on base Sierra HD, SLE, SLT and AT4. Standard on Denali.

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