GMC Sierra HD

Performance

The GMC Sierra HD cranks out 470 horses with a Duramax 6.6L Turbo-Diesel V8 engine. You also get 975 lb.-ft of torque for the strength and capability you want.

Technology

Tech for the GMC Sierra HD is all about being practical and helpful. A prime example is the ProGrade Trailering Tech that assists when hitching up a trailer and towing on the road.

Comfort

After a long workday, you’ll appreciate the comfort found in the GMC Sierra HD. Find the perfect setting for the 16-way power driver seat with massage to relax tired muscles.

What We Like About The New 2025 GMC Sierra HD

Always Practical

The focus for the 2025 GMC Sierra HD is all about being practical with functional amenities, such as LED projector headlamps that enhance visibility after dark. Signature lighting brightens the night and makes it easier for other vehicles to see you. You also find it easier to load the bed and unload with the six-function MultiPro Tailgate. Choose the Best-in-Class front head and leg room to give your passengers more space to stretch out in the Crew Cab. Add a little sophistication with the Alpine Umber interior, leather upholstery, and contrast stitching.

Always Informed

Keep track of your speed, temperature, fuel usage, and more in the 2025 GMC Sierra HD with the 12.3-inch diagonal color Driver Information Center. All this information can be projected onto the windshield with the 15-inch diagonal multicolor Head-Up Display to provide important details without taking your eyes off the road. You also have a 13.4-inch diagonal center touchscreen for all your entertainment, settings, and more. You can customize the data you want to have displayed with your most used apps quickly available.

Always Protected

Advanced safety features give you more peace of mind in the 2025 GMC Sierra HD. For example, Following Distance Indicator helps you stay a safe distance from other vehicles while Forward Collision Alert sends a warning if there’s a possible crash situation coming up. Lane Departure Warning lets you know if you start to drift across a lane marker. You can feel safer in busy traffic situations with Front Pedestrian Braking, which stops the truck if a person walks in front.

Always Capable

Along with the powerful diesel engine, the 2025 GMC Sierra HD offers a 6.6L V8 gas engine. Enjoy smooth handing and precise control with the Allison ten-speed automatic transmission. You can tow a heavy load with your choice of a 2500 model at 21,870 pounds or 36,000 pounds for the 3500. Towing is easier with Adaptive Cruise Control with Trailering, which helps you maintain traffic flow when you’re pulling a trailer behind. You also have Transparent Trailer View for up to 14 camera views that show you all around the trailer and truck.

2025 GMC Sierra HD
FAQs

How Powerful is the 2025 Sierra HD?

The Siera HD is able to tow up to 36,000 pounds when it’s properly equipped.

Which Engine Is Best for Towing?

The available Duramax 6.6L Turbo-Diesel V8 Engine can handle almost anything. It comfortably kicks out up to 975 lb-ft. of torque, so you’ll never have to shy away from a loaded trailer.

Does This Truck Have a Touchscreen?

This truck offers available displays like the 13.4-inch Diagonal Center Touchscreen, the 15-inch Diagonal Multicolor Head-Up Display, and the 12.3-inch Diagonal Color Driver Information Center.

Is This Truck Good for Off-Roading?

This truck is a great choice for off-roading thanks to its durable frame and its capable design. Both the AT4 and the AT4X trims are focused on providing you with the features you need to go anywhere you please.

Is the 2025 Sierra HD a Safe Truck?

This model offers Sierra HD Pro Safety, which includes features like Forward Collision Alert, a Following Distance Indicator, IntelliBeam, and more.

Is the Cabin Comfortable?

Depending on your trim, you might have everything from a Heated Steering Wheel to a Massage Mode for your front seats.

What Is the MultiPro Tailgate?

This is an available tailgate for this model that offers six different functions. It can easily be configured to give you what you need, whether that’s more space for your cargo or a step.

What Kind of Tech Does This Model Offer?

Outside of the displays in your cabin, you can opt for available features like up to 13 camera views. This makes it easy to keep track of your trailer and the cargo in your bed.