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Available in two lineups, the 2025 GMC Sierra HD is a great choice for heavy-duty work and even heavier play. Its powerful powertrains, versatile configurations, and luxurious comfort are just some of the features drivers love about it. 5 Reasons Drivers Love the 2025 GMC Sierra HD Versatile Configurations With various trim levels offered in different cab and bed configurations, customizing your pickup truck has never been easier. A three-seat regular cab with a long bed is available on the Pro and SLE trim levels, offering a cargo capacity of 83.5 cubic feet. The six-seat double and crew cab styles pair with either a long or a standard bed that boasts a cargo capacity of 69.5 cubic feet. Like the regular cab, the double cab is available on the Pro and SLE models, while the crew cab is compatible with all trims. Massive Power Ready to tackle all heavy-duty tasks, the 2025 GMC Sierra HD comes standard with a 6.6L V8 gas engine and a 10-speed Allison automatic transmission. This powertrain produces 401 horsepower and 464 lb-ft of torque, offering a maximum payload capacity of 3,907 lbs in the 2500 HD Pro model and 4,721 lbs in the 3500 HD Pro trim. An available 6.6L V8 turbo-diesel engine produces up to 975 lb-ft of torque for a towing capacity of up to 36,000 lbs. Driver-Centric Cabin Made for heavy-duty work, the new GMC Sierra HD boasts a practical cabin designed with utility and convenience in mind. Whether you opt for the regular cab or the crew cab model, the interior comes standard with cool-looking vinyl seating surfaces and vinyl floors, meaning you can clean the truck easily. Console, dashboard, and steering wheel controls make it easy to operate the truck or access infotainment functions without distractions. Premium materials, including cloth and leather, are available or standard on the higher trims. The base 40/20/40 front bench boasts convenient under-seat storage, while the rear seats fold flat, making room for more cargo. For enhanced comfort, you can customize the six-seat cabins with front bucket seats. Smart Tech Each GMC Sierra HD model boasts a suite of convenience technologies, including hitch guidance and a trailering information label that provides max trailering ratings for conventional, 5th-wheel, and gooseneck towing as well as the tongue weight. GMC's in-vehicle trailering app is available on all but the base trim. Driver Assistance From the Sierra HD Pro Safety Package to the OnStar services and Teen Driver assistance, the new Sierra HD is packed with driver assistance technologies. For added peace of mind behind the wheel, this truck comes standard with a range of anti-collision, blind-spot monitoring, and lane-management systems. To test all these features yourself, visit us at Wiesner of Huntsville in Huntsville, TX to take the 2025 GMC Sierra HD for a spin.

The GMC Sierra lineup offers three different pickup trucks, each with unique features and varying degrees of performance. The 2025 GMC Sierra 2500 HD is a heavy-duty pickup that has powerful engine options, major towing capabilities, and convenient interior features. 7 Reasons to Test Drive the 2025 GMC Sierra 2500 HD 1. 6.6L V8 Gas Engine The GMC Sierra 2500 comes with a 6.6L V8 gas engine that offers 401 horsepower at 5200 rpm and 464 lb.-ft. of torque at 4000 rpm. For increased power and a maximum towing capacity of 21,870 pounds, there's an available 6.6L Duramax Turbo-Diesel engine. This engine boasts 470 horsepower at 2800 rpm and 975 lb.-ft. of torque at 1600 rpm. 2. Allison 10-Speed Automatic Transmission Both of the GMC Sierra 2500's engine options are paired with an Allison 10-speed automatic transmission for optimal performance. This transmission is electronically controlled with overdrive and includes auto-grade braking. With Tow/Haul mode, your Allison automatic transmission can reduce shift cycling for better control and improved cooling during the towing process. 3. Sierra HD Pro Safety Trucks in the GMC Sierra lineup come with their own exclusive safety package, Sierra HD Pro Safety. The Sierra HD Pro Safety package includes Forward Collision Alert, Following Distance Indicator, Front Pedestrian Braking, IntelliBeam, and more. These functions use cameras and movement sensors to watch your surroundings for possible hazards and warn you before an accident happens. 4. GMC MultiPro Tailgate If you're going to be using your GMC Sierra for hauling projects, you'll love the convenience of the GMC MultiPro tailgate. This available tailgate has six different configurations that make loading, unloading, and hauling cargo easier. This includes a built-in step for climbing up into your truck bed and a tailgate extension for hauling long items like lumber. 5. GMC Premium Infotainment with Google Built-In The SLE and all higher GMC Sierra 2500 trims ​come with a 13.4-inch GMC Premium Infotainment system with Google built-in. This system includes wireless smartphone integration through Apple CarPlay and Android Auto, Bluetooth streaming audio, AM/FM radio, and SiriusXM satellite radio compatibility. With Google built-in, you can use Google Assistant, Maps, Gmail, and more on the in-cabin touchscreen. 6. Trailering Package ​The GMC Sierra 2500 HD comes with a complete Trailering ​Package for all of your towing projects. This package includes a trailering hitch platform, a trailer hitch, a 2.5-inch receiver hitch, a 7-wire electrical harness, and 4-pin and 7-pin connectors. The GMC Trailering Package also comes with Hitch Guidance, which gives you a digital view of your trailer and hitch during the alignment process and while driving. 7. Solar-Absorbing Glass Your GMC Sierra 2500's cabin stays cool and comfortable thanks to its solar-absorbing glass windows. This glass absorbs the sun's solar rays, ​preventing them from heating your ​cabin up. Stop by Wiesner of Hunstville in Huntsville, TX, to test drive the new Sierra 2500 HD!