Meet the 2025 GMC Sierra 2500HD AT4, a heavy-duty truck engineered to deliver both capability and refined comfort. This gray powerhouse combines serious work capacity with premium features designed to make every mile—whether on the job or the open road—a confident experience.- Duramax 6.6L V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque- AT4 Premium Plus Package with power sunroof and Technology Package- Gooseneck/5th Wheel Prep Package for professional towing setup- BF Goodrich off-road tires (LT275/65R20) for enhanced grip and durability- Power-retractable assist steps with LED lighting- Spray-on pickup bedliner with GMC logo- HD Surround Vision and Bed View Camera with trailer provisions- Bose Premium 7-Speaker sound system with SiriusXM 360L trial subscription- Wireless phone projection and Apple CarPlay/Android Auto compatibility- Heated and ventilated front seats with heated steering wheel- Remote vehicle starter system and push-button start- Multicolor 15-inch head-up display with trailer side blind zone alert- Hill descent control and 2-speed active transfer case for off-road confidence- 120-volt bed and instrument panel power outlets- All-weather floor liners for first and second rowsThe heart of this truck is its Duramax diesel engine—a proven workhorse that delivers substantial torque for towing and hauling. Paired with a 10-speed automatic transmission and four-wheel drive, this Sierra handles demanding terrain and heavy loads with authority. The 220-amp alternator and engine block heater ensure reliable performance in challenging conditions.The AT4 Premium Plus Package elevates your experience with a power sunroof, advanced technology features, and the high-clearance step that defines the AT4 heritage. The included gooseneck hitch platform with bed-mounted 7-pin trailer harness prepares this truck for professional applications. Whether you're managing a job site or connecting a fifth wheel, this truck is ready.Inside, the cabin reflects GMC's commitment to quality and function. Premium leather-appointed front seats offer heating and ventilation, while the 10-way power driver seat with lumbar adjustment ensures comfort during long hours behind the wheel. The automatic temperature control with dual-zone operation keeps everyone satisfied. The Bose sound system, wireless charging, and multiple USB ports integrate seamlessly into your mobile lifestyle.Safety and visibility are prioritized throughout. The HD Surround Vision system, ultrasonic front and rear park assist, and rear cross traffic alert give you complete awareness of your surroundings. Automatic emergency braking, forward collision alert, and front pedestrian braking work alongside electronic stability control to help keep you safe. The inside rearview auto-dimming rear camera mirror and trailer side blind zone alert technology provide additional confidence.Drive with conviction. The 2025 GMC Sierra 2500HD AT4 combines diesel power, premium comfort, and thoughtful capability in a truck built for those who expect more. Visit our showroom to experience this truck firsthand and discover why serious professionals choose serious trucks.
