2026 GMC Sierra 2500 HD AT4

Drivers in Lakeland, Polk County, and across Central Florida choose the Regal Automotive Group for a wide selection of new vehicles and a dealership experience built around convenience and transparency. With multiple locations in Lakeland, Regal makes it easy to find the right vehicle to fit your lifestyle.

- Duramax 6.6L V8 Turbodiesel with 470 hp and 975 lb-ft of torque
- AT4 Premium Plus Package with power sunroof and technology features
- Gooseneck/5th Wheel Prep Package with hitch platform
- Power-retractable assist steps with LED lighting
- 22" high gloss black aluminum wheels with machined accents
- Bed-mounted MultiPro Tailgate Audio System by Kicker
- HD Surround Vision with bed view camera and trailer camera provisions
- Premium Bose audio system with SiriusXM 360L trial subscription
- Front and rear premium floor liners with removable carpet inserts
- Heated and ventilated leather front seats with 10-way power adjustment
- Automatic emergency braking with forward collision alert
- Lane departure warning and rear cross traffic alert
- Wireless charging and Apple CarPlay/Android Auto integration
- Off-road high clearance step with hill descent control
- Power sunroof and multicolor 15" head-up display

This 2026 GMC Sierra 2500HD AT4 arrives in eye-catching silver with premium features designed for those who demand capability and refinement. The Duramax diesel powerplant delivers exceptional torque for towing and hauling, backed by a 10-speed automatic transmission and 4WD system engineered for both highway comfort and off-road performance. Every detail reflects the AT4 designation, from the aggressive styling with black badging to the functional off-road suspension that handles terrain with authority.

The cabin merits particular attention. Perforated leather seats feature both heating and ventilation, with the driver's seat offering 10-way power adjustment and lumbar support. A power sunroof floods the interior with natural light, while the premium GMC infotainment system delivers seamless smartphone integration through wireless CarPlay and Android Auto. The multicolor head-up display keeps critical information in your line of sight, and onboard Bose premium audio paired with the MultiPro Tailgate Audio System ensures excellent sound quality whether you're commuting or camping.

Technology and safety work together throughout this truck. Automatic emergency braking with forward collision alert, lane departure warning, and trailer side blind zone alert keep you protected on every journey. The bed view camera combines with trailer camera provisions and hitch guidance to simplify backing up with cargo. Ultrasonic park assist eliminates guesswork when maneuvering in tight spaces.

The AT4 package emphasizes genuine off-road capability. The gooseneck/5th wheel prep package includes a dedicated hitch platform with stamped bed holes and a 7-pin trailer harness, making it ready for serious towing applications. Hill descent control helps manage steep descents, while the 2-speed active transfer case provides flexibility for varied terrain. All-terrain 265/60R22 tires and the high-clearance step enhance approach angles and ground clearance.

Practicality extends to every surface. A spray-on bedliner with GMC logo protects the pickup box, while cargo tie-down rings secure your load. Power-retractable assist steps with integrated LED lighting make entry and exit safer and easier. The bed-mounted assist handle provides additional support when climbing into the truck bed. Inside, multiple power outlets and USB ports keep devices charged, and the overhead console organizes small items efficiently.

This Sierra 2500HD AT4 represents GMC's commitment to delivering a truck that works as hard as you do while providing genuine comfort and contemporary technology. Whether your focus is weekend adventures or professional-grade hauling capability, this truc