Sierra 2500

Spider

AWD4WD

8-Cylinder Turbo

Diesel

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. - 6.6L V8 Diesel Turbocharged (Duramax) with 470 hp and 975 lb-ft of torque - 10-Speed Automatic transmission with 4WD - X31 Off-Road Package with Hill Descent Control and Off-Road Suspension - Gooseneck/5th Wheel Prep Package for serious towing capability - Premium GMC Infotainment System with Apple CarPlay and Android Auto - Bose Premium 7-Speaker Sound System with SiriusXM 360L - HD Surround Vision with Bed View Camera and dual Trailer Cameras - Heated and ventilated leather front seats with 10-way power adjustment - Advanced safety features including Automatic Emergency Braking and Rear Cross Traffic Alert - Black GMC Emblems and Gloss Black Header Grille with premium styling - Spray-on Pickup Bedliner with GMC Logo - Remote Vehicle Starter System with wireless phone projection - Ultrasonic Front and Rear Park Assist with Trailer Side Blind Zone Alert - Wireless charging and multiple USB charging ports throughout - Engine Block Heater and 220-Amp Alternator for reliability The 2026 GMC Sierra 2500HD AT4 is built for those who demand capability without compromise. With the legendary Duramax 6.6L V8 diesel engine delivering an impressive 975 lb-ft of torque, this truck handles heavy loads and challenging terrain with confidence. The 10-speed automatic transmission and 4WD system work together to provide smooth power delivery in any driving condition, while the X31 Off-Road Package ensures you're equipped with advanced suspension and Hill Descent Control for true trail performance. Comfort and technology are equally impressive. The cabin features heated and ventilated leather front seats, dual-zone automatic climate control, and a heated steering wheel for those cold Florida mornings. The Premium GMC Infotainment System integrates Apple CarPlay and Android Auto seamlessly, while the Bose sound system with SiriusXM keeps you connected and entertained on every drive. Safety and convenience are standard here. The HD Surround Vision system, Automatic Emergency Braking, Rear Cross Traffic Alert, and Ultrasonic Park Assist give you complete awareness around the truck. The Bed View Camera with dual Trailer Camera provisions and in-vehicle trailering app make towing straightforward and secure. For those who need to work, the Gooseneck/5th Wheel Prep Package and upfitter switch kit provide professional-grade capability. This truck arrives in a sophisticated gray exterior with black GMC badging and a gloss black grille that commands attention. The 20-inch high-gloss black aluminum wheels and spray-on bedliner with GMC logo complete the AT4 package, while rain-sensing wipers and deep-tinted glass add practical refinement. The 2026 Sierra 2500HD AT4 represents everything GMC engineering has perfected power, luxury, and capability combined. Whether you're managing your business, towing a trailer, or exploring off-road territory, this truck delivers on every level. For nearly 50 years, the Regal Automotive Group has proudly served Lakeland and Polk County drivers. With a large inventory of quality vehicles, competitive pricing, and aggressive financing options, our team is committed to delivering a straightforward buying experience and excellent customer service.

New 2026 GMC Sierra 2500 AT4 AWD/4WD

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