2026 GMC Sierra 3500 HD SLT

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
- Spray-on Pickup Bedliner with GMC Logo
- Gooseneck/5th Wheel Prep Package
- Heated and Ventilated Driver and Front Passenger Seats
- HD Surround Vision and Bed View Camera with Trailer Camera Provisions
- Bose Premium 7-Speaker Sound System with SiriusXM
- Adaptive Cruise Control with Forward Collision Alert
- Lane Departure Warning System and Rear Cross Traffic Alert
- Ultrasonic Front and Rear Park Assist
- Wireless Phone Projection and Wireless Charging
- 10-Way Power Driver and Passenger Seats with Lumbar Support
- Premium GMC Infotainment System with 13.4" Diagonal Display
- Remote Vehicle Starter System and Push Button Start
- Automatic High-Beam Headlights with LED Cargo Area Lighting

The 2026 GMC Sierra 3500HD SLT arrives with the legendary Duramax diesel engine, delivering the power and torque needed for heavy-duty work and towing. With 975 lb-ft of torque available from 1600 rpm, this truck handles demanding jobs with confidence. The 10-speed automatic transmission optimizes efficiency and performance across all driving conditions, while 4WD capability provides traction when you need it most.

This Sierra 3500HD is equipped with comprehensive comfort and convenience features designed for the modern truck owner. Heated and ventilated front seats keep you comfortable in any season, while the 10-way power adjustable driver seat with lumbar support ensures long drives remain fatigue-free. The premium GMC Infotainment System features a 13.4-inch diagonal display paired with wireless phone projection, allowing seamless integration with your mobile device.

Technology features enhance both safety and usability on the job site and the road. The HD Surround Vision system and bed view camera with trailer provisions give you complete visibility when maneuvering in tight spaces. Adaptive cruise control, forward collision alert, lane departure warning, and rear cross traffic alert work together to support safer driving. Ultrasonic front and rear park assist takes the guesswork out of parking this full-size truck.

The truck bed is protected with a spray-on bedliner bearing the GMC logo, defending against rust and impact damage. The gooseneck and fifth-wheel prep package is integrated, allowing you to haul serious loads with confidence. Chrome exterior details, including the surround grille and bumpers, complement the gray exterior while presenting a professional appearance.

For drivers who demand capability without compromise, this Sierra 3500HD SLT combines diesel efficiency with substantial hauling capacity. Every system has been engineered to support your work and lifestyle, from the engine block heater for cold-weather reliability to the remote vehicle starter for added convenience.

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.