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.

- Duramax 6.6L V8 Turbodiesel with 470 hp and 975 lb-ft of torque
- 10-Speed Automatic transmission with 4WD
- B20-Diesel compatible engine with integrated block heater
- Bose Premium 7-Speaker Sound System with SiriusXM 360L
- GMC Premium 13.4" Diagonal Information Display
- Sierra HD Pro Safety Plus Package with Automatic Emergency Braking
- HD Surround Vision with Bed View Camera and Trailer Camera Provisions
- Heated and Ventilated Front Seats with 10-Way Power Adjusters
- Adaptive Cruise Control with Lane Departure Warning
- Ultrasonic Front and Rear Park Assist with Hitch Guidance
- Wireless Phone Projection and Wireless Charging
- Remote Vehicle Starter System with Keyless Open and Start
- Chrome surround grille with heated door mirrors
- Auto-dimming rear-view mirror with IntelliBeam high beams
- 2-Speed Active Transfer Case with Exhaust Brake

The 2026 GMC Sierra 3500HD SLT presents a comprehensive heavy-duty truck designed for those who demand capability and comfort. With the legendary Duramax 6.6L turbodiesel engine delivering substantial torque, this truck handles demanding work while maintaining smooth highway manners through its 10-Speed Automatic transmission. The four-wheel-drive system provides confidence across varied terrain and weather conditions.

Safety technology is woven throughout this truck's design. Forward collision alert, automatic emergency braking, rear cross traffic alert, and a comprehensive camera system including trailer provisions give you visibility and awareness in every scenario. The safety alert seat adds an intuitive dimension to your awareness while driving this capable machine.

The SLT trim focuses on practical luxury. Perforated leather-appointed front outboard seats are heated and ventilated, while the heated steering wheel ensures comfort in cold mornings. The 10-way power seat adjusters with lumbar support mean you'll find your ideal driving position for long hauls. Premium audio quality comes from the Bose system, enhanced by the GMC Premium information display that keeps you informed and connected.

Convenience features throughout the cabin demonstrate thoughtful design. Wireless charging and wireless phone projection reduce clutter and distraction. Dual USB ports throughout the interior keep devices powered and ready. The remote vehicle starter system means you can warm the engine before stepping outside, while the keyless entry and push-button start simplify your daily routine.

The truck bed itself is equipped for productivity. The spray-on bedliner with GMC logo provides protection, while LED cargo area lighting illuminates work at any hour. The 120-volt power outlet in the bed supports job site needs, and the power-sliding rear window with defogger enhances versatility and visibility.

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.