Discover the latest lineup of new GMC trucks and SUVs at Red Rock GMC. From the rugged Sierra to the versatile Acadia and luxurious Yukon, you'll find Professional Grade capability, advanced technology, and exceptional comfort in every model. Our team is here to help you find the right GMC with a straightforward, hassle-free buying experience.

- Duramax 6.6L V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque
- 10-Speed Automatic transmission with 4WD and 2-Speed Active Transfer Case
- AT4 Premium Plus Package with power sunroof and Technology Package
- Gooseneck/5th Wheel Prep Package for heavy towing applications
- Spray-on pickup bedliner with GMC logo and rear wheelhouse liners
- 20" high gloss black 8-spoke aluminum wheels
- Multicolor 15" diagonal Head-Up Display with GMC Premium 13.4" information display
- Premium Bose 7-speaker sound system with SiriusXM 360L and wireless phone projection
- Heated and ventilated leather front seats with 10-way power adjustment and lumbar support
- All-weather floor liners with AT4 logo throughout
- Power-retractable black assist steps with LED lighting
- Automatic Emergency Braking, lane departure warning, and forward collision alert
- HD Surround Vision with bed view camera and trailer camera provisions
- Wireless charging, heated steering wheel, and auto-dimming mirrors
- Remote vehicle starter system and keyless open and start

This 2026 Sierra 3500HD AT4 delivers the rugged capability and premium features you need for serious work or weekend adventures. The Duramax diesel engine pairs impressive torque with the reliability professionals depend on, while the advanced suspension and transfer case handle challenging terrain with confidence. The AT4 Premium Plus Package elevates your experience with a power sunroof, cutting-edge technology integration, and refined interior appointments that balance durability with comfort.

The cabin reflects GMC's commitment to quality, featuring perforated leather seating, heated and ventilated front seats, and thoughtful storage solutions throughout. The premium Bose audio system and 15-inch Head-Up Display keep you connected and informed, while the Technology Package provides seamless smartphone integration through wireless projection. Safety features including HD Surround Vision, automatic emergency braking, and multiple camera systems work together to support confident driving in any situation.

The Gooseneck/5th Wheel Prep Package provides the foundation for serious towing needs, with a hitch platform and bed-mounted harness ready for your equipment. The spray-on bedliner protects your cargo area, while the power-retractable steps and LED lighting add practical convenience for daily use. Whether you're managing a commercial operation, towing heavy loads, or simply demanding the best in capability and comfort, this Sierra 3500HD delivers.

The exterior reflects the AT4's off-road heritage with the gloss black header and grille inserts, 20-inch black aluminum wheels, and winter grille cover. Deep-tinted glass and the power sliding rear window with defogger enhance functionality and visibility. These details combine with the professional-grade engineering underneath to create a truck that performs as impressively as it looks.

We invite you to experience this Sierra 3500HD firsthand. Our team can walk you through its capabilities, answer your questions, and help you understand how it fits your needs. Visit our showroom to sit behind the wheel and discover why the Sierra 3500HD AT4 stands as the choice for those who demand real capability backed by genuine quality.

Select Shield includes a 3-month or 3,000-mile limited warranty on select vehicles, valid in all 50 states. New vehicles receive coverage beginning after the manufacturer's basic warranty ends. Excludes as-is, tax, tow, salvage, or lemon law v