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
- AT4 Premium Plus Package with power sunroof and Technology Package
- Gooseneck/5th Wheel Prep Package with hitch platform and bed-mounted harness
- Off-Road High Clearance step and 2-Speed Active Transfer Case
- HD Surround Vision with Bed View Camera and dual trailer camera provisions
- Multicolor 15" Diagonal Head-Up Display with GMC Premium 13.4" Information Display
- Heated and ventilated leather front seats with 10-way power adjusters
- Bose Premium 7-Speaker Sound System with SiriusXM 360L
- Power sunroof and power-retractable assist steps with LED lighting
- Wireless charging and wireless phone projection capabilities
- All-weather floor liners with AT4 logo
- Spray-on pickup bedliner with GMC logo
- 20" High Gloss Black aluminum wheels
- Rear wheelhouse liners and winter grille cover

The 2026 GMC Sierra 3500HD AT4 delivers serious capability wrapped in refined construction. Built on a diesel platform, this truck handles demanding jobs without compromise. The Duramax engine produces substantial torque for towing and hauling, while the available 4WD system provides confident off-road performance and winter traction.

Your cab welcomes you with premium materials and thoughtful design. Perforated leather seats heat and cool, adjusting ten ways with lumbar support. The heated steering wheel and premium Bose audio system create an environment where long drives feel less like work and more like command center operation. Wireless device charging keeps your technology powered throughout the day.

Advanced vision systems work on your behalf. The surround-view camera with trailer provisions gives you confidence when maneuvering in tight spaces or backing equipment. The head-up display keeps critical information in your line of sight without distraction. Forward collision alert and automatic emergency braking add layers of protection during daily driving.

The AT4 trim emphasizes capable design details. Gloss black accents frame the grille, while LED cargo lighting illuminates your work area after sunset. Power-retractable assist steps with integrated lighting make climbing into the cab easier, regardless of terrain conditions. The spray-on bedliner protects against daily wear while displaying the AT4 badge with pride.

The gooseneck and fifth-wheel prep package serves serious haulers. The hitch platform accepts either configuration, with stamped bed holes and a seven-pin harness already installed. You maintain flexibility for whatever towing solution you choose without additional fabrication. The engine block heater prepares the diesel for reliable cold-weather starting.

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 vehicles. Vehicle information, options, and features may vary. Verify all details with the dealer. See dealer for complete details.