Find your next pre-owned vehicle at Red Rock GMC. Our carefully selected inventory of used cars, trucks, and SUVs offers exceptional value, dependable quality, and competitive pricing. Whether you're searching for a reliable daily driver, a capable truck, or a family-friendly SUV, our team is here to help you find the right vehicle with a simple, transparent, and hassle-free buying experience.

- One owner
- Duramax 6.6L V8 Turbodiesel with 445 hp and 910 lb-ft torque
- 4WD with 2-Speed Active Transfer Case
- Gooseneck/5th Wheel Prep Package with hitch platform and bed-mounted 7-pin trailer harness
- Denali Ultimate Package with power sunroof and Technology Package
- Multicolor 15" Head-Up Display with Navigation System
- ProGrade Trailering System with integrated trailer brake controller and hitch guidance
- Bed View Camera with trailer vision provisions and HD Surround Vision
- Power-retractable assist steps with LED perimeter lighting
- Heated and ventilated front seats with 10-way power adjustment
- Bose Premium Sound System with SiriusXM 360L
- Apple CarPlay and Android Auto compatibility
- Wireless phone projection and charging
- Automatic emergency braking with lane departure and lane change alerts
- X31 Off-Road Package with hill descent control

This 2021 GMC Sierra 3500HD Denali delivers serious capability paired with refined comfort. The Duramax diesel engine provides the power and efficiency needed for demanding work or towing applications, while the advanced trailering technology makes managing heavy loads straightforward and safe. The Denali Ultimate Package elevates your experience with a power sunroof and comprehensive technology features that keep you connected and informed on every drive.

Inside, the Forge perforated leather-appointed seats deliver luxury and durability, with heated and ventilated surfaces that adapt to any season. The 15-inch head-up display projects essential information directly into your line of sight, while the suite of driver assistance features—including automatic emergency braking, lane departure warning, and rear cross traffic alert—helps protect you and your investment. The wireless charging and dual-zone climate control ensure comfort on long hauls.

The truck's exterior commands attention with the signature Denali grille, 20-inch polished aluminum wheels, and a spray-on bed liner bearing the Denali logo. Power-retractable assist steps with LED lighting provide practical access, while chrome recovery hooks and the polished exhaust tip reinforce this truck's functional beauty. Deep-tinted glass and the power sliding rear window complete the premium presentation.

Whether you need a work truck that handles challenging terrain or a premium hauler for weekend adventures, this Sierra 3500HD combines diesel efficiency with modern convenience. The Gooseneck/5th Wheel Prep Package and integrated trailering system mean you're equipped for whatever you tow. The one-owner history and comprehensive feature set make this a truck built for serious drivers.

We invite you to experience this Sierra 3500HD in person. Our team can walk you through every feature, discuss your towing needs, and answer any questions about this exceptionally capable diesel truck.

Select Shield includes a 3-month or 3,000-mile limited warranty on select vehicles, valid in all 50 states. Excludes as-is, tax, tow, salvage, or lemon law vehicles. Vehicle information, options, and features may vary due to multiple data sources. Verify all details with the dealer. The dealer is not responsible for errors or omissions. See dealer for complete details.