This 2021 GMC Sierra 1500 SLT delivers the capability and refinement you need in a full-size truck, combining rugged performance with thoughtful comfort and technology features.

- Power sunroof with premium glass
- SLT Premium Plus Package with multiple convenience and safety upgrades
- X31 Off-Road and Protection Package including all-terrain tires and suspension enhancements
- Premium Bose 7-speaker sound system with SiriusXM 360L
- Premium GMC Infotainment System with navigation and Apple CarPlay/Android Auto
- EcoTec3 5.3L V8 engine with 10-speed automatic transmission and 4WD
- Heated and ventilated front seats with 10-way power adjustment
- Adaptive cruise control with advanced driver alert packages
- ProGrade Trailering System with integrated trailer brake controller
- Spray-on bed liner with GMC logo and 120-volt bed-mounted power outlet
- 20-inch polished aluminum wheels with all-terrain tires
- Chrome assist steps and recovery hooks
- Lane keep assist with lane departure warning
- Rear cross traffic alert with ultrasonic park assist

This Sierra arrives finished in black with a commanding presence on the road. The SLT Premium Plus Package includes the SLT Convenience Package, SLT Preferred Package, both Driver Alert Packages I and II, chrome assist steps, and a professional spray-on bedliner. The X31 Off-Road and Protection Package enhances capability with an upgraded suspension, all-weather floor liners, and 275/60R20 all-terrain blackwall tires mounted on 20-inch polished wheels.

Inside, you'll find a well-appointed cabin with front bucket seats featuring heating, ventilation, and power lumbar support for both driver and passenger. The premium Bose sound system pairs with the GMC Infotainment System offering navigation, smartphone integration, and 4G LTE Wi-Fi connectivity. Wireless charging and multiple USB ports keep devices powered throughout your day.

The EcoTec3 5.3L V8 generates the power needed for work and weekend adventures, paired with a refined 10-speed automatic transmission and available 4WD capability. The off-road suspension and hill descent control prepare you for varied terrain, while the ProGrade Trailering System, hitch guidance with hitch view, and integrated trailer brake controller simplify towing tasks.

Safety receives considerable attention with dual front and side impact airbags, electronic stability control, automatic emergency braking, forward pedestrian braking, and lane change alert with side blind zone detection. The safety alert seat provides additional awareness for potential hazards. Keyless entry and start, remote vehicle starter, and an electronic security system add convenience and protection.

This truck carries the capability to handle your demands while delivering the comfort and technology expected in the SLT trim. With its combination of practical features, refined appointments, and genuine truck utility, this Sierra 1500 offers solid ownership value.

Proudly serving O'Fallon, IL and nearby communities like Shiloh, Belleville, Fairview Heights, Collinsville, and the greater St. Louis Metro East, our dealership is committed to delivering exceptional customer service and high‑quality vehicles at fair, competitive prices. From sales to service, our family‑owned team is driven by integrity, value, and a passion for automotive excellence. When you're searching for a trusted dealership near O'Fallon, Illinois, you can count on us to provide a transparent, community‑focused experience you'll feel confident recommending for generations to come.