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When you are ready to take your business to the next level, visiting the O'Fallon Buick GMC website is the best place to start your search for professional grade vehicles. Their extensive new inventory includes a specialized selection of commercial options designed to meet the rigorous demands of your daily operations. Whether you are browsing for a versatile passenger van or a heavy-duty truck, their digital showroom makes it easy to explore the power and capability of the GMC brand from the comfort of your home or office.

At O'Fallon Buick GMC, our vehicle exchange program provides an excellent opportunity to transition into a newer model while maximizing your current vehicle's value. This program allows you to trade in your existing car, truck, or SUV and apply its equity toward your next vehicle purchase, making the upgrade process seamless and financially smart.

The 2026 Buick Enclave is a full-size SUV that makes a bold statement with its sleek and refined exterior design. From the sculpted lines to the premium details, the Enclave embodies sophistication and modern style to elevate your everyday drives around O'Fallon, Missouri.

Discover a new level of refinement and comfort inside the GMC Yukon. The 2026 Yukon offers a spacious, well-appointed interior packed with premium materials and advanced technology.

The 2026 GMC Sierra EV has officially arrived in O’Fallon, Missouri, and it is clear that GMC is not content with simply entering the electric truck market; they intend to dominate it. Building on the massive success of its initial launch, the 2026 model year introduces several key updates that make this truck more accessible and capable than ever before. For those who were waiting for more variety, the biggest news for 2026 is the expansion of the lineup. While the previous year focused heavily on the high-end Denali Edition 1, the 2026 model introduces the Elevation and AT4…

The 2026 Buick Envision is a compact luxury SUV that seamlessly blends elegant design with modern functionality. 

The 2026 GMC Acadia midsize SUV offers an elevated interior experience across its four available trims: Denali Ultimate, Elevation, AT4 and Denali.

Redefining Luxury: Why the 2026 Buick Electra EV is the Electric SUV You’ve Been Waiting For

This is the big one. The 2026 Buick Electra EV is the brand's first fully electric SUV, and it’s set to redefine what modern luxury looks like for drivers across the country, especially those eager for an upscale EV experience near St. Louis. Built from the ground up on GM’s revolutionary Ultium platform, the Electra is not just an electrified vehicle; it is a bold statement about Buick's future.

For St. Louis drivers who need a heavy-duty truck with an imposing presence, the 2025 GMC Sierra 3500 HD Chassis Cab delivers. 

Kirkwood drivers seeking a vehicle that delivers excellent performance and capability will find much to like in the 2025 Buick Envista. It packs a potent 1.2-liter turbocharged 3-cylinder engine that generates 137 horsepower and 162 pound-feet of torque. The turbo engine is paired with a smooth-shifting 6-speed automatic transmission to optimize power delivery.