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The 2026 GMC Canyon is an impressive mid-size pickup truck available at O'Fallon Buick GMC. Standard features like LED projector headlamps with fade-on/fade-off animation, LED signature daytime running lamps, heated power-adjustable mirrors, and a remote locking tailgate provide style and convenience. Depending on the trim, you'll find additional exterior upgrades like:

The GMC Sierra 1500 is back for 2026 with an impressive array of utility features to make your driving experience more convenient and capable than ever.

Safety comes standard with the 2025 GMC Sierra EV. This groundbreaking electric truck showcases the latest advances in driver assistance and collision avoidance technology to provide unprecedented protection and security. From automatic emergency braking to lane keep assist, the new Sierra EV has your back in O'Fallon and across Missouri.

The 2025 GMC HUMMER EV SUV delivers unrivaled utility for your O'Fallon adventures. With an advanced Ultium Drive System featuring three electric motors producing an estimated 1000 horsepower and 11,500 pound-feet of torque, this electric SUV conquers any terrain. The Continuous Damping Adaptive Ride Control and electronic 4-wheel steering with CrabWalk functionality provide impressive handling both on and off the road around Overland.

The federal EV tax credit of up to $7,500, long a cornerstone incentive for electric-vehicle buyers, is slated to expire on September 30, 2025, following legislation enacted earlier this year. Have you considered an EV truck like the Sierra EV or Hummer EV? Now may be your chance to score an affordable price at O’Fallon Buick GMC near Troy, St. Louis and Wentzville.

The 2026 Buick Enclave is a full-size SUV that offers head-turning style and modern sophistication. Its sleek exterior design is sure to make a statement as you cruise the streets of O'Fallon, Missouri.

The 2026 Buick Encore GX is a sporty sub-compact SUV built for an engaging driving experience.

Maximize Your Trade In Value Effortlessly

At O’Fallon Buick GMC, our Vehicle Exchange Program puts the power of your current vehicle’s value to work right away. Simply bring in your car, truck, or SUV, and our Vehicle Exchange Specialist (a sales manager with the authority to act fast) will ensure you get top dollar without the back and forth negotiation. It’s a seamless transition: use your equity toward a brand new Buick or GMC right here in O’Fallon—saving time, effort, and hassle in the process.

Enjoy Smarter Financing and Lower Costs

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The 2025 GMC Acadia debuts with an impressively redesigned interior that provides more room for passengers and cargo, making it an excellent choice for Missouri families in and around O'Fallon. With its spacious and versatile cabin, the GMC Acadia is now more accommodating than ever before. Get to know this redesigned SUV before shopping at O'Fallon Buick GMC.

When it's time for a new vehicle, many savvy shoppers are turning to leasing as a cost-effective alternative to traditional financing. Leasing a car, truck, or SUV can offer several compelling benefits over buying, making it an attractive option for those looking to save while still enjoying a new vehicle.