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The new GMC Acadia is longer and broader than the previous model, giving it a more aggressive stance. The front end has been completely redesigned, with a new grille and headlight design. LED daytime running lights are standard on all models. The rear end features newly designed taillights and a revised bumper.

The Acadia rides on 19-inch aluminum wheels (standard on SLT and Denali models) or 20-inch wheels (optional on SLT and Denali). All-wheel drive is available across the lineup.

When you need to haul a boat or an RV to your favorite campsite, then you need a heavy duty pickup truck. For 2022, the GMC Sierra 2500HD offers all the power and utility you need in a heavy duty truck. Come down to O'Fallon Buick GMC and check out our inventory of Sierra 2500HD trucks.

The GMC Sierra 2500HD offers several cab and truck bed configurations to satisfy all drivers. In the base model, you'll get a regular cab with a long bed. This truck can carry up to 83.5 cubic-feet of cargo. With the included…

The GMC Terrain is a versatile SUV that looks modern and rugged. Adding to its appeal is its great safety package. At O'Fallon Buick GMC, we want our customers to be able to stay safe on the roads around O'Fallon, MO, and the GMC Terrain can help protect you.

At O'Fallon Buick GMC, our team is excited to tell customers about the 2022 Buick Enclave. This three-row SUV has a tech-savvy cabin that's loaded with features for responsive connection and more.

The all-new 2022 GMC Canyon offers capability features that are sure to impress you. This pickup truck is perfect for those who need a vehicle that can handle anything. With a maximum payload of 1,675 pounds and a towing capacity of 7,000 pounds, the Canyon can handle whatever you throw at it. Whether you're hauling cargo or pulling a trailer, this truck will get the job done.

The Canyon also features a Duramax turbo-diesel engine that provides plenty of power and torque. This engine is capable of reaching up to 30 miles per gallon on the highway…

The GMC Hummer EV is something that you'll definitely notice on the roads around O'Fallon. It has an imposing presence and a modern style, and what makes it really intriguing is that it runs entirely on electric power. This vehicle has become a popular one at O'Fallon Buick GMC. We're pleased that there are two high-performing versions of it.

Some customers may prefer the pickup truck. The Hummer pickup has up to 1,000 horsepower and up to 11,500 pound-feet of torque. These are truly amazing numbers that showcase just how fun it can be…

Buick is known for providing drivers with a thrilling experience at the wheel. This is certainly true of the Buick Encore GX, a compact SUV with a lot to offer. Not only are both of the powertrains exciting, but they are both efficient, making this vehicle a practical choice.

At O'Fallon Buick GMC in O'Fallon, MO, our team loves showing off the connectivity features for the GMC Sierra 1500! Stop by the dealership to check out features such as Google built-in and the myGMC mobile app. 

There are numerous reasons to choose a Buick Enclave Avenir, such as its stellar ride quality and rich performance features. It has a powertrain that enhances your experience on the road.

When you stop by O'Fallon Buick GMC in O'Fallon, MO to check out the interior of the GMC Acadia, you'll notice how luxurious the seating is as well as the great comfort amenities for you and your passengers. There are also great luxury features such as the dual sunroof!