New GMC Inventory in O'Fallon, MO

New GMC Trucks & SUVs in O'Fallon, Missouri

If you're in the market for a new GMC truck or SUV in the St. Louis or Wentzville area, O'Fallon Buick GMC is your one-stop-shop for all things GMC. We're proud to carry the popular Sierra, Canyon, Acadia, Terrain, Yukon and stock multiple trim levels including the tough AT4, classy Denali, or Base level for any taste or budget...Read More...

Disclaimer: The Manufacturer’s Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.

1Dealer Discount applied to everyone

New GMC Sierra

The GMC Sierra is a classic choice for truck enthusiasts. The latest incoming 2023 model can tow anywhere 8,700 to 9,400 pounds and can qualify as a great write-off opportunity for your business tax needs. The Sierra comes in many trim levels, with the most popular being our SLT version and most expensive and rugged being the AT4.

At O'Fallon Buick GMC, we always offer a great selection of new GMC deals and specials to help you lease or finance the Sierra 1500 of your dreams. If you're ready to get your hands on the wheel of a new GMC Sierra, visit us near St. Charles and St. Peters today.


A GMC SUV is a great investment for your every day driving or family needs in O'Fallon. Our customers love the Terrain for daily use. This small-sized SUV is a terrific option for small families or single drivers looking for better gas mileage than the Acadia or Yukon counterpart. The Terrain comes in all GMC-offered trim levels, including the Denali.

If you're ready to upgrade to an Acadia or Yukon, make O'Fallon Buick GMC your dealership. We understand why families or businesses choose to purchase a large SUV for their travel and we have plenty in stock to choose from. Visit us from St. Louis or Wentzville to chat with our friendly and family-oriented sales team to get a deal on your next Yukon or Acadia.

Contact O'Fallon

Get in touch with us online or submit a pre-order to get the next GMC truck or SUV you've been looking for today! See something you like? Don't hesitate to pick up the phone and give us a call to reserve a test drive. We can't wait to meet you!