New GMC Sierra 1500 Trucks in O'Fallon, MO

  • New in O'Fallon, MO
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New GMC Sierra 1500 Trucks in O'Fallon, MO

If you're in the market for a capable, stylish and rugged truck, the new Sierra 1500 could be the right fit for you. At O'Fallon Buick GMC near Wentzville and St. Peters, MO, we have the GMC truck you've been looking for. With regular cab prices starting at $37,000 to the more rugged AT4 starting around $70,000, we have the truck for you.

New GMC Sierra 1500 For Sale

The 2025 GMC Sierra 1500 is now for sale at O'Fallon Buick GMC near St. Louis. With the new year comes a new lineup of colors, trims, and features here on our lot. The Sierra 1500 has kept the same great features from the 2023 model year, which includes the popular-by-demand Super-Cruise technology and available 15" heads-up display, but has upgraded tech features like a Wi-Fi hotspot, Bose speakers, wireless charging and more.

GMC Sierra 1500 Trims

The 2025 Sierra 1500 lineup includes:

  • GMC Sierra 1500 Pro
  • GMC Sierra 1500 SLE
  • GMC Sierra 1500 Elevation
  • GMC Sierra 1500 SLT
  • GMC Sierra 1500 AT4
  • GMC Sierra 1500 AT4X
  • GMC Sierra 1500 AT4X AEV Edition
This brings the same great middle-ground trim levels like the SLE and Elevation, with an all-new addition to the lineup with the 2023 AT4X AEV. 

Sierra 1500 AT4 For Sale near St. Louis

While the AT4 edition comes at a higher price point, GMC truck lovers are always looking for rugged features that stand out from competitors like Ford or Chevrolet. At O'Fallon Buick GMC, we have no shortage of AT4 trucks for sale.

The Sierra 1500 AT4 got an upgrade in 2023 with the the AT4X AEV that continues into 2025. But what is the AT4X AEV and what does AEV stand for? While the AT4 is GMC's first line of extra-rugged trucks, the AT4X AEV is an expanded version of toughness. The AT4X AEV comes with larger tires, increased clearances, more durable skid plates and unique steel bumpers. The AEV, which stands for American Expedition Vehicle, is hard to come by. If you're interested in the AT4 or AT4X AEV, contact our team today to reserve yours!

Difference from 2024 to 2025

The 2025 GMC Sierra 1500 introduces several updates over the 2024 model, focusing on enhancing both aesthetics and functionality.

Key Updates:

  • New 22-Inch Wheels: The 2025 model offers new 22-inch wheels, providing a fresh look to the vehicle's exterior.  
  • Trim-Specific Grille Designs: Each trim level now features distinct grille designs, allowing for greater customization and visual differentiation.
  • Expanded Adaptive Cruise Control and Trailering Assist: These features, previously exclusive to higher trims, are now standard on the AT4 and Denali trims, enhancing safety and convenience.  
  • Front and Rear Parking Assistance Sensors: Now available on the Pro and SLE trims as part of the Pro Safety Plus package, these sensors aid in maneuvering and parking.  
  • Interior Enhancements: The 2025 Sierra 1500 boasts over 40 inches of combined driver-focused digital displays, the most in its class, improving user experience and accessibility.  
  • Engine Options: The model continues to offer a range of engines, including the TurboMax 2.7L, 5.3L V8, 6.2L V8, and a 3.0L Turbo-Diesel, catering to diverse performance needs.  

The 305-HP (horsepower) Diesel engine gives the Sierra 1500 a class-leading capability with 495 lb-ft of torque and a class-leading 4WD towing capacity of up to 13,000lbs! This gives the Sierra 1500 AT4X a huge advantage over other competitors in it's class like the Silverado from Chevrolet or F-150 from Ford. So why consider this new AT4X diesel truck?

  • Diesel vehicles usually last longer
  • Diesel vehicles have higher efficiency compared to standard gas
  • Diesel vehicles offer more torque (better for hauling!)
  • Lower CO2 emissions, especially with the required usage of DEF in 2010
  • Diesel vehicles have slower depreciations due to their limited availability/production and high demand

Find Your Next GMC Sierra 1500 Truck in O'Fallon

Contact the team at O'Fallon Buick GMC near St. Charles to explore our full lineup of GMC trucks for sale. We offer a no-pressure buying experience, some of the best prices in the area, and a service department that is sure to make you a customer for life. Visit us in person for a test drive today!