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*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
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New and used
2026 GMC Sierra 2500 trucks
for sale
near
O Fallon, MO
- Down Payment
- $0
- Net trade-in value
- $0
- Months
- 72
- APR
- 7.0%
- Sales tax
- 0.0%
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.

New
2026 GMC Sierra 2500 Pro
Vehicle information
Features
Reviews
Daryl Hercules
Service Advisor, Kevin Gromer, was very helpful and professional. The tech, Ryan Hellrung, worked through lunch to complete the repair that day. Hats off to both of these Lou Fusz employees.
Vehicle information
Features
Reviews
always friendly service
friendly, reliable service, never have had a problem getting an appointment. I drive twenty miles just because of the good service received.






New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
From the first time I set foot on the Buick car lot, Beau
From the first time I set foot on the Buick car lot, Beau set off a great car search experience for me and my family. Not only was he awesome but everyone I met there was warm, friendly and caring. The O'Fallon Buick GMC not only brought back my faith in a car salesperson but also purchasing at a car dealership. From the salesman to the financial department each person took time to make sure you understood exactly what was happening. Hopefully, I want have to purchase another car for a while, but if so, I know where to go.

New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Review
Always a pleasant experience. I never have any complaints about service or customer service.

New
2026 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
Gus and his crew were amazing.
Gus and his crew were amazing. I bought this pickup off the internet, and they picked me up at the airport and 1 hour and 20 minutes I was headed home.

New
2026 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
Got transportation to home while repairs were being made
Got transportation to home while repairs were being made with a nice guy. The repair was not as scary as I thought it would be.

New
2026 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Easy process.
Easy process. Dmytro was very helpful and accommodating. Follow up was timely. Found the car I wanted online, submitted a request for information, received a call back immediately.
Vehicle information
Features
Reviews
Services
Awesome your staff is the best I've ever !!! Will always you BELLEMANN its literally the best customer service group I've seen Worth the extra mile to get there!!!

New
2026 GMC Sierra 2500 Denali
Vehicle information
Features






Vehicle information
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Reviews
Walter Washington was excellent.
Walter Washington was excellent. Very nice and kind. I would recommend him to all family and friends.

New
2026 GMC Sierra 2500 Pro
Vehicle information
Features

New
2026 GMC Sierra 2500 Denali
Vehicle information
Features

New
2026 GMC Sierra 2500 Denali
Vehicle information
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New
2026 GMC Sierra 2500 SLT
Vehicle information
Features

New
2026 GMC Sierra 2500 Pro
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New
2026 GMC Sierra 2500 Pro
Vehicle information
Features

New
2026 GMC Sierra 2500 SLT
Vehicle information
Features
New
2026 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Best kind of dealership.
Best kind of dealership. No pressure sales and mindful of your needs as a customer. We will definitely be repeat customers.
There are additional matching cars outside your search area.
Partial matches are generated by applying your search criteria to a larger search area. Our goal is to help you discover additional cars that match your search preferences.
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New
2026 GMC Sierra 2500 AT4X
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New
2026 GMC Sierra 2500 Denali Ultimate
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New
2026 GMC Sierra 2500 Denali Ultimate
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New
2026 GMC Sierra 2500 AT4
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New
2026 GMC Sierra 2500 AT4
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New
2026 GMC Sierra 2500 Denali Ultimate
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New
2026 GMC Sierra 2500 Denali
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New
2026 GMC Sierra 2500 Denali Ultimate
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GMC Sierra 2500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 2500 | $44,426 |
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
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