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Used
GMC cars
for sale
near
O Fallon, MO
under $40,000
- 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.






Used
2023 GMC Savana 2500 Work Van
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Reviews
Brian Reis did a great job.
Brian Reis did a great job. My husband got a new truck and Brian helped us find the right truck and walked us through the whole process






Used
2023 GMC Savana 2500 Work Van
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Reviews
awesome
great job by Brian on selling me my civic. Best deal ever. Will work with him again. Go see Brian To buy your next Honda






Used
2023 GMC Savana 2500 Work Van
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Reviews
Bommarito Volkswagen
I would like to thank Andre Branch for the excellent service I received during the purchase of my Atlas Cross Sport. This is my first SUV purchase and I love it. Thank you Andre for knowing exactly what I needed. I we continue to support him. Thanks, Vanessa Chambers Browley






Used
2023 GMC Acadia SLT
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Reviews
Thank you Aaron Voege
My salesman Aaron Voege was excellent,courteous and I will recommend him to all my friends.. He made the transition from my Altima to my new Rogue perfect. Thank you Aaron..
Perfect for us!
As we age, our reaction time may become slower. This vehicle is loaded with features that make me a safer driver. It connects wirelessly with my iPhone for hands-free Apple CarPlay. Love that! And the Acadia is a dream to drive. It’s the perfect size for me and my family






Used
2023 GMC Acadia AWD SLT
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Reviews
Helping to find a good car,fast
On August 12 _2023 ,I was at bommarito Honda to bay a car Cameron Martin was helpful . It's my fourth car from Honda and I love it thank you
Great road trip car
Got it for the ride ,comfort,great gas mileage on trips,can do a 750 mile trip and not be warn out from the ride.Can carry a lot of stuff .All the different options are great






Used
2024 GMC Terrain SLT
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Reviews
This review is for Jimmy, one of the sales associates
This review is for Jimmy, one of the sales associates here. I spoke with him about my options for trading my vehicle. He was very knowledgeable and helpful. Now that I know my options, I’m looking forward to working with him in the future!
I always bought the GMC Acadia (4 times) but decided to
I always bought the GMC Acadia (4 times) but decided to try the terrain. I absolutely love it and it's a great car for zipping around in town. I would take it for a weekend trip but not on a long trip as it doesn't have a lot of cab room, but for two people it is fine






Used
2023 GMC Acadia FWD SLT
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Reviews
Great people to work with.
Great people to work with. Tony Lemaster worked with me when I was turned down by other dealers and got me approved. Excellent experience.
great vehicle
traded in my 2013 buick enclave for this 2023 gmc acadia. i think the ride is a little better , fuel mileage is better over all comfort is great. Ed at Patriot Buick GMC was great in explaining all its features.





Used
2023 GMC Acadia SLE
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Features
Reviews
Excellent service.
Excellent service. Approved immediately. Thank you, Peter, for your help! There are many options to choose from.
Acadia and Lake City GMC Lover
Jonathan and Kahn were amazing. As always at Lake City GMC no pressure, very relaxed buying experience. Love my Acadia so much that this is my 4 th one.






Used
2023 GMC Acadia SLE
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Reviews
WOW - I am a forever customer now. AMAZING TEAM!
The staff could not have been better. They did not play games. they knew what they were talking about. They offered me more for my trade than 4 other St. Peters / West / South County Dealers included Lou Fusz, Bommarito and Sinclaire. They stayed late to get it done and even went to buy batteries for my remote. They also have the FOREVER warranty that is amazing bumper to bumper as long as you own the car. Totally worth the drive. These guys were so easy to work with. I wouldn't go anywhere else. They even have concierge service for free including bringing you a rental even for routine maintenance! You won't find a better deal, better people, or better service in St. Louis...maybe anywhere. Can not say how impressed I am with these folks. After weeks of car shopping they closed the deal with style! Thanks guys!
GMC!!!!!
I only have 700 miles on it so far but it’s been fantastic. I had a 2020 before this one and was fantastic also. GM is the way to go.






Used
2019 GMC Terrain SLT
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Features
Reviews
My Work horse.
I brought this truck in 2019. I kept taking it back to the dealership to get tweaked several times. Once it was figured out, never got any problems ever again. A little weak on the power side, but, other than that, its a magnificent vehicle. A total work horse. Great on gas. It is totally worth it.






Used
2023 GMC Canyon Elevation
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Reviews
The customer service at Dave Sinclair Buick was
The customer service at Dave Sinclair Buick was fantastic! They had a lot of work to do on my vehicle. The work was flawless. The level of communication during the whole process was superb. Eric in the auto body shop showed what excellent customer service should look like. I cannot thank them enough for the level of service the team provided.
Missing a few things that could really make it better.
Missing a few things that could really make it better. Homelink for garage door isn’t offered? Doesn’t come with a receiver type hitch however what does comes with it is almost the same amount of steel. The phone charger doesn’t work quite right and they know it.






Vehicle information
Features
Reviews
Entire family has a car
Brought my daughter to look at a new car. Put her in touch with Brook Winter. She walked away with a new GMC Arcadia. She is so very happy with her new SUV. She also was so pleased at the service she received from the time we entered the door until we left 3 hours later. We now have 2 Cadillacs and now she has her SUV. Will always recommend to someone looking to buy.
Good car only some issues
Have had lots of problems with the wheel sensors. New tires and new sensors and still have the same issue. Shows tire low and it is not. Just car not even two years the air conditioning would not blow out cold air. The compressor in the back went out, need to be replaced. Side car waring lights come on sometimes even though no car anywhere near me. Fold in mirrors are a joke the driver side comes in and out, however the passenger side sticks. Dealer said yeah that happens. This car is garage kept!






Used
2022 GMC Canyon Elevation
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Reviews
I had the absolute best experience at AutoNation in St.
I had the absolute best experience at AutoNation in St. Peters, MO. My salesperson, Anthony Smith, was upfront, knowledgeable, patient, and kind throughout the entire process. He never pushed me into anything—he made sure I was comfortable at every step and even gave me helpful tips on what to look for during a test drive. I later learned Anthony is somewhat of a local celebrity here in St. Louis, and it’s easy to see why. His approach and personality made the whole experience authentic and enjoyable. I also want to recognize Nate, the sales manager, who worked hard on my behalf to lock in the best deal for my situation. He truly went above and beyond to make sure everything lined up in my favor. And finally, Cameron in finance made the paperwork side of things stress-free. He explained warranties and add-ons so clearly that there was no need for pressure—the way he laid everything out spoke for itself. Because of his clarity, I was able to confidently choose what mattered most to me without feeling pushed. Altogether, this was hands-down the best car-buying experience I’ve ever had at a used car dealership. Anthony, Nate, and Cameron earned my trust, and I won’t hesitate to follow Anthony wherever he goes when I’m ready for another vehicle.
Diesel AT4 it!
GMC Diesel Canyon AT4. I've had this truck for a year-11,000 miles. I love it. The Denali and Elevation trim looked like junk. The AT4 can't compete with the Tacoma off road but, It holds it's own off road. The Diesel pulls like a beast and the exhuast brake, on all the moutain passes I drive, is worth it's wieght in Gold. I trailer the max. capacity regularly and it's smooth sailing. I traded in my 2500HD Silverado with the vortec 6.0 for this big, little truck. Best decision I've made in a while. I had this truck on order for 8 months and Gm never accepted the order. I finally found exactly what I ordered, just off the truck that morning that I called. 1300 miles away, I jumped on a plane to go get it. Crying shame GMC discontinued the diesel. The extra $ per gallon right now is easily washed by the increase in mileage, 32+ higway, 19 trallering almost 8000 #'s. I wouldn't want the truck without it. Wouldn't want the Elevation or Denali. Diesel AT4 is the truck. I'll keep it the rest of my life barring accident. I'm sure I can get 40 years out of this truck doing 10-12k a year. The regeneration of the exhaust has never come up but, I only do a little round town driving. Most of my miles are highway and hauling a load. I've heard horror stories about regen. from city folk, commuters... You get what you aim for. If you've given it a lot of thought and the diesel AT4 seems right for you, you won't be disappointed. Good luck finding one. GM - You've a winner here. don't let it get away. Ps. Cars.com doesn't have a choice of how I use this truck for WORK. And wouldn't let me submit this review without selecting one of thier 3 inadequate choices. So, I selected having fun cause I believe everything should be but, this is my WORK TRUCK!






Used
2017 GMC Canyon SLE
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Reviews
Easy, no pressure purchase
Sales consultant; Bob Reasoner, helped me with the car I was looking for. This dealership has a no rush, clarity policy that aloows you to inspect the car to your satifaction and present you with a car that has been safety inspected & detailed. Qualification and rates were resonable.
Great Truck
GMC Canyon Denali with the 2.7 Duramax diesel is a loaded power house with great fuel economy. 4x4 has a towing capacity of 7000 pounds, the best in class. 31 MPG on the highway! Previously owned a Tacoma but it would not pull our travel trailer with the V-6. Highly recommend the Canyon diesel, if you can find one!






Used
2017 GMC Acadia Denali
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Reviews
No comparison
I am 84 years of age therefore I have owned several automobiles and cannot compare any other that I have owned to this Acadia. It has been the best overall transportation I have ever owned!






Used
2019 GMC Terrain SLE
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Features
Reviews
Love love LOVE
I have owned my Terrain for 3 months now, and am absolutely in love with it. Super smooth, great pick up, and I get a lot of complements on both the exterior and interior design. I average 26.3 MPG city and highway combined, which is not bad considering I live in Florida so my AC is never off in the car.






Used
2024 GMC Terrain SLE
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Reviews
I recently purchased a car from this dealership, and I
I recently purchased a car from this dealership, and I cannot say enough how wonderful the experience was! From the moment I walked in, I was greeted with a warm and friendly welcome that immediately put me at ease. Every step of the process was smooth, straightforward, and stress-free. The customer service here is nothing short of fantastic. The staff was knowledgeable, patient, and truly seemed to care about helping me find the right vehicle. Special thanks to the general manager, Scott, who went above and beyond to make sure everything went as smoothly as possible. He made what can often be a stressful experience feel easy and enjoyable. I would highly recommend this dealership to my family and friends because I know they would have a great experience, just like I did.
One of the most attractive looking t cars GMC has ever
One of the most attractive looking t cars GMC has ever designed. Looks just like a Lexus. Extremely roomy. Love every aspect of my Terrain.






Used
2024 GMC Terrain SLT
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Reviews
Best experience I've ever had buying a car.
Best experience I've ever had buying a car. Great people to work with. Bob Reasoner and Cameron Brodeaux were great to work with. I will definitely buy from them again.
The GMC Terrain is a very dependable auto that I have had
The GMC Terrain is a very dependable auto that I have had no issues. The model is the AT4, which has the headsup display. Interior is nice with leather and all the electronics options.






Used
2017 GMC Acadia SLE-2
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Reviews
Perfect Size Car
This is the perfect sized car for me with 3rd row seating. When not in use the 2nd and 3rd rows lay down for extra storage. I like the exterior size too. It’s easy to maneuver in and out of parking.






Used
2023 GMC Terrain Denali
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Features
Reviews
Nicki was wonderful, I will recommend her to everyone I
Nicki was wonderful, I will recommend her to everyone I know that are in the market for buying a vehicle. Jarrod was also fantastic to work with. Both very personable and made the process very pleasant when it had been made dreadful from trying to deal with other salesmen at other dealerships. These 2 were excellent. I've never had a better car buying experience. I'd been to 4 other dealers who wouldn't budge on price for the same vehicle. I was able to drive my brand-new car off the lot for $6000 less than the competitors offered WITHOUT a single haggle!
Love Our New 2023 Denali Terrain!
We purchased the Denali Terrain 2023. The car is great. I have had four knee surgeries and needed a car to get in and out easily and comfort seating. The controls for adjusting the seat just the way you like are great. I am troubled also by back problems and totally love the heated seat when needed. Sometimes I just want to ride around and turn the heat on and adjust seat so my back feels better. The different controls and are numerous. I love the safety control warnings and info with traffic. The screen is fabulous and helps so much. When ever I park I like to drive in and park and then hold on brake put it in reverse so the screen then comes on and shows how I parked. I like the levers in cargo area for putting seats down and also like how flat they sit. Plenty of room. The back seat is roomy even when person in front is back. Enjoy being up higher than a vehicle. I feel I can see more and it also makes me feel safer. The Terrain looks beautiful and love all the chrome in front. The car seems bumpy but not as bad as our last. The roads are in rough shape here. It has a lot of pick-up my husband demonstrated that to me and he wont be doing that again unless it is necessary. It is a turbo 4 cylinder and can not believe the power you feel. All in all Iove the car and getting good mileage. Purchased car from Boucher in Waukesha. They were not pushy. Explained everything in detail and were very fair. Great place to purchase!
*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.
Used GMC by price
GMC under $40,000 by city
-
GMC under $40,000 in O'Fallon, MO
83 Great Deals out of 279 listings starting at $4,900
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GMC under $40,000 in O Fallon, MO
83 Great Deals out of 279 listings starting at $4,900
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GMC under $40,000 in Dardenne Prairie, MO
83 Great Deals out of 279 listings starting at $4,900
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GMC under $40,000 in Lake St. Louis, MO
73 Great Deals out of 231 listings starting at $4,900
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GMC under $40,000 in Lake Saint Louis, MO
73 Great Deals out of 231 listings starting at $4,900
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GMC under $40,000 in Cottleville, MO
89 Great Deals out of 302 listings starting at $4,900
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GMC under $40,000 in St. Paul, MO
64 Great Deals out of 208 listings starting at $4,900
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GMC under $40,000 in Saint Paul, MO
64 Great Deals out of 208 listings starting at $4,900
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GMC under $40,000 in St. Peters, MO
100 Great Deals out of 334 listings starting at $4,900
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GMC under $40,000 in Saint Peters, MO
100 Great Deals out of 334 listings starting at $4,900
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GMC under $40,000 in Weldon Spring, MO
92 Great Deals out of 311 listings starting at $4,900
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GMC under $40,000 in Wentzville, MO
49 Great Deals out of 164 listings starting at $4,900
GMC under $40,000 in O Fallon, MO by model
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GMC Acadia under $40,000 in O Fallon, MO
22 Great Deals out of 82 listings starting at $6,600
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GMC Terrain under $40,000 in O Fallon, MO
32 Great Deals out of 79 listings starting at $4,900
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GMC Sierra 1500 under $40,000 in O Fallon, MO
12 Great Deals out of 68 listings starting at $10,495
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This vehicle is certified pre-owned, backed by a manufacturer warranty, and typically undergoes a rigorous multi-point inspection to ensure quality and reliability.
This vehicle is currently in high demand given its competitive price, desirable features, and overall condition, and may have a higher chance of selling quickly.