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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
2017 GMC Yukon SLT
Vehicle information
Features
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.
Reliable and comfortable.
I bought this 2017 Tahoe w LT trim new. Have 60K on it now and have had no issues with it. We are not towing with it or doing high speed racing so we find the 5.3L Motor is smooth and quiet (and have not had any lifter issues which others have reported). Transmission and suspension also smooth. We keep Michelins on all our vehicles and have found this Tahoe very quiet and comfortable for road trips with 4-6 people and luggage. The LT trim pkg deleted some comfort items I wish I had (like heated steering wheel) but it still is pretty much leather-and-loaded so it was a good value at the time. I have had Suburbans for 35yrs before purchasing this Tahoe and I will probably go back to a Suburban for the extra cargo space when I trade this Tahoe in. But this has been a nice and reliable vehicle for us. No complaints.






Used
2021 GMC Sierra 1500
Vehicle information
Features
Reviews
Great dealership for both sales and service.
Great dealership for both sales and service. Veterans discount and no admin fee on sales. Jacob is a vey knowledgeable, friendly, caring, and helpful sales associate. We are totally pleased to know him. He?ll be our first choice when we come back to Gastorf to buy again.
This truck has a jerk when changing gears sometimes.
This truck has a jerk when changing gears sometimes. I enjoy the truck overall easy to handle and comfortable. Drive with ease sight is good when driving.






Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
A REPUTABLE CAR SALESMAN!
Ed Rapien has been our salesman for 15 years for Ford-Mercury products. He is very professional, sells the cars for a fair price, helps with backing up any problems we have had, & I actually feel he is an honest car salesman.My only complaints are that Ford is no longer making sedans or the Mercury brand. These are not Ed's fault, however. Thank heaven they kept him when dealership was sold from Price-Gnade to Trenary.
Great truck!
I bought my 2020 with 36k miles a couple of years ago and I now have 60k miles of trouble free very enjoyable driving. It was expensive, but worth every penny. The ride is so quiet and comfortable my wife and I prefer traveling in it instead of our 2018 Acura MDX which we also love. The 5.3 V8 has plenty of power and towing ability. The multi-function tail gate is genius, I hope to never be without one again. We so enjoy all the bells and whistles, especially the wireless phone charger. So glad I bought this truck!






Used
2021 GMC Sierra 1500 SLT
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Features
Reviews
Ryan did a GREAT job as did everyone else.
Purchased a 20yr old Nissan from Ryan, he and the team there gave me as much information and the condition of the vehicle as was possible based on the age and of course based on the age the car does have its issues which I had expected, but Ryan did a great job of working things out and as I arrived really late he and the necessary people to finish a deal were there and ready to help. I picked the car up the next morning with a full tank of gas ready for my 300 mile trip home. They gave me a great deal on the vehicle, far below what they were asking all said and done out the door.
Brake Pad Monitor
2021 GMC sierra 1500, 5.3, crew cab 4x4, 21000 miles. brakepad monitor lites up. dealership says needs brakes and rotors in back. one mo. on warranty. our rural roads dirty up the monitor. Needs new monitor. brakes look great to me. No noises. dealer says parts on order GM strike. Can't replace myself cause of computer...






Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
2018 crew cab gmc Sierra 1500
Am in disbelief every week at the Gas Pumps. Thou a big truck, mileage per gallons are 18 +. Last week it was 22.8. This week 19.78.






Used
2015 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
This truck is the base model and that is exactly what we
This truck is the base model and that is exactly what we were looking for. A good solid truck without all the fancy technology. It drives like a dream, handles just as well and the interior is sleek and well designed. Perfect black on black exterior.... a man's truck.






Used
2024 GMC Sierra 1500 Pro
Vehicle information
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Reviews
2015 Audi A3
I worked with Scott and Jim, both very friendly and easy to communicate with. Got to the dealership and didn’t spend more than 30 minutes there. Very smooth and pain free process!
I love it the look the interior mine is a red one and it
I love it the look the interior mine is a red one and it looks so good and it’s my baby and it runs so good and the technology is off the chain






Vehicle information
Features
Reviews
Great vehicle. Love it!
Everything I want in a vehicle. I love the interior and the slick look of the overall vehicle itself. Oh can’t forget about all the different options Available on this truck. It has so much to offer!




Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Service at Dave Sinclair Lincoln St Charles MO
Like this dealer for getting my Escape serviced.......they are really helpful
Short turn radius
I purchased pre-owned 2020 1500 SLT in February of this year. The truck rides comfortable and has plenty of room front and rear. My and I both enjoy it. My only drawback is the turn radius (lock to lock). It lacks compared to my wife's 2018 Yukon SLT, or the 2016 Ram I traded in. Have to many times maneuver twice to park it going forward or reverse. Otherwise happy with our purchase.





Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
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
Nicest, best performing truck I've ever owned
My truck has a great appearance, inside and out. It is a pleasure to drive; and rides and performs great. It is the best truck I've ever owned.






Used
2024 GMC Terrain SLT
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Features
Reviews
Excellent Service!!
I was in an accident and my car was totaled. I wanted to replace it with a new Nissan Rogue, it the car dealership that I got my last one at was no very anxious to help me find one since I hadn’t received the check from th insurance co. yet. Todd Eversgerd went out of his way to find a car, get the extras that we wanted installed on it, kept in contact with me re: when the car was delivered and the work was done, etc. He even went so far as to try to match the color of paint on the number of our license plate that had been scraped off during the accident! Eva’s very professional and went above and beyond in all aspects. When we got there, he was busy with someone else across the street at the VW dealership, so he had Matt help us wile he was over there. Matt also was excellent. He went over everything that Todd had written down including giving us the manuals, having us watch the videos, introducing us to the finance manager. Afterward,Matt took us out to the car went over everything about the car,and programmed our phones into the car. He then called Todd so Todd could make sure we didn’t have any other questions. I have never had anyone go to the lengths that stood went to make car buying so easy.Will definitely be back for our next car!
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
2022 GMC Canyon Elevation
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Features
Reviews
Excellent service and very respectful in reference
Excellent service and very respectful in reference choices and pricing. Adnan, salesperson, was very helpful and not pushy. Price for the EV Blazer was good. We looked both in Missouri and Florida. Butler won out
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!






Vehicle information
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Reviews
Great day
Buying a car made easy! Beautiful facility with everything needed to make that difficult decision less painful. Wonderful staff with great coffee and snacks. Thanks Dave Keyser
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
2023 GMC Acadia AWD SLE
Vehicle information
Features
Reviews
I had a excellent experience purchasing a vehicle with
I had a excellent experience purchasing a vehicle with Joe Rice. Time is important to me, and we got right to business, set expectations, and were able to make a deal. I actually enjoyed this vehicle purchasing experience :)
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
2014 GMC Terrain SLE-2
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Features
Reviews
The process couldn’t have been easier.
The process couldn’t have been easier. Salesman Bryan L was the absolute best!! I’d recommend him and the dealership to anyone looking for a new vehicle!
Nicest vehicle we've owned
I'm 6-4 so I'm looking for a comfortable vehicle that's easy to get in-and-out of plus is high quality. I don't buy new cars and in our 40 years of marriage it's the nicest used car we've purchased.






Used
2017 GMC Yukon XL Denali
Vehicle information
Features
Reviews
Great experience service Joe is helpful and very friendly
Great experience service Joe is helpful and very friendly would recommend him to everyone. Dealership is very clean and waiting time is always very short for normal service work
Fast & Awesome
great car has everything and then some. lots of seats and 2nd row heated is cool. it could use a little more under storage in the rear compartment and a cover






Used
2023 GMC Acadia FWD SLT
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Features
Reviews
My service representative, Danielle, was exceptionally
My service representative, Danielle, was exceptionally attentive to my needs and made sure I was comfortable throughout the process. She took the time to listen carefully, explain everything clearly, and ensure I understood each step. Her friendly and professional demeanor made the experience smooth and stress-free.
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
2025 GMC Acadia FWD Elevation
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Reviews
This is the fourth vehicle that we've purchased from ELCO
This is the fourth vehicle that we've purchased from ELCO Chevrolet, and there is a reason that I returned for my third Tahoe: they're the very best. Three weeks ago, I lost my husband unexpectedly and with two ELCO Chevy's, one 10 yr old Tahoe and a two-year-old Trailblazer that my children didn't want I felt it best to combine the trade-ins and purchase a new Tahoe that will take me another 10 years, providing me not only transportation but the security I need moving forward. The staff at ELCO were respectful, kind, understanding, and efficient. The purchasing experience was excellent from start to finish, and they took every step to make me feel like I was the only person in the dealership those two days. I am very grateful to Mark Gerecke and Branden Nehls for all they did to make the process as easy and comforting as possible given the circumstances. I am an ELCO customer for life.
I saw this car driving by the dealership and
I saw this car driving by the dealership and automatically was drawn to it because of its color. GMC calls it brown but one print out called it crystal metallic purple. It changes colors depending on the weather. I love the handling, the dash and all the bells and whistles! My grandchildren love how much room that it has!






Used
2025 GMC Canyon 4WD Elevation
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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.
So far I have been enjoying my 2025 GMC Canyon Denali.
So far I have been enjoying my 2025 GMC Canyon Denali. It has a great ride and is very comfortable. The Canyon drives very nicely and has plenty of power for my usage (I don't tow anything). It tracks well and has a very smooth ride that rivals previous BMWs (328 and X5's). I have had zero issues but the vehicle is only 1.5 months old (approx 1,700 miles on it). THe only downside (which many people agree on) is that it is seriously lacking storage space. Center console storage is about 1/2 what it was in my 2020 Jeep Wrangler and under seat storage (rear seats) is almost useless ..very little space. That being said, I'd still recommend the GMC Canyon and hope it continues to impress me.






Used
2020 GMC Terrain SLE
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Reviews
michael meyer
michael meyer was such a wonderful help! i won't be going to any other places in the future to make a car purchase! he makes the process seem so easy and so easy going & calm. love my new car he recommended! :)
I have had this car 5 years 90000 km.
I have had this car 5 years 90000 km. No problems so far, it has been exceptionally good. The only money I have spent is gas and oil changes. I. Would buy another one
*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
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GMC under $40,000 in O'Fallon, MO
86 Great Deals out of 283 listings starting at $4,900
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GMC under $40,000 in O Fallon, MO
86 Great Deals out of 283 listings starting at $4,900
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GMC under $40,000 in Dardenne Prairie, MO
86 Great Deals out of 283 listings starting at $4,900
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GMC under $40,000 in Lake St. Louis, MO
74 Great Deals out of 234 listings starting at $4,900
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GMC under $40,000 in Lake Saint Louis, MO
74 Great Deals out of 234 listings starting at $4,900
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GMC under $40,000 in Cottleville, MO
91 Great Deals out of 307 listings starting at $4,900
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GMC under $40,000 in St. Paul, MO
67 Great Deals out of 211 listings starting at $4,900
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GMC under $40,000 in Saint Paul, MO
67 Great Deals out of 211 listings starting at $4,900
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GMC under $40,000 in St. Peters, MO
101 Great Deals out of 337 listings starting at $4,900
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GMC under $40,000 in Saint Peters, MO
101 Great Deals out of 337 listings starting at $4,900
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GMC under $40,000 in Weldon Spring, MO
94 Great Deals out of 316 listings starting at $4,900
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GMC under $40,000 in Wentzville, MO
52 Great Deals out of 168 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 83 listings starting at $6,700
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GMC Terrain under $40,000 in O Fallon, MO
33 Great Deals out of 80 listings starting at $4,900
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GMC Sierra 1500 under $40,000 in O Fallon, MO
14 Great Deals out of 71 listings starting at $10,000
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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.