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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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Used
GMC cars
for sale
near
Union, IL
- 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 Acadia Denali
Used
2018 GMC Yukon SLT
Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
I received a recall letter.
I received a recall letter. I was actually able to get an appmt the following day. It took 55 min. They told me about an hour my service advisor Vince was great. All good
Any reviews on this vehicle is not correct.
Any reviews on this vehicle is not correct. We are first owners and it’s been an excellent truck. We hate to see it go !
Vehicle information
Features
Reviews
Eduardo gave me an amazing service at the dealership and
Eduardo gave me an amazing service at the dealership and helped me find a car.
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
2018 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Great team from service to parts to sales can’t say
Great team from service to parts to sales can’t say enough good words about everyone
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
2025 GMC Sierra 1500 Denali Ultimate
Vehicle information
Features
Reviews
My sales person at Castle Chevrolet was Tony Twall.
My sales person at Castle Chevrolet was Tony Twall. He was awesome to work with. He answered all my questions and was very knowledgeable. I have to say that this was the best vehicle buying experience I have ever had. My next purchase will be with the Castle dealership in McHenry IL and I will ask for Tony to be my sales person.
Overall I am very happy with my new Truck.
Overall I am very happy with my new Truck. GMC however needs to address their software glitch where the display screen intermittently stops working or the audio cuts in and out. I keep hearing a software update is being worked on but that was a while ago?
Used
2023 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Alexander Lopez was great to work with, hopefully he sent
Alexander Lopez was great to work with, hopefully he sent that cup and shirt. Wonderful experience.
Awsome
Stong engine and smooth! Highly recommend for familys or someone who likes a smooth truck. Purchased new and have had zero issues since then. Love it!
Used
2023 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
The staff is respectful and patient.
The staff is respectful and patient. They explained things for me to understand. Good customer service. They were not as pushy like other dealerships/service stations. I am a repeated customer.
Like the truck but also disappointed
Got the duramax diesel and getting 24 city and 32 highway is very good. Truck drives nice and is very comfortable. My 2 issues with this truck is the backup camera at night is useless (very dark) and interior lighting is not very good. You would have thought a 78k truck would have footwell lights, but it doesn’t.
Used
2023 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Great people to help in getting the car I wanted.
Great people to help in getting the car I wanted. The service to make things happen that insured trust and honesty was greatly appreciated. Thank You.
"THE" GMC Truck!
I have a 2023 GMC Sierra 1500 Denali with the 3.0 Diesel engine. I have 20,000 miles on it at the time of writing this. Never owned a diesel before and now i don't think i will own another one without it. I LOVE the engine in this truck. Only complaint would be that it likes DEF fluid while towing so pick up some extra DEF before you head out to tow something. Put about 8K miles on it this summer without adding any DEF fluid. seems to use a little more in the winter or when towing. Very quiet for a deisel and the fuel economy is awesome. Driving 70 mph down the freeway this truck gets about 30mpg, Drive 55mph on regular highways and this truck gets almost 40mpg. All around driving for me is about 26mpg. I used to fill up twice a week with my gas motor and now only once a week. Wireless Apple Carplay works great and the voice texting and mapping is a big plus. I also have the new SuperCruise feature which is awesome. Get on the freeway and set the supercruise on and the truck drives itself until i get to my exit (about 28 miles from home to work). Bose stereo is out of this world and all the storage is great to. I have a swingout bed toolbox, aluminum roll up tonneau cover, Lighted black GMC front emblem, Gloss Black 22" wheels, All Black decals and my dual exhaust bezels are black as well. I rotate the tires and change the oil every 5,000 miles. Couldn't ask for a better truck. Might get the ultimate next time as that has the messaging seats which i kinda wish I had.
Used
2018 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
But a very nice Nissan Sentra from them I was looking
But a very nice Nissan Sentra from them I was looking around and found out that they have very good prices and the quality is good too so thank you Andrei for helping me out!
new owner of the gmc denali, 2018 6.2
handles and drives great, the electronics don't always work, mirrors don't always work, spray with wd 40, check engine light, EVAP culprit, auto nation has no luck with this, will drive it till the warrenty expires and its back to ford for me
Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
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
2023 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Frank was friendly and helpful.
Frank was friendly and helpful. He look up my records to make sure I was not receiving and paying for unnecessary service. He provided a coupon.
Just wondering
Does anybody else’s truck just sit there after you put it drive? I have to bump the accelerator to have it go into gear. ??????????????????????????????????????????? ?????????????
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Excellent service Professional service Quick
Excellent service Professional service Quick service Polite customer service Excellent customer communication Very detailed repairs
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 Denali
Vehicle information
Features
Reviews
Brian at Marquardt service department was extremely
Brian at Marquardt service department was extremely helpful to get my car all ready for winter with a new set of tires. I appreciate having a great dealership near by to handle my car needs.
Great Truck
I did my research and test drove several models. The GMC 1500 Duramax does everything I want it to do and more. Great gas milage, nice power and very comfortable.
Used
2018 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
Very simple.
Very simple. Every aspect of my purchase was simple and straightforward. Bruno my salesman and Kevin the Manager went above and beyond from the moment I walked in. Well done.
best in class
My GMC Sierra is the best ride I have had in all the years that I have been driving. I started driving in 1977. I love my new Sierra.
Used
2024 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Wonderful customer service, amazing financial people,
Wonderful customer service, amazing financial people, overall amazing experience! I’ll definitely be back again
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
Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Thank You for an Exceptional Buying Experience Dear
Thank You for an Exceptional Buying Experience Dear Andrew and Alex, Thank you so much for all your help with my recent purchase of the 2024 BMW X3. You made the online and over-the-phone buying experience truly enjoyable. Your friendly and approachable attitudes made me feel welcome from day one. I also really appreciate your fair pricing and outstanding customer service—especially delivering my BMW all the way to Peoria, IL. Your efforts have left a lasting impression, and I will surely return for all my future auto purchases. You both went above and beyond, and I’m sincerely grateful. Thank you again for everything. Best regards, Jamie Peoria, IL
Best truck we have owned!
Truck meets my and my wife's needs. She loves her and I do to! Love sport mode and the tow hail mode. Rides like a Cadillac!
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
I just got my Tesla at Affinity.
I just got my Tesla at Affinity. Milton was amazing. He knew exactly what I needed. I strongly suggest that you go see him before EV credit is over.
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
2022 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Yesterday I purchased a car by phone for the first time.
Yesterday I purchased a car by phone for the first time. As a senior citizen I sold my car on the 9th of March thinking I would get totally travel by taxi or Uber or Lyft but I under estimated the value of getting up and going when you like. The team at CarMax from beginning to directions to the highway were the very best. Each and every member made me feel valued as a customer. And feel like they were treating me like they would their family members. You could not ask for more than that. Bj
2022 GMC Sierra SLT 3.0 Duramax
My 2022 GMC Sierra 3.0 Duramax pickup truck is a good truck. I work on a farm and I also drive an hour to see my girlfriend. For the farm, it has excellent towing capability and for the hour long drive to go see my girlfriend, depending on the weather for traveling, I can get up to 35 miles to the gallon!
Used
2014 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
From the very first contact, through the entire sales
From the very first contact, through the entire sales process and right through to delivery, the service from Ramy has been absolutely first class. Everything was handled with professionalism, transparency, and genuine care, making the whole experience smooth and stress-free. Ramy was knowledgeable, attentive, and always willing to go the extra mile to ensure I was completely satisfied. The dealership itself is amazing, and the level of service provided was faultless from start to finish. This was one of the best car-buying experiences I’ve had, and I’ll definitely be coming back for future purchases without hesitation.
Great truck, solid engine, comfortable, smooth, and it
Great truck, solid engine, comfortable, smooth, and it handles great for such a large vehicle. Get one and enjoy miles of roadtrips with all you can tow or haul.
Used
2023 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
It was an amazing experience, I'd highly recommend Castle
It was an amazing experience, I'd highly recommend Castle to friends and family!! I drove down from Wisconsin and it definitely was worth it.
Amazing Truck
Excellent comfort and very good truck, it is very functional in every way, both for business and for personal, it can be said that I have the 2.7L Turbo engine and I can move up to 11500Lbs already checked by me
Used
2025 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
This was a great experience and Mike was awesome to deal
This was a great experience and Mike was awesome to deal with. There was no pressure to buy and he answered all our questions promptly
I have the 1500 double cab with standard bed.
I have the 1500 double cab with standard bed. The reason I have this vehicle is I really like the 6.5 foot bed. The crew cab with same bed is just too long. The things I dislike about this model is that it only comes in the SLE model. For the 2025 that means the external mirrors do NOT have a power fold in and it does not have a seat memory for more that one driver. The power fold in for the mirrors is extremely important to me.
About GMC
What is the cheapest GMC vehicle available?
The GMC Acadia Limited is the cheapest available vehicle by average Cars.com listing price in GMC's lineup, with an average listing price of $13,275.
Which GMC vehicle has the best MPG?
The GMC Sierra 1500 Hybrid can reach up to 21 MPG city and 22 MPG highway for a combined rating of 22 MPG. The GMC Terrain with traditional internal combustion engine offers up to 26 MPG city and 30 MPG highway for a combined rating of 28 MPG.
These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle model year, trim, driving conditions, driving habits, vehicle maintenance, and other factors.
Which GMC vehicle has the longest range?
The electric GMC Sierra EV can travel up to 440 miles on a single charge depending on electric motor and battery options.
EPA-estimated range is the distance, or predicted distance, a new plug-in vehicle will travel on electric power before its battery charge is exhausted. Actual range will vary depending on model year, driving conditions, driving habits, elevation changes, weather, accessory usage (lights, climate control), vehicle condition and other factors.
Which GMC vehicle has the most deals?
The GMC Sierra 1500 has the most available deals on Cars.com with 4615 great deals out of 16770 listings starting at $1,986.
Where can I find the most GMC deals?
The most GMC deals can be found near Carpentersville, IL with 232 great deals out of 857 listings starting at $2,999.
*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
Used GMC by city
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Used GMC in Marengo, IL
98 Great Deals out of 379 listings starting at $5,450
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Used GMC in Huntley, IL
147 Great Deals out of 573 listings starting at $2,999
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Used GMC in Lakewood, IL
156 Great Deals out of 550 listings starting at $2,999
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Used GMC in Woodstock, IL
177 Great Deals out of 583 listings starting at $2,999
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Used GMC in Hampshire, IL
125 Great Deals out of 520 listings starting at $6,293
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Used GMC in Lake in the Hills, IL
174 Great Deals out of 658 listings starting at $2,999
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Used GMC in Crystal Lake, IL
165 Great Deals out of 621 listings starting at $2,999
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Used GMC in Bull Valley, IL
186 Great Deals out of 636 listings starting at $2,999
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Used GMC in Pingree Grove, IL
173 Great Deals out of 683 listings starting at $5,999
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Used GMC in Gilberts, IL
202 Great Deals out of 789 listings starting at $2,999
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Used GMC in Genoa, IL
69 Great Deals out of 288 listings starting at $6,293
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Used GMC in Algonquin, IL
227 Great Deals out of 838 listings starting at $2,999
Used GMC in Union, IL by model
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GMC Sierra 1500 in Union, IL
37 Great Deals out of 124 listings starting at $8,850
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GMC Acadia in Union, IL
23 Great Deals out of 81 listings starting at $6,299
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GMC Terrain in Union, IL
30 Great Deals out of 72 listings starting at $6,293
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GMC Sierra 2500 in Union, IL
11 Great Deals out of 58 listings starting at $2,999
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GMC Yukon in Union, IL
6 Great Deals out of 34 listings starting at $14,477
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GMC Yukon XL in Union, IL
5 Great Deals out of 32 listings starting at $4,995
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GMC Sierra 3500 in Union, IL
4 Great Deals out of 22 listings starting at $6,950
Used GMC by body style
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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.
