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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 Sierra 1500 trucks
for sale
near
Thornton, CO
under $899,990
- 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 Sierra 1500 AT4X
Vehicle information
Features
Reviews
They were a pleasure to deal with and made the process of
They were a pleasure to deal with and made the process of selling my car easy. They gave me the greatest deal available. I have earned their future business.
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
2020 GMC Sierra 1500 Denali
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Reviews
My old car broke down and I needed a car for work and was
My old car broke down and I needed a car for work and was really nervous to have to get a new one as I have always had bad experiences with dealers, I saw they had a really nice Frontier and went in to see it and Joe one of the managers, Charlie, and Travis took amazing care of me, I didn't feel pressured at all and with all the questions I had everything was answered.
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
2016 GMC Sierra 1500 Base
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Reviews
The dealership responded quickly and were knowledgeable
The dealership responded quickly and were knowledgeable about the vehicle I was interested in. They also maintained contact even though I didn’t purchase that particular car.
My 2016 GMC Sierra 1500 SLT All Terrain - Love it!
I've owned this GMC Sierra 1500 All Terrain since it was 8 months old. With the exception of two warranty issues (failing power brake vacuum pump and transmission electrical harness), I have been totally happy with this truck. Up until now, my 1996 Chevrolet K1500 Silverado with it's 5.7L Vortec engine was my favorite truck of all time, this GMC (5.3L LS engine, 8 speed automatice) has earned the top spot now of my all time favorite truck. It is comfortable to drive, and runs as good as the day I bought it over 5+ years ago. I've got 71.5K miles on it. My biggest issue is I wished it had the 6.2L engine for better towing capabilities. Other than that ... love this truck.
Used
2023 GMC Sierra 1500 AT4
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Reviews
I love this dealership way way underpriced best quality
I love this dealership way way underpriced best quality awesome selection even better staff it's funny even the reception is unlike other dealerships the reception is for this dealership actually had car knowledge which was very exciting because if the receptionist knew what was going on with automobiles I could only imagine how great this whole sales team is again thanks for making everything so streamlined
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
2026 GMC Sierra 1500 Pro
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Reviews
It was such a good truck honstly the greatest thing I
It was such a good truck honstly the greatest thing I have ever drove in my entire life I am so happy that I have been blessed with this being my first ever car
Used
2025 GMC Sierra 1500 SLT
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Reviews
An Amazing Car Buying Experience
My wife and I recently purchased a new car from McDonald Mazda in Lakewood. I’ve purchased 7 cars in my lifetime from dealerships, and this was by far the easiest and most satisfying car purchase I’ve ever made. Customer service was EXCELLENT, and even the finance manager (Johnny) was super easy to work with and not pushy at all. I was so surprised at how open and transparent everyone was with buying a car. AND it didn’t take countless hours to make the purchase. Yaay!! Our salesperson was named Santiago, and he was extremely helpful in answering our questions, and showing us all the details about the car we ended up buying. I was expecting some type of dealer fine print to pull the rug from under us, or some excuse about why the price was going to be higher, but everything was clear and accurate (I like to research cars before I even go to a dealership to look at them). We got way more than I expected for our trade-in, we were able to take advantage of Mazda’s financing deal AND special discounts, and Santiago even took our photo with the new car once we were done (and put it in a frame for us). Seriously?! I’ve NEVER had a dealer/salesperson come anywhere close to this level of customer service. 10-stars for McDonald Mazda, Santiago, and Johnny. You know they made a lasting impression because we still remember their names a month after buying our car! :-)
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?
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Reviews
Very helpful online application was easy 1 day
Very nice easy to get financed very helpful did not have to wait in and out it was I recommend 👍auto warehouse to my friends and family very good
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 Denali
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Features
Reviews
Great experience at this store when I came by today.
Great experience at this store when I came by today. Thanks for your help see you next timr
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
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Reviews
"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
2024 GMC Sierra 1500 Denali
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Reviews
Zach is a good guy by far favorite car salesman
Zach was the guy who helped me out very professional even tho I couldn’t get the car I wanted he tried super good people maybe here soon we can get me into what I want
2024 GMC sierra 1500 duramax 3.
2024 GMC sierra 1500 duramax 3.0 is great truck. Great ride and great MPG. 100% recommend to any prospective buyer. Love the truck and how it perform.
Used
2024 GMC Sierra 1500 Pro
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Reviews
The best dealer I have dealt with.
The best dealer I have dealt with. Very nice will get you what your looking for out of vehicle open and honest.
Looked at more expensive truck with less options, bought
Looked at more expensive truck with less options, bought the GMC SIERRA AT4 Turbo Diesel 6. I now only put fuel im once a month. And long distance trips are easier due to better fuel economy. One of my best investments ever.
Used
2020 GMC Sierra 1500 AT4
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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
2011 GMC Sierra 1500 SL
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Reviews
I have had my 2011 GMC Sierra for a few years now, i love
I have had my 2011 GMC Sierra for a few years now, i love it. i have hauled multiple loads of wood with the truck loaded too the max and a small trailer loaded to the max. can definitely feel the weight but my truck never hesitates at all. Very impressed with the performance of these trucks. i have worked at a ford dealership for years, but ill always drive a GMC.
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Reviews
GREAT VALUE - GREAT SERVICE - GREAT TRUCK
HONEST Abe owns and runs this dealership and is not your stereotypical used car guy. He makes promises and keeps them. He took care of the finer elements of a used truck purchase by making sure everything worked and looked good before we took it home. He also referred me to his audio guy and assured that I received excellent service at an excellent price. I got more than a used truck with Truck Kings, I also got access to their network of trusted professionals to modify and maintain it. I will buy my next truck from Abe again.
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
2016 GMC Sierra 1500 Denali
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Reviews
great people
I wish I could give them a 10 or more. We just bought a car the other day. Kyle and Shawn were both great people. Easy to talk to. They helped us out and finding the right deal for us. I can’t thank them enough. Super nice and super helpful. I now have a newer car and happy with what I got. They already looked at some issues and also they even fixed one issue in the spot before we even got approved they did everything we asked them to do. Thank you a 1000000 times for everything you guys did for my husband and I.
I've had the truck a month, and so far so good!
It's exactly what I was looking for; used but not too used, low miles, good looking but not too many bells and whistles, and didn't need any work.
Used
2014 GMC Sierra 1500 SLT
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Reviews
Bought a car finance, the whole process was very easy and
Bought a car finance, the whole process was very easy and the staff was very friendly. I love the car!
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
2015 GMC Sierra 1500 SLT
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Reviews
Fira at Sams Automotive
Had fantastic experience with Fira at Sams Automotive. No pressure and very accommodating. Fira is very professional and knowledgeable in answering all questions I had. I highly recommend working with Fira if you can.
Failed transmission and full replacement
We have owned our GMC Sierra 1500 for approximately 9 years now. The only real disappointment with the vehicle is that we had to have a full transmission replacement Just after the 100k mile without any warning whatsoever. The truck now has 107k miles on it and now , again out of nowhere, we are experiencing slipping in the trans and the engine light is now flashing. Very disappointing since we are starting to feel uncertain about the reliability of the vehicle now. The truck itself is gorgeous and shows ZERO signs of its age, sporting new rims and tires and a lifted body and no rust on the body at all. We hope there are no major issues with the engine as the vehicle has always been maintained as needed and on time for regular servicing at the dealership.
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Nice GMC Sierra 1500 Denali.
I really like my nw, to me, 2015 GMC Sierra Denali. The salesman, Terrance Lin was very efficient, helpful and courteous. Thank you very much.
Used
2016 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
Wonderful People
These guys were fantastic to work with. There was no pressure to buy. They were very helpful and honest people. It is a little weird to be buying a car at a bank, they are located inside a bank, but definitely worth it. I got a fantastic deal on a car that was perfect for my family. I was looking in a specific price range, I went out to see a few other cars that were around the same year, mileage and price as the one these guys had and by far this listing was the closest to what I saw in the car. Some had great pictures and raved about what was in the car and when I saw those cars, while they did contain those features listed they were in horrible condition. The posting from Northern was exactly what was there, if anything, the van was a bit better than the posting made it out to be. They were easy to work with and I loved the experience. I will certainly be looking here next time I purchase a car.
Big and Beautiful
I am a big fan of cupholders, this will make or break a deal for me. It could use more, but has a sufficient amount for the normal person. Beautiful body style and comfy.
Used
2015 GMC Sierra 1500 SLT
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Features
Reviews
The salesman was very helpful and went out of the way to
The salesman was very helpful and went out of the way to help me on this deal. I greatly appreciate his help. I would buy another vehicle from this location and not hesitate to recommend people their way. Again I thank Luis and the people at this location. Keep up the good work!
141,000 SLT Still Going Strong
SLT with most options. Purchased at 127k. Currently have 141k after 17 months of ownership. The tranny that came with it was not original. I have had to replace ball joints, a/c condenser, brakes, wheels, radiator, a battery and a starter. Can't complain at this mileage. This is one of the quietest vehicles I have owned (that includes Audi A8's) and it's shod with Cooper Discover AT3's that chomp through snow like my Toro snow thrower. I also replaced the stock halogen bulbs with LED's and what a difference! The interior is comfortable, and I did replace the drivers seat bottom cushion. The nav system sucks, it's not very intuitive and it isn't very good at mapping the best route. Besides, I use my sedan for long trips. Phone integration is a breeze. Radio surprisingly decent. Everything works as it should. It's easy to pop the kayaks in the bed and the ebikes on a carrier and head out for the weekend. When moving stuff, I have the 80" bed so I can fit loads of stuff under the hard tonneau cover. The interior still has NO squeaks or rattles. Amazing. The heated seats are slow to heat, and the heated wheel is slow to warm up. But this thing is such a beast in the snow and rain I don't want to drive anything else! All in all a very reliable, well-built, and for the genre a good-looking vehicle. People tell me all the time what a nice looking truck I have. It's stock. Thanks, GMC.
*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.
Compare the GMC Sierra 1500
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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.
