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Used
2020 GMC Sierra 3500 Denali trucks
for sale
near me
- 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
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Treated like family. Done right the first time.
The service this dealership stands behind is the best of the best. We were treated like family and received top notch service that went above and beyond our expectations. Buying a car is one thing, but having a dealership treat you so well AFTER the sale for the life of the car is what matters most. I trust Jason and Gainesville Buick, and you should too if you want things done right the FIRST time.
Great Diesel truck when emission sensors work
Great vehicle for pulling my fifth wheel RV which weighs around 20,000 pounds. This dually truck pulls the RV very nicely without any significant strain on the engine or the transmission. However, like all of today's diesel engines there are 4 different system of emissions on this truck. Each one of these emission systems has sensors associated with them. If one of these sensors goes bad the truck will not perform optimally and sometimes it will go into the limp mode. Unfortunately this is not unique to GMC trucks. All manufacturers are battling this system. Also, I have had to take the truck to the dealer for computer upgrades in order to improve performance. I wish these upgrades could be performed on line (through wifi or with my own phone service). It sure would make things a lot simpler and improve the through put of the dealers who are already strained because of the limited number of available diesel mechanics.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
We worked with Serjio Verduzco at Blade Chevrolet and
We worked with Serjio Verduzco at Blade Chevrolet and purchased a 2025 Equinox. I owned an Outback and was looking for a more comfortable car. Serjio was extremely helpful and low pressure in approach. He worked with me on pricing until we had a deal both of us were comfortable with. He was very accessible, knowledgeable and inspired confidence that I had made the right decision. At signing, Steve was also easy to work with and accommodating. I highly recommend Serjio Verduzco and Blade Chevrolet for your next auto purchase. And I love my Equinox!
Great car for work!!
Comfort, ease of driving, style, convenient for work and we LOVE the tailgate! Great for towing our heavy fifth wheel and our dogs are riding in style!!






Certified
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Cameron has great customer care/service
Cameron at Larry miller ford was so kinda and made sure there was no funny business with the purchase of my new Bronco. I will definitely be buying all my vehicles from LHM Ford very happy!!
Great luxury ride with great pulling capabilities.
The Texas Edition combined with the X31 package and premium SLT makes a very nice combination. The Sierra 3500HD gives you a luxury interior and ride with all the capabilities of a great pulling truck. The Duramax is quiet yet powerful. It is no doubt the best of trucks for 2020.






GMC Certified
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Great experience and service from sales.
Great experience and service from sales. I?m a repeat buyer from this dealership. Always a god experience with this sales group. Purchased and new truck. Thank you.
Really impressed with the performance
Nicest truck I have ever owned preforms great with my RV Truck is comfortable and still works great when you need it to preform. Ride is nice and very roomy for all that want to travel with me






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
We were so very fortunate to happen along to Alan King.
We were so very fortunate to happen along to Alan King...and he was great to work with. Would recommend him to anyone we know (or don't know!) to help with finding the car or truck of your dreams!
Good power very comfortable ride
Good power plenty of room the truck has all kind of new technology in it that helps with driving safety and with job performance Awesome






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
We had a fantastic experience, Everyone was very nice We
We had a fantastic experience, Everyone was very nice We purchased a new outlander and just love it Ray and the entire team were great Highly recommend!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Great.place!
Kristen in the service department was very thorough, friendly, great personality. I spoke to "Gator" from service several times and he was always helpful, patient and courteous. Great place!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I recently purchased a 2025 Chevy Traverse, and I
I recently purchased a 2025 Chevy Traverse, and I couldn't be happier with the outstanding service I received from the team at Courtesy Chevrolet. From start to finish, the experience was exceptional!!! Jackson, my sales person, was incredibly knowledgeable and attentive. He took the time to understand my needs and preferences, ensuring that the Traverse was the perfect fit for me. His expertise and friendly demeanor made the buying process smooth and enjoyable. Miguel in finance was a true professional, guiding me through the financing options with ease. He made sure I understood every detail and helped customize a plan that worked best for me. Miguel's commitment to customer satisfaction was evident in every interaction. Jessie in parts and accessories went above and beyond to help me personalize my new vehicle. His suggestions were spot-on, and she ensured that everything was ordered and installed promptly. Overall, the team at Courtesy Chevrolet exceeded my expectations with their excellent service and attention to detail. I highly recommend them to anyone in the market for a new vehicle. Thank you to Jackson, Miguel, and Jessie for making my purchase a memorable and pleasant experience!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Dvonte Muhammad reach out to me & his manager helped me
Dvonte Muhammad reach out to me & his manager helped me get my credit and truck fast very friendly as well . Definitely recommended






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
That time again!
Loved working with Brandon Hamilton and his GM. Hope to work with you in the future!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Bought a car from Tripp Ellis at Walser Polar Chevrolet
Bought a car from Tripp Ellis at Walser Polar Chevrolet last week. We had a wonderful experience. He’s personable, polite, and made the whole experience fun and stress free. Definitely recommend!






Certified
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Bought a used 2018 F150
Sherry was easy to work with and made buying my truck hassle free. I would recommend this team to anyone.





Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Excellent service, even after the sale
I bought an LX 570 from out of state, and I had an excellent experience. Vinny was my salesman, and he was very helpful throughout the process. After the sale, they noticed a dent on the hood when the vehicle was getting loaded up to ship to me. They contacted me to apologize that they had not noticed it before, and they told me to get it fixed and it would be on them! I had not even asked about dents! When I got the LX it was beautiful. However, I noticed that the owner's manual was missing. When I contacted Vinny, he said they would get one shipped out to me. In short, excellent service, even after the sale. I would definitely buy from them again.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I contacted Luther Cadillac thru Cars.
I contacted Luther Cadillac thru Cars.com. A representative contacted me within a few mins but I changed my mind about the car and didn't have any more contact with this dealer.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
So happy with our Honda Pilot purchase
After many days of searching for a vehicle, we finally found a quality SUV at a fair price at Sunset Auto Wholesale in Tacoma. I definitely would recommend this dealership. Tryston helped us through the process and made it stress-free. From start to finish, the staff was great.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Aryan was a very helpful salesman gave me many options
Aryan was a very helpful salesman gave me many options and compared all of them one by one so it made my first car buying experience easy.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Mason Constable went above and beyond to quickly close
Mason Constable went above and beyond to quickly close our deal and get us on our way. He was responsive to my messages and texts and went out of his way to answer our questions. It was worth the two hour drive to get to the dealership!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I live in another state and this was my first experience
I live in another state and this was my first experience buying a car without driving it first. Very pleased with my car. Thank you Ryan for all your help in making this happen. Service was amazing.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I hade a Great experience at this dealership , Thank you
I hade a Great experience at this dealership , Thank you Dylan for makeing my dreams come true. and to the finance depatment Freddy who made it very easy and fast, Icould not of had a better experience. I truly recommened Diamond Chevrolet Banning.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Smoothest car buying experience I've ever had, highly
Smoothest car buying experience I've ever had, highly recommend going to see Mariah Lange. She helped me out with picking out the exact truck i wanted and also with financing. Couldn't ask for a better!
GMC Sierra 3500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 3500 Denali | $74,714 | 15 Good deals |
2024 GMC Sierra 3500 Denali | $62,872 | 5 Great deals |
2023 GMC Sierra 3500 Denali | $49,999 | 11 Great deals |
2022 GMC Sierra 3500 Denali | $51,999 | 9 Great deals |
2021 GMC Sierra 3500 Denali | $40,950 | 9 Great deals |
2019 GMC Sierra 3500 Denali | $28,500 | 5 Great deals |
2018 GMC Sierra 3500 Denali | $27,725 | 5 Great deals |
2017 GMC Sierra 3500 Denali | $21,998 | 10 Good deals |
2016 GMC Sierra 3500 Denali | $29,995 | 14 Good deals |
About the 2020 GMC Sierra 3500 Denali
Base shown (base trim).
- Seating
- 2
- Door count
- 2
- Drivetrain
- Rear-wheel drive
- Combined MPG
- 0
- Transmission
- 6-Speed A/T
- Engine
- 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)

How much does the 2020 GMC Sierra 3500 Denali cost?
The 2020 GMC Sierra 3500 Denali price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 3500 Denali is $56,285, with pricing starting at $41,850.
What are some similar vehicles and competitors of the 2020 GMC Sierra 3500 Denali?
The 2020 GMC Sierra 3500 Denali compares to and/or competes against the following vehicles:
Is the 2020 GMC Sierra 3500 Denali reliable?
The 2020 GMC Sierra 3500 has an average reliability rating of 4.9 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 3500 owners.
Is the 2020 GMC Sierra 3500 Denali a good truck?
Below are the Cars.com consumer ratings for the 2020 GMC Sierra 3500.
- Comfort 4.9
- Interior 4.9
- Performance 4.9
- Value 4.7
- Exterior 5.0
- Reliability 4.9
100% of drivers recommend this car
- Comfort 4.9
- Interior 4.9
- Performance 4.9
- Value 4.7
- Exterior 5.0
- Reliability 4.9
*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.
GMC Sierra 3500 trims
-
GMC Sierra 3500 2020 Base
3 Great Deals out of 22 listings starting at $40,000
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