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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.






GMC Certified
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
We were very happy with the service we received from our
We were very happy with the service we received from our sales rep Isaac Ndalo, He was professional and attentive, He listened to what we needed and provided relevant information and options. The process was very transparent, Isaac was very patient and well informed giving detailed information on the type of car we wanted to purchase. The overall experience was great and we would recommend Isaac to anyone looking to purchase a vehicle. We left the GMC Reno lot feeling satisfied and confident in our purchase. Thank you Isaac & GMC for your great customer service.
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
Great car buying experience Tj,Scott and Chad were
Great car buying experience Tj,Scott and Chad were awesome thank you all for everything
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!!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Had a great time with Peter and definitely was easy.
Had a great time with Peter and definitely was easy. Will be back for another one
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.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
In my pursuit of a new truck I was taken care of.
In my pursuit of a new truck I was taken care of. Any question I had was answered, all the employees I talked to were friendly and helpful, and my main contact - Esbeyde - was excellent. Because of their consistency in taking care of me and my needs, Ray Chevrolet is my go to for any service or when I am ready for a new vehicle.
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
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.
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
My Wife and I went into Huntley Ford, we met with Joon he
My Wife and I went into Huntley Ford, we met with Joon he made us a great deal on a Bronco and got us in and out Quickly. Will go back to buy another Ford their.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Great
Always good service here. They always treat me with courtesy and respect.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I had made the mistake of scheduling a service
I had made the mistake of scheduling a service appointment at the Salisbury dealership but my appointment was at the Lexington dealership what a blessing it was they waited on me which they didn’t have to so glad they did they saw something the needed attention and took care of it I could go on and on but I want just saying they treated me better than I expected I will drive further to go there even if the other ones are closer






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Kaylee was awesome to work with she helped us right away
Kaylee was awesome to work with she helped us right away and found a truck in our price range it was quick and easy she also let us bring it by my dads house who is a retired technician for Chevy and he liked it as well






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Purchase of a certified Buick Regal
I live far from this dealership but they had exactly what I was looking for. The whole experience was very favorable . Everyone I has contact with was very professional and courteous. The salesman I worked with Joe Kendall was excellent. The day after the purchase I noticed that a light strip was missing on one of the outside mirrors. The service dept fixed it. In my opinion they are a top notch GM dealership . Keep up the good work😀






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
We are so grateful with our agent Mr.
We are so grateful with our agent Mr. Adam for he was so very helpful, patience and serve us with respect during our transaction at GMC. For this reason, we even recommended GMC Roseville to our friends, colleagues and family who are looking to either buy or trade in their auto because of superb customer service that we had received here. 1M thumbs up and star to Mr Adam and to all crew of GMC Roseville!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Professiona service advisor and quick service.
Professiona service advisor and quick service. I got in and out on a Saturday in under 90 minutes. Easy to a service appointment online with Toyota of Greenville. Steve Barton is a great advisor






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
From the time we took our test drive to the time we made
From the time we took our test drive to the time we made our purchase two days later Keith Jensen was professional yet personable, honest and accommodating. It was one of our best car purchasing experiences.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
We had a great experience from start to finish at Bill
We had a great experience from start to finish at Bill Luke! Steven was extremely helpful and Prost all times! We highly recommend this dealer and Steven! Thank you!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I saw your ad and would love to follow up.
I saw your ad and would love to follow up. Please get in touch with me.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
They went above and beyond to get me the vehicle I wanted
They went above and beyond to get me the vehicle I wanted I will do business with them again thank you Chase!!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Very good customer service.
Very good customer service. Prompt and courteous to contact me back after inquiring about a truck!! Very good experience!! Cade my salesman was very informative and knows his inventory well. Thanks again!






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
Bob @ Whitewater Motors My wife and I bought a used
Bob @ Whitewater Motors My wife and I bought a used Mercedes GLE 350 and were extremely happy. Bob is a man of his word, very easy to talk to and we thought we received a good value for our money.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I had an excellent experience working with Nabil at Elk
I had an excellent experience working with Nabil at Elk Grove Buick GMC ,from the moment I walked in ,they were very friendly , knowledgable and truly listened to what I was looking for in a vehicle ,he tool the time to answer all of my questions explain the feature f different models, and never made me feel pressured the entire process was snotty and stress free and I drove off feeling confident in my purchase if your looking for a great car buying experiences I highly recommended Nabil Ashofta .
GMC Sierra 3500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 3500 Denali | $71,301 | 7 Great deals |
2024 GMC Sierra 3500 Denali | $59,472 | 14 Great deals |
2023 GMC Sierra 3500 Denali | $47,999 | 13 Great deals |
2022 GMC Sierra 3500 Denali | $49,990 | 8 Great deals |
2021 GMC Sierra 3500 Denali | $47,919 | 51 Good deals |
2019 GMC Sierra 3500 Denali | $32,990 | 7 Great deals |
2018 GMC Sierra 3500 Denali | $33,900 | 21 Good deals |
2017 GMC Sierra 3500 Denali | $31,441 | 7 Good deals |
2016 GMC Sierra 3500 Denali | $23,945 | 11 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 $56,714, with pricing starting at $39,990.
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
4 Great Deals out of 28 listings starting at $35,999
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