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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
2020 GMC Sierra 3500 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 Base
Vehicle information
Features
Reviews
Transaction was great and employees were very patient and
Transaction was great and employees were very patient and professional! Thank you so very much!
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.






GMC Certified
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I am so impressed and appreciative of the service team
I am so impressed and appreciative of the service team here. Yes, it can take a long time to get an appointment - depending on what you need done, but the last two times I've brought my truck in for service, they fixed things the other auto shop repaired incorrectly, helped get me to and from the car rental place, and had exceptional communication before, during and after. Their staff is friendly and professional and I trust the work that's done, is done correctly.
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 Base
Vehicle information
Features
Reviews
Great old fashioned way of doing business.
Great old fashioned way of doing business. Professional, smooth, non-rushed atmosphere. Mr. Paul Macchi is a great, concientious employee. I thank him for his courtesies and cordiality.
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
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!
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 AT4
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
Best dealship ever!
Best dealship ever! I highly recommend whether you have questions, are in the market to buy, or have you vehicle serviced. Stop by and see for yourself.






Used
2020 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Used car purchase
Jeff B was professional, personable, considerate and everyone from start to finish did an amazing job, I am excited to be in a newer vehicle and the ease of the buying process was wonderful, so far a great experience, thank you.






Used
2020 GMC Sierra 3500 SLT
Vehicle information
Features
Reviews
excellent service buying my new tahoe.
excellent service buying my new tahoe. was great doing business here treated very good. would recommend to everyone . will be back when we need another one






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
Bryan was a great help in selling my vehicle he had great
Bryan was a great help in selling my vehicle he had great customer service will definitely be back when I want to purchase a vehicle






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 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!






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
Took my 2023 Silverado in for a recall to Service
Took my 2023 Silverado in for a recall to Service department and they were able to get me in and out sales department very accommodating working with you






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I was in the market for an Acura MDX and found one
I was in the market for an Acura MDX and found one (certified) on Beaver Chevrolet website for a very competitive price. I called and got Rich King in sales and am so thankful that he picked up the call. He was personable, professional, informed, and a straight shooter!! I told him the vehicle I was interested in and the specifics (money down, monthly payment etc) I needed to make it work. He went over the car fax w me and I put a deposit on it to hold as sold. I live 2.5 hours away and explained I would be disappointed if I drove all that way based on inaccurate information. I got there and he had the vehicle detailed and ready for my test drive…and everything was exactly as he said. Goto Beaver Chevrolet and ask for Rich King!! You won’t be disappointed. 😎






Used
2020 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Natalia was very helpful and professional in helping me
Natalia was very helpful and professional in helping me get the dream truck i always wanted






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Very easy.
Very easy. Found the car I wanted on line at a good price and the financing I wanted.






Used
2020 GMC Sierra 3500 SLT
Vehicle information
Features
Reviews
Having sales rep Jake Beam work with me for the third
Having sales rep Jake Beam work with me for the third Toyota buying experience, made me realize how lucky I have been. Jake is professional, efficient, extremely well organized and make purchasing the coveted Toyota vehicles a comfortable and pleasant experience . In my opinion Jake is definitely an asset to Landers Toyota, and will advance with opportunities.




Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Service oil change and new tires.
Good experience They help with my tire problem that the other tire shops in town could not seems not able to fix even though I took it back to them several times.






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.
GMC Sierra 3500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 3500 | $43,821 | 11 Great deals |
2024 GMC Sierra 3500 | $39,988 | 26 Great deals |
2023 GMC Sierra 3500 | $42,795 | 21 Great deals |
2022 GMC Sierra 3500 | $34,999 | 31 Great deals |
2021 GMC Sierra 3500 | $13,795 | 8 Great deals |
2019 GMC Sierra 3500 | $29,674 | 6 Great deals |
2018 GMC Sierra 3500 | $21,800 | 37 Good deals |
2017 GMC Sierra 3500 | $26,999 | 7 Great deals |
2016 GMC Sierra 3500 | $14,900 | 10 Great deals |
About the 2020 GMC Sierra 3500
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 cost?
The 2020 GMC Sierra 3500 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 3500 is $54,396, with pricing starting at $29,987.
Is the 2020 GMC Sierra 3500 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 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
AT4 (2 styles)
Style | |
---|---|
4WD Crew Cab 159" AT4 | 4WD Crew Cab 172" AT4 |
Inventory price | |
Starting at $59,500 | Starting at $59,700 |
Combined MPG | |
0 | 0 |
Engine | |
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) |
Base (8 styles)
Style | |||||||
---|---|---|---|---|---|---|---|
2WD Reg Cab 142" | 4WD Reg Cab 142" | 2WD Double Cab 162" | 4WD Double Cab 162" | 4WD Crew Cab 159" | 2WD Crew Cab 172" | 2WD Crew Cab 159" | 4WD Crew Cab 172" |
Inventory price | |||||||
Starting at $37,000 | Starting at $39,800 | Starting at $39,800 | Starting at $42,600 | Starting at $44,200 | Starting at $41,600 | Starting at $41,400 | Starting at $44,400 |
Combined MPG | |||||||
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Engine | |||||||
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) |
Denali (2 styles)
Style | |
---|---|
4WD Crew Cab 172" Denali | 4WD Crew Cab 159" Denali |
Inventory price | |
Starting at $65,700 | Starting at $65,500 |
Combined MPG | |
0 | 0 |
Engine | |
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) |
SLE (8 styles)
Style | |||||||
---|---|---|---|---|---|---|---|
4WD Crew Cab 172" SLE | 2WD Crew Cab 172" SLE | 4WD Crew Cab 159" SLE | 2WD Crew Cab 159" SLE | 4WD Reg Cab 142" SLE | 2WD Reg Cab 142" SLE | 4WD Double Cab 162" SLE | 2WD Double Cab 162" SLE |
Inventory price | |||||||
Starting at $48,400 | Starting at $45,600 | Starting at $48,200 | Starting at $45,400 | Starting at $44,400 | Starting at $41,600 | Starting at $46,600 | Starting at $43,800 |
Combined MPG | |||||||
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Engine | |||||||
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) |
SLT (4 styles)
Style | |||
---|---|---|---|
2WD Crew Cab 172" SLT | 4WD Crew Cab 172" SLT | 4WD Crew Cab 159" SLT | 2WD Crew Cab 159" SLT |
Inventory price | |||
Starting at $54,200 | Starting at $57,000 | Starting at $56,800 | Starting at $54,000 |
Combined MPG | |||
0 | 0 | 0 | 0 |
Engine | |||
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) |
*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.
Research the 2020 GMC Sierra 3500
Compare the 2020 GMC Sierra 3500
GMC Sierra 3500 trims
-
GMC Sierra 3500 2020 Denali
10 Great Deals out of 102 listings starting at $40,995
-
GMC Sierra 3500 2020 Base
6 Great Deals out of 30 listings starting at $29,987
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