Save your search and get notified when new inventory arrives.
Contact seller
Customize your budget
*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.
About your privacy: Cars.com is asking for your ZIP and credit rating because it helps us to make an educated guess at your sales tax and loan interest. These two factors can greatly change your monthly payment.
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.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Quick and Efficient Service
Repair and service was very fast Personnel were very courteous
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 Base
Vehicle information
Features
Reviews
A big thank you to Dom, Heather, and the financing team
A big thank you to Dom, Heather, and the financing team at Star Of Quakertown. They made my car buying experience just wonderful. They went above and beyond to get me my vehicle and I'm so happy with it. Even thought they were an hour and a half away from me, they were just awesome. Very welcoming and I definitely recommend them. I'd drive another hour and a half to get another vehicle from them. Great job guys! Keep up the great work!!
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
Fantastic dealership, highly recommend, They do a great
Fantastic dealership, highly recommend, They do a great job! getting you what you want at the best price,
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
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
2 months ago I went into Cortez Auto Sales in Burlington
2 months ago I went into Cortez Auto Sales in Burlington Washington, The following day I picked up my 2021 Camaro... A couple months prior to meeting Derek and Johnny at Cortez Auto Sales I had purchased a vehicle down south that left me discouraged of all dealerships it was a horrific experience but within the first half hour of talking with Derek and Johnny I felt at ease, I had been car shopping on and off for 5 or 6 months, both Johnny and Derek went above and beyond they the whole priced, 2 months later they are still taking care of any of my question and concerns, when I test over the car they let me take it by myself they told me take as long as I needed to make sure I liked it or until I knew I liked it or until I knew I didn't want it, a couple weeks after having the car I came out of work and I had a flat tire, I called Cortez they put brand new tires on it they are awesome, Cortez is not only the only review I've wrote but it's the good review I've wanted to write😋 way to go Bobby and Derrick...Thank you for getting me into my dream car...I LOVE Y'ALL AT CORTEZ...
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
Painless purchase
Purchased a Sierra 1500. Working with James in finance and Russ in sales made it a breeze. Very friendly and knowledgeable staff. Worth the drive.






Vehicle information
Features
Reviews
Amazing to have such an easy purchase
They were amazing ! I was so happy with my purchase !! Perfect car for my daughter Low mileage and great price! Great staff and made me feel confident in making my purchase.






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
If you are in the market for a car I would highly
If you are in the market for a car I would highly recommend DC Motors. My experience with the DC Motors team (Derek, Chris, and Jay)was excellent! They were responsive and answered all my questions. They were friendly and knowledgeable. My car purchasing experience with DC Motors was five stars!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Worked with JT and Max for the purchase of a 2020 GMC
Worked with JT and Max for the purchase of a 2020 GMC Acadia. We went in with a set monthly payment idea and they worked with us until we got to where we wanted to be. 10/10 customer service experience! Even if things wouldn’t have worked in our favor, we would have left knowing they did everything they could and actually care for their customers! Highly recommend!






Used
2020 GMC Sierra 3500 SLT
Vehicle information
Features






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Very prompt and kept me updated while I was waiting on my
Very prompt and kept me updated while I was waiting on my vehicle. Asked if I needed anything else. Always polite.Got an appointment for the very next day when i called to schedule.






Used
2020 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Very good overall experience.
Very good overall experience. My salesman Harry was very friendly and knowledgeable. The whole purchase went through smoothly. The couple of minor issues (as it was a used vehicle) were taken care of by the service department and it was ready for pickup on time. Thanks guys!






Used
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Nice vehicles, good pricing and easy to dela with!
Nice vehicles, good pricing and easy to dela with! The were able to get our payments where we wanted them to be






Certified
2020 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Very nice dealership
Josh Nussbaum was my sales person very nice and pleasant after I found the truck I wanted he made sure everything was easy and simple for me. He also made sure Fordpass was all set up and ready before I left.






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.






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
The service advisor is professional, competent, and
The service advisor is professional, competent, and personable. Oil change and tire rotation was completed in a timely manner. Very satisfied with this service. Cost is in line with competitors.






GMC Certified
2020 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Worked with a young man named Noah who was friendly,
Worked with a young man named Noah who was friendly, patient, and worked hard to help us get the car for us, but no pressure sales tactics. Got a better car than I went in to buy in the first place. The whole team of people were great actually. Very welcoming and accommodating. I would definitely recommend this place for your next vehicle!






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
Dylan was very helpful, patient, and not pushy at all.
Dylan was very helpful, patient, and not pushy at all. He was in constant communication with me until we came to an agreement. He worked with me to get the price that I felt was justifiable. H&K was willing to negotiate and compromise.
GMC Sierra 3500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 3500 | $46,440 | 20 Great deals |
2024 GMC Sierra 3500 | $38,988 | 38 Great deals |
2023 GMC Sierra 3500 | $39,999 | 20 Great deals |
2022 GMC Sierra 3500 | $30,999 | 32 Great deals |
2021 GMC Sierra 3500 | $13,795 | 7 Great deals |
2019 GMC Sierra 3500 | $21,985 | 8 Great deals |
2018 GMC Sierra 3500 | $21,000 | 6 Great deals |
2017 GMC Sierra 3500 | $25,999 | 11 Good deals |
2016 GMC Sierra 3500 | $14,900 | 7 Great deals |
*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.
Similar Cars
-
Chevrolet Silverado 2500 for sale
131 Great Deals out of 513 listings starting at $12,795
-
Chevrolet Silverado 3500 for sale
25 Great Deals out of 156 listings starting at $22,999
-
Ford F-350 for sale
43 Great Deals out of 251 listings starting at $16,980
-
Ford F-450 for sale
6 Great Deals out of 54 listings starting at $22,995
-
GMC Sierra 2500 for sale
22 Great Deals out of 304 listings starting at $21,998
-
RAM 3500 for sale
19 Great Deals out of 161 listings starting at $27,399
Research the 2020 GMC Sierra 3500
Compare the 2020 GMC Sierra 3500
GMC Sierra 3500 trims
-
GMC Sierra 3500 2020 Denali
22 Great Deals out of 97 listings starting at $37,990
-
GMC Sierra 3500 2020 Base
5 Great Deals out of 26 listings starting at $34,499
2020 GMC Sierra 3500 by body style
2020 GMC Sierra 3500 by fuel type
- ${price_badge()}
- ${ami_badge()}
- ${battery_badge()}${ev_report_link()}
- ${hot_car_badge()}
- ${award_badge()}
- ${cpo_badge()}
${price_badge_description}
${ami_badge_description}
The EV Battery Rating is based on this vehicle's current expected range relative to the vehicles expected range when new. ${battery_badge_text}
Certified cars are manufacturer warrantied and typically go through a rigorous multi-point inspection.
This car is likely to sell soon based on the price, features, and condition.
${award_blurb}
${award_two_blurb}