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Used
2020 GMC Sierra 2500 AT4 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 2500 AT4
Vehicle information
Features
Reviews
From start to finish.
From start to finish..everything was great..Great sales team and a great GM..enjoyed every minute..want a fun and down to earth experience?..Trust Serra Chevrolet!
2020 GMC 2500 AT4
This truck is the truck that all others should look up to. It rides great, will tow a house, runs smooth, and gets great fuel economy. The Allison transmission is so smooth. The AT4 looks great too.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Brought my car in for a service issue and everyone was
Brought my car in for a service issue and everyone was helpful and communicated during the process. Always have had good service every time I have need work done.
Best truck I've owned yet
What a gorgeous truck, runs good, sounds good and has all of the amenities I need although I am looking forward to their next interior upgrade.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
I purchased a Ford Lariat yesterday and everyone at the
I purchased a Ford Lariat yesterday and everyone at the dealership has been extremely helpful and nice. The pickup was very clean and full of gas!
Most convenient options on any vehicle I've owned.
Great power and yet great economy. Love the safety features with the cameras and side vehicle warning. Camera that shows side of vehicle, including trailer when turn signal is on is great. Also appreciate the bed camera for hooking up gooseneck trailer.






Used
2020 GMC Sierra 2500 AT4
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
This is your Truck
When looking at price point vise equipment, This is your truck. I looked at every 2500/3500 on the market, same vehicle equipment and price. I chose the Duramax.. HP, Torque of this Diesel, truck equipment that the SLT price point had everything that I wanted for safety, appearance and comfort, none other came close. This is your truck...






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
I recently purchased a 2025 Honda HR-V Sport from Corwin
I recently purchased a 2025 Honda HR-V Sport from Corwin Honda, and I want to give special recognition to Morgan Holt. From start to finish, Morgan made the process smooth, straightforward, and stress-free. Even when I had concerns or felt uncertain, Morgan went above and beyond to make sure I got into the right vehicle and felt confident about my purchase. He stayed responsive, professional, and genuinely cared about getting me taken care of—even following up with me regarding my loan documents. What stood out most was Morgan’s commitment to customer service. He didn’t just sell me a car; he made sure the entire experience was positive and that I left feeling supported. It’s rare to find someone this dedicated in sales, and I absolutely commend him for it. If you’re looking to buy a vehicle, I highly recommend asking for Morgan Holt—you won’t regret it.
So far have loved my 2020 2500 HD 4x4 diesel
I have owned my truck for a month and two weeks. Two weeks after owning it my power steering went out for about 25 miles then was OK again. Last week the check engine light went on and after about 25 miles it turned off and it was OK a week ago I entered my truck to start off for the day and everything was dead absolutely had no sign of life. The dealership has now had it for exactly a week and they cannot figure out what’s going on. They say they’re having problems receiving communicating. I sure hope I will continue to love my truck. It drives like a dream and pulls like an ox.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Jenny Rose is the best service advisor that we?
Jenny Rose is the best service advisor that we?ve ever had. She made sure that all repairs were completed thoroughly and quickly. We will continue to get our Tahoe serviced here.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
The sales associate Shayla was friendly, knowledgeable
The sales associate Shayla was friendly, knowledgeable and professional. The test drive of the vehicle was informative






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Kevin was amazing!
Kevin was amazing! He wasn’t pushy and made looking and buying a car fun again. #1 salesmen in my books. Bridgeland and Candy Cars had a variety of Wranglers that were quality cars. Kevin also had the Jeeps I wanted to test drive waiting right up front for me! Once I bought my Wrangler, it was serviced, inspected and cleaned waiting for me upfront. I’d do business with them again.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Overall Great Experience from start to finish.
Overall Great Experience from start to finish. Elder and Ralphie communicated with us every step of the way and made the process of buying our car seamlessly. They both were friendly and professional. I would definitely recommend Stream Auto outlet in Islip if you’re looking for a great selection and team. Mark & Jenny






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Sell car and transport car to my address $9000 detail,
Sell car and transport car to my address $9000 detail, AC, battery, too liner, sevice






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
great people great service no problem so far i would buy
great people great service no problem so far i would buy there again thanks for the thousand dollar price cut






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
CJ was the deciding factor ,made my purchase worth the
CJ was the deciding factor ,made my purchase worth the 400 mile trip to purchase the Ram






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Nick and Chase were great to deal with.
Nick and Chase were great to deal with. Straight shooters and pressure free. One of the best ecperiences I have ever had purchasing a vehicle.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
This was absolutely the best truck buying experience
This was absolutely the best truck buying experience we've ever had. Our salesman Brandon was very professional and made my wife and I very comfortable A very pleasant experience. Will definitely refer anyone to your dealership. Thanks again






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Ashley did a great job going over everything.
Ashley did a great job going over everything. Answered questions we had. Pleasant to work with.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Brandon was great through the whole process.
Brandon was great through the whole process. Hassle free and great customer service. thanks Brandon!!






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
They treated us well...I would really recommend t
Our Chevy equinox stopped running...we didn't buy it from Mora Chevrolet...we got to their dealership and they scanned it and found the issue and fixed it in less than 45 minutes...and they were gracious and kind....lovely people...great service....thanks Mora Chevrolet....you are tops..Jerry and Joy Novak
GMC Sierra 2500 prices by year
Model year | Prices from | Deals |
---|---|---|
2026 GMC Sierra 2500 AT4 | $67,335 | |
2025 GMC Sierra 2500 AT4 | $65,195 | 20 Great deals |
2024 GMC Sierra 2500 AT4 | $50,995 | 10 Great deals |
2023 GMC Sierra 2500 AT4 | $49,998 | 11 Great deals |
2022 GMC Sierra 2500 AT4 | $32,995 | 22 Great deals |
2021 GMC Sierra 2500 AT4 | $36,998 | 10 Great deals |
About the 2020 GMC Sierra 2500 AT4
AT4 shown.
- Seating
- 5
- Door count
- 4
- Drivetrain
- Four 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 2500 AT4 cost?
The 2020 GMC Sierra 2500 AT4 price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 2500 AT4 is $53,872, with pricing starting at $32,500.
What are some similar vehicles and competitors of the 2020 GMC Sierra 2500 AT4?
The 2020 GMC Sierra 2500 AT4 compares to and/or competes against the following vehicles:
Is the 2020 GMC Sierra 2500 AT4 reliable?
The 2020 GMC Sierra 2500 has an average reliability rating of 4.7 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 2500 owners.
91% of drivers recommend this car
- Comfort 4.9
- Interior 4.9
- Performance 4.8
- Value 4.5
- Exterior 4.9
- Reliability 4.7
AT4 (2 styles)
Style | |
---|---|
4WD Crew Cab 172" AT4 | 4WD Crew Cab 159" AT4 |
Inventory price | |
Starting at $58,500 | Starting at $58,300 |
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) |
*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 2500 trims
-
GMC Sierra 2500 2020 Denali
4 Great Deals out of 161 listings starting at $37,000
-
GMC Sierra 2500 2020 SLT
5 Great Deals out of 41 listings starting at $27,000
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