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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 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
Just bought a WRX and had Sam (Cool hair) as my salesman
Just bought a WRX and had Sam (Cool hair) as my salesman and it was super fast and easy!
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
I felt leaving with bo stone un turned and top quality
I felt leaving with bo stone un turned and top quality service. They were fast and no doubt everything was done to highest standard. I will only go to the dealer for repairs
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 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.
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
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
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
Great people to do business with.
Great people to do business with. Nice and friendly and got a good deal on a new GMC pickup I am glad I made the drive to Baxley Georgia
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
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 atmosphere - Worked with Thai.
Great atmosphere - Worked with Thai. He made a good sale very knowledgeable . Thank you for helping me purchase my wonderful sierra. Wonderful facilities as well and great service.





Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Victoria was amazing.
Victoria was amazing. Victoria was amazing and took care of me and my needs. Victoria was amazing and took care of me and my needs.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
I texted with Anthony and we were able to quickly make a
I texted with Anthony and we were able to quickly make a deal. Easy to work with, would recommend!






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Kevin Berry did an excellent job as always and
Kevin Berry did an excellent job as always and communicated the results clearly. Logan Carney did a very good job with updates on progress and status of when the car would be ready.






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
Reviews
Excellent overall experience
I was truly impressed with my service. They were professional, courteous, and knowledgeable. My vehicle was repaired in one day. I will use this company again.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Service
Excellent staff from service center to owner, we have nothing but praise for this dealership! ??????????






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
So nice and friendly.
So nice and friendly. These guys reminded me of an oil change that was coming up (totally forgot about) and helped me order/install the nicest rain guards on my car. Looks perfect! Answered all my questions too. So personable and very quick. The Boise community feel is here!






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
We recently purchased a vehicle from Corwin Ford and
We recently purchased a vehicle from Corwin Ford and had a great experience overall. Our salesman, Brian, was fantastic—friendly, helpful, and really listened to what we were looking for. He made the process easy and enjoyable, and we truly appreciated his patience and professionalism. We’re very happy with our purchase and grateful for the great customer service we received from Brian. We would definitely recommend Corwin Ford, especially if you get the chance to work with Brian.






GMC Certified
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
My husband and I recently visited Ferguson Subaru and
My husband and I recently visited Ferguson Subaru and purchased a 2025 Subaru Touring. We love it, this is probably our 6th Subaru. The outbacks drive so well . Our touring is loaded with so many nice features. We were set up with Zane to explain all of the functions. Our salesman Juvi was great , with several outbacks to choose from. Juvi thanks for helping us make our decision. Juvi thanks again for your help.






Used
2020 GMC Sierra 2500 AT4
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 2500 AT4
Vehicle information
Features
Reviews
Thank you so much RYAN STEPHENS for all your help today.
Thank you so much RYAN STEPHENS for all your help today. You were very professional and knowledgeable and polite. I will go no where else to purchase another vehicle! W O W!! Yes I was WOWed! M.A.Q.






Used
2020 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
I knew what I was looking for and got to test drive as
I knew what I was looking for and got to test drive as soon as the vehicle showed up at the lot. Salesman and manager helped me move things along without any issues. I got reasonable value from my trad-in and I'm looking forward to picking up my new to me Expedition next week!
GMC Sierra 2500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 2500 AT4 | $67,939 | 17 Great deals |
2024 GMC Sierra 2500 AT4 | $58,495 | 263 Good deals |
2023 GMC Sierra 2500 AT4 | $51,900 | 7 Great deals |
2022 GMC Sierra 2500 AT4 | $35,713 | 20 Great deals |
2021 GMC Sierra 2500 AT4 | $37,396 | 61 Good deals |
About the 2020 GMC Sierra 2500 AT4
Base shown (base trim).
- Seating
- 3
- 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 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 $54,853, with pricing starting at $39,993.
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.
Is the 2020 GMC Sierra 2500 AT4 a good truck?
Below are the Cars.com consumer ratings for the 2020 GMC Sierra 2500.
- Comfort 4.9
- Interior 4.9
- Performance 4.8
- Value 4.5
- Exterior 4.9
- Reliability 4.7
91% of drivers recommend this car
- Comfort 4.9
- Interior 4.9
- Performance 4.8
- Value 4.5
- Exterior 4.9
- Reliability 4.7
*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
8 Great Deals out of 156 listings starting at $38,491
-
GMC Sierra 2500 2020 SLT
3 Great Deals out of 29 listings starting at $35,196
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