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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 SLT 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 SLT
Vehicle information
Features
Reviews
Great service, professional, courteous, easy to deal
Great service, professional, courteous, easy to deal with, flexible with scheduling. Willing to accommodate me. Donna, Jerry and Ken. What a team!
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 SLT
Vehicle information
Features
Reviews
Pretty good oil change might go back for another one
Pretty good oil change might go back for another one highly recommend it to others
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 SLT
Vehicle information
Features
Reviews
Jaylyn and the stuff were just amazing.
Jaylyn and the stuff were just amazing. I just love them all? Wait time was spot on. I will always pick this store for all my services for my car.
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 SLT
Vehicle information
Features
Reviews
Very helpful, efficient and timely, everyone was
Very helpful, efficient and timely, everyone was professional, not pushy like other dealers and explained everything in detail
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 SLT
Vehicle information
Features
Reviews
Amazing dealership.
Amazing dealership. We’re very professional and courteous. From start to finish they truly went all out. My family and I will be regulars as long as they don’t change the way they operate.
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 SLT
Vehicle information
Features
Reviews
The staff was very knowledgeable and not pushy.
The staff was very knowledgeable and not pushy. It was a good buying experience. We would highly recommend this dealership if you are looking for a new or used car.






Used
2020 GMC Sierra 2500 SLT
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.






Certified
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Came in for a factory recall fix.
Came in for a factory recall fix. Was taken care of quick. Megan was great, friendly, and great customer service. Will keep coming back to Maxwell Ford.






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Very Good Experience.... accept
Bought a 2015 Dodge Challenger with 5800 miles - great price compared with what the same car is going for today with 40K / 50K more miles. Process was easy. All my friends love the cards and strangers give me compliments. My only complaint was these cars go through an inspection where all problems are fixed. I bought the car in February and by the Summer when I finally turned on the A/C, it did not work. When I went to the repaair shop I was told it would cost me 41000.00 dollars as the hose was broken dehind the instrument panel. In my opinion this should have been caught by CARMAX and fixed before I picked up the car. Otherwise very happy - no problems other than that to date. CARMAX - please fix my A/C??????






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
I just purchased my second Ford from Chaparral Ford in
I just purchased my second Ford from Chaparral Ford in Devine Texas. Richard Burwell was may Sales Consultant and he was great. This was the best experience I have ever had buying a new vehicle. The entire staff at Chaparral, to include Sales, Parts, and Service departments all provided unequaled customer service. Zach Morris, the General Manager, personally met with me to make sure I was receiving the best possible customer service. I received a great deal that other dealerships could not even come close to matching. I highly recommend Chaparral Ford for your next vehicle purchase. I believe it will be the best car buying experience you will ever have.






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Fantastic!
Fantastic! This was my first car, Jorge was my sales man, he explained everything in detail. Had a wonderful experience!






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Great Experience.
Great Experience. I appreciate that they gave me several options and worked with me to find what works.






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
I cannot recommend this location enough after the
I cannot recommend this location enough after the excellent service and very good experience I had with my first time financing a vehicle. Cesar Rodriguez and Raul Silva both worked with me to find a vehicle that suited my needs within my price range. These gentleman were extremely patient and professional when handling the sale. I would also like to thank Mark and Brandon in financial services. They both persisted through technical difficulties in order to deliver excellent customer service all the way to the end. I would absolutely recommend this location if you’re in the market for a used vehicle and I will be returning in the future!






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Rodney is amazing!
We cannot say enough about the wonderful job that Rodney does. He helped us purchase our Mach-E and has continued to assist us when needs have arisen with the vehicle. He is honest, responsive, and has assisted us long after the sale was closed. We will definitely purchase future vehicles from him.






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Awesome service/repair department
My Suburban broke down, they were efficient and helpful in getting my vehicle repaired. Allan was great and I would definitely recommend this dealership to others.






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
It was a good experience.
It was a good experience. The lead sales man was a little on the rough side. But all was good.






Used
2020 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Bought a new truck from Nate.
Bought a new truck from Nate. Great to work with simple and easy. Will definitely trade with them again. Thanks again, Cary Tietjen






Vehicle information
Features
Reviews
We recently purchased a used Jeep Wagoneer from Heller
We recently purchased a used Jeep Wagoneer from Heller Ford in El Paso, IL, and the entire experience was nothing short of fantastic. Huge shoutout to our salesperson Onie Maisonneuve, who went above and beyond from start to finish. We live about an hour and a half away, but Onie made the process incredibly easy by handling everything over the phone ahead of time. By the time we arrived, all that was left was a quick test drive and a bit of paperwork—start to finish, we were in and out of the dealership in around 30 minutes! A couple of days after taking the vehicle home, a mechanical issue popped up. Onie was immediately responsive and had a loaner vehicle arranged and delivered to us the very next day. The service department didn’t miss a beat either—they had the necessary repairs completed quickly and efficiently, making sure we had our Wagoneer back just in time for a planned family vacation. I can’t recommend Heller Ford highly enough. If you’re looking for a dealership that truly stands behind their vehicles and values customer service, look no further. Ask for Onie—he’s the real deal!
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GMC Sierra 2500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 2500 SLT | $59,034 | 6 Great deals |
2024 GMC Sierra 2500 SLT | $52,995 | 54 Good deals |
2023 GMC Sierra 2500 SLT | $49,500 | 26 Good deals |
2022 GMC Sierra 2500 SLT | $40,749 | 8 Great deals |
2021 GMC Sierra 2500 SLT | $40,888 | 16 Good deals |
2019 GMC Sierra 2500 SLT | $27,990 | 21 Good deals |
2018 GMC Sierra 2500 SLT | $27,000 | 7 Great deals |
2017 GMC Sierra 2500 SLT | $27,590 | 14 Good deals |
2016 GMC Sierra 2500 SLT | $15,995 | 15 Good deals |
About the 2020 GMC Sierra 2500 SLT
SLT shown.
- Seating
- 5
- Door count
- 4
- 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 SLT cost?
The 2020 GMC Sierra 2500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 2500 SLT is $48,770, with pricing starting at $35,196.
What are some similar vehicles and competitors of the 2020 GMC Sierra 2500 SLT?
The 2020 GMC Sierra 2500 SLT compares to and/or competes against the following vehicles:
Is the 2020 GMC Sierra 2500 SLT 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
SLT (8 styles)
Style | |||||||
---|---|---|---|---|---|---|---|
2WD Double Cab 149" SLT | 4WD Double Cab 149" SLT | 4WD Crew Cab 172" SLT | 4WD Double Cab 162" SLT | 2WD Crew Cab 172" SLT | 2WD Double Cab 162" SLT | 2WD Crew Cab 159" SLT | 4WD Crew Cab 159" SLT |
Inventory price | |||||||
Starting at $51,000 | Starting at $53,800 | Starting at $55,800 | Starting at $54,000 | Starting at $53,000 | Starting at $51,200 | Starting at $52,800 | Starting at $55,600 |
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) |
*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
6 Great Deals out of 169 listings starting at $37,791
-
GMC Sierra 2500 2020 AT4
1 Great Deal out of 69 listings starting at $32,500
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