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Used
2021 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
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Honesty
I was attempting to purchase a clean looking Chevy Colorado and worked with Kyle Brewer. I am out of state so Kyle worked hard to show videos, answer questions and do an iphone facetime walkaround of the vehicle with me. I never did get a chance to make an offer. The following day when I called the dealership Kyle was away but I spoke with Julian Henson and he informed me that they could not sell the vehicle due to an improper and unsafe lift kit installation that made the vehicle unsafe to drive. Their honesty saved me time off work and flight costs. Had that been a dealership in MY area I would have had an unsafe vehicle pushed on me. I never once felt pressure to purchase and felt treated fairly and honestly throughout the process. I even received a call from the manager afterwards to follow up with me. Would be more than happy to do business with them in the future.
Beautiful truck
I love my 2021 GMC Denali 2500HD. I have gotten more complements on this truck than any other vehicle that I have owned. I get great highway fuel milage average 19-26mpg,which is great for a heavy duty truck!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Brandon was terrific!
Brandon was terrific! He goes over the car very carefully and even paired my phone for me! If you need a car. Go see Brandon!
Best truck I ever owned
Love my GMC. Owned a Chevy and this absolutely beats it hands down. Never had any issues. Inside is very comfortable and can't imagine driving anything else
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Had a oil change and tire rotation on my Toyota truck and
Had a oil change and tire rotation on my Toyota truck and the service I received was outstanding. The service department kept me informed on what was going on and asked before doing anything extra. Truck was clean inside and out when handed back to me. I would highly recommend DeeryBrothers service department and appreciate the great service I received.
GMC 2500 HD AT4
This is the first diesel I have owned. The power is amazing and I really like the room inside the cab. This truck is a beast... Love it!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Even though someone purchased the truck before I could
Even though someone purchased the truck before I could complete the required paperwork Chris was extremely informative & helpful. He even recorded a short video of the vehicle for me. A real pleasure to work with.
Never had one. Always wanted one and love it.
I love my Denali. Beautiful truck inside out. When I drive down the road all heads turn. I couldn't have made a better choice. That's Cortez for you good service.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
The staff here makes you feel comfortable and that your
The staff here makes you feel comfortable and that your opinion is valued. Will continue to do our business at this location! Staff is extremely personable!!
Early to tell truck has less than 100 miles
Truck was bought specifically to our travel trailer. We have to wait for 1000 break in before we can tow the trailer. So far the truck is very quiet, smooth running, & comfortable to drive. We were pleasantly surprised at how much interior storage space is available. Having the bed steps before rear tires and in the bumper sides is very nice. Bed rails are even with my shoulders so the steps get used a lot.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Great people on all levels, they were very helpful and I
Great people on all levels, they were very helpful and I recommend using them for all your auto requests.
Vehicle information
Features
Reviews
Easy process.
Easy process. Very nice people. The salesman was very patient with me and worked to get me the right vehicle. This was my second vehicle to purchase within the last 12 months. Great experience.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Friendly dependable service with quality GM parts and
Friendly dependable service with quality GM parts and quality lubricants. The service scheduler that I Always use is very knowledgeable and always accurate in the details he, Chase, provides. I would give him 6 stars.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Another satisfied customer 👍
Bought a 2017 Chevy Silverado 2500HD Duramax sales went above and beyond on getting me this truck they even delivered the truck and the paperwork to Kansas City didnt have to get off work and drive 2 hours to Higginsville Missouri 🤙
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Went Home with My Perfect Car! Twice!
I bought a Chevy Trail Blazer four years ago from Superior. It is still a joy to drive and very reliable. In June 2020, in the height of the Pandemic, I needed a second car and knew just where to look! Brandon Motard helped us find the Trail Blazer and helped us find a gorgeous 2013 GMC Acadia. This well maintained beauty floats down the road like she is brand new! Joe Usewicz was key to finalizing the deal, such as handling getting the registration and license plates, even though the DMV is closed. Do yourself a big favor and save yourself some headaches by seeing Superior first. No pressure and very high quality used cars, trucks, and SUVs. My third car will be from Superior!! They are honest and treat you right. Just look at the other reviews and count how many people are repeat customers. There is a reason for that! I made the two hour drive to find my perfect car and it was worth every mile to get there!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Best Car Buying Experience We’ve Had!
Best car buying experience we’ve ever had! We came from out of state, everything was ready to go, super easy and smooth process! Adrian was fantastic to work with! We buy vehicles often and will definitely be repeat customers at this dealership! 10/10 recommend!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Wonderful experience!
Wonderful experience! They took great care of me and really listened to my needs. Will absolutely be back!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Quick response and easy to work with
John was great to work with and no high pressure sales tactics. Went on a nice test drive and I personally loved the vehicle but my wife was set on another color. I will definitely be back when it comes time to upgrade my truck!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
My wife and I took our daughter over to purchase a car.
My wife and I took our daughter over to purchase a car. It was great experience working with Jim. We will be back.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
It's was great the people were very nice and helpful the
It's was great the people were very nice and helpful the people worked very hard to help me
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
I would like to say Rydell Chevrolet salesman and staff
I would like to say Rydell Chevrolet salesman and staff treat you very very well. They’re courteous and kind.. I drove over from Duluth to look at a couple vehicles and was treated Very well and you have a lot of nice used vehicles there in stock Scott Turner
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
I am a new customer to the Johnson auto group, and after
I am a new customer to the Johnson auto group, and after my experience will certainly be a returning customer. The sales staff, specifically Shelby, was amazing. They were attentive, fair, reasonable, and transparent throughout the entire process. I am so happy I decided to purchase from Johnson GMC. Ultimately, I left the dealership with a new truck and a great experience where I felt that I was a valued customer and that my business was truly appreciated.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
April and Tyler take good care of your needs.
April and Tyler take good care of your needs. Always friendly. Service is always done right and without long wait times. Offer free coffee or water while you wait.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
I went to the dealership to look at a couple of vehicles
I went to the dealership to look at a couple of vehicles to get a feel for which one I would go with. I was stressed and planned to just look, sell my car, and then make the purchase. Mr. Herbert Hunter presented options that allowed me to drive away in a new vehicle that same day as opposed to waiting a week or two. I recommend Allen Tillery. Allen Tillery has a large selection, professional staff, and will provide you with options to what you need or are looking for with your vehicle purchase.
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GMC Sierra 2500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 2500 SLT | 5 Great deals | |
| 2025 GMC Sierra 2500 SLT | $69,371 | 6 Great deals |
| 2024 GMC Sierra 2500 SLT | $62,162 | 5 Great deals |
| 2023 GMC Sierra 2500 SLT | $52,993 | 18 Good deals |
| 2022 GMC Sierra 2500 SLT | $50,897 | 8 Great deals |
| 2020 GMC Sierra 2500 SLT | $43,399 | 5 Great deals |
| 2018 GMC Sierra 2500 SLT | $39,115 | 30 Good deals |
| 2017 GMC Sierra 2500 SLT | $35,232 | 13 Good deals |
About the 2021 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 2021 GMC Sierra 2500 SLT cost?
The 2021 GMC Sierra 2500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 2500 SLT is $47,843, with pricing starting at $32,987.
What are some similar vehicles and competitors of the 2021 GMC Sierra 2500 SLT?
The 2021 GMC Sierra 2500 SLT compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 2500 SLT reliable?
The 2021 GMC Sierra 2500 has an average reliability rating of 4 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 2500 owners.
75% of drivers recommend this car
- Comfort
- 4.7
- Interior
- 4.6
- Performance
- 4.3
- Value
- 3.9
- Exterior
- 4.6
- Reliability
- 4.0
SLT (8 styles)
| Style | |||||||
|---|---|---|---|---|---|---|---|
| 4WD Double Cab 162" SLT | 2WD Double Cab 149" SLT | 2WD Double Cab 162" SLT | 4WD Double Cab 149" SLT | 4WD Crew Cab 159" SLT | 2WD Crew Cab 159" SLT | 2WD Crew Cab 172" SLT | 4WD Crew Cab 172" SLT |
| Inventory price | |||||||
| Starting at $54,600 | Starting at $51,600 | Starting at $51,800 | Starting at $54,400 | Starting at $56,200 | Starting at $53,400 | Starting at $53,600 | Starting at $56,400 |
| 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) |
*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 2021 Denali
14 Great Deals out of 171 listings starting at $31,600
-
GMC Sierra 2500 2021 AT4
4 Great Deals out of 94 listings starting at $39,995
-
GMC Sierra 2500 2021 Base
10 Great Deals out of 42 listings starting at $23,797
-
GMC Sierra 2500 2021 SLE
4 Great Deals out of 30 listings starting at $31,900
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This vehicle is certified pre-owned, backed by a manufacturer warranty, and typically undergoes a rigorous multi-point inspection to ensure quality and reliability.
This vehicle is currently in high demand given its competitive price, desirable features, and overall condition, and may have a higher chance of selling quickly.