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Used
2021 GMC Sierra 2500 SLE 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 SLE
Vehicle information
Features
Reviews
Susan and Roy were fantastic today helping me with my
Susan and Roy were fantastic today helping me with my phone connection and the fob battery. Also answered some of my other questions. Can’t say enough good things about them. They were Great!!
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 SLE
Vehicle information
Features
Reviews
CJ was a great salesperson; he gave us a five-star car
CJ was a great salesperson; he gave us a five-star car buying experience, I really recommend.
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 SLE
Vehicle information
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Reviews
Nick Graham and the GM at Kendall Ford in Eugene are the
Nick Graham and the GM at Kendall Ford in Eugene are the best, they listen to our needs and found the perfect car for us.
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 SLE
Vehicle information
Features
Reviews
Bought a new closeout 2025 Sierra for thousands less than
Bought a new closeout 2025 Sierra for thousands less than I had been seeing elsewhere . No tricks. No gimmicks. No add ons . Trade in price was high as well . Dealt with Travis Steyers .
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 SLE
Vehicle information
Features
Reviews
Best place I’ve ever been for a car.
Best place I’ve ever been for a car. We’ve bought two cars now. Any issues they helped us out immediately just very pleasant to work with these great folks. I would highly recommend you go check them out. You won’t be disappointed I promise
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 SLE
Vehicle information
Features
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
I just interested in a vehicle, I haven't even purchased
I just interested in a vehicle, I haven't even purchased one yet. I'm working with Jeff ODell, & I gotta say, what a not only nice but polite man. As car salesman go they remind me of lawyers. Jeff, he reminds me of like a preacher, very soft spoken, not pushy, well mannered, I really like him. I'm from a different city than his but it's well worth the trip to be treated with the kindness that they put out. Very nice man!
Used
2021 GMC Sierra 2500 SLE
Vehicle information
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Reviews
Andrew K!
Andrew K! What can I say, Andrew has to be the best salesman in Colorado, trust me I’ve been buying cars for a while, and I will never ever use another salesperson again!
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
My experience at auto boutique was very I was very happy
My experience at auto boutique was very I was very happy with my salesman Ola the manager and the finance manager. I recommend anybody go to get a five star for me. We’re very happy me and *my Wife who purchased a vehicle around four 2019 low mileage 36,001 154 miles looks brand new. I love it very happy very experience. I look very good experience so I recommend anyone to go there and get a five stars from me a lot of nice vehicle vehicles.
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Salesman Josh is down to earth and honestly speaking tell
Salesman Josh is down to earth and honestly speaking tell it like it is no sugar coating and Dennis finance manager is very easy to speak with and extremely helpful. This is my second time buying from Handy Toyota and I will do again and again. To anyone who is reading this review and not sure if you want to visit Handy Toyota, worrying about sales pressure or the lies that salesmen will tell you, just to sell you a vehicle; well Handy Toyota is not like that. The best advice I can give anyone skeptical about buying from them; go on line look at the inventory find what you like and reach out to them and they will answer any and all questions. When I inquired about the vehicle I was interested in Josh sent me a 360degree video showing the niceness of the vehicle as well as pointing out the flaws. Excellent job Josh! Thank you, Jerry Snide
Vehicle information
Features
Reviews
I did not end up purchasing a car with this dealership
I did not end up purchasing a car with this dealership however I did not because of the honesty of the dealership. The dealer fully disclosed prior damage the vehicle had and the repairs. It was my decision to not purchase because of the damage.
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Joe was great to deal with.
Joe was great to deal with. Meet my needs. Took time to go over options of different vehicles available. After purchase review all the options on the truck.
Used
2021 GMC Sierra 2500 SLE
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
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Quick buying process through online site.
Quick buying process through online site. Sales team was helpful and quick to get me out the door. I was pleased
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Madison was very helpful and very consistent in her
Madison was very helpful and very consistent in her efforts and checking on my current interest. She is a very good sales person.
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Fantastic experience at International Auto Sales in
Fantastic experience at International Auto Sales in Garland, TX! From start to finish, the team was professional, honest, and incredibly helpful. The GM and Finance Manager made the entire car-buying process smooth and stress-free. Selection was top-notch, and the pricing was fair and transparent. I felt valued as a customer and never pressured. If you're looking for quality cars and five-star service, this is the place to go. Highly recommended!
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Great Jeep!
Thanks for the Jeep Rick! And thanks for all the help! The Jeep is really neat, I can finally go rock crawling. Dreams really do come true!
Used
2021 GMC Sierra 2500 SLE
Vehicle information
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Reviews
I recently purchased a Subaru Forrester from Ferguson
I recently purchased a Subaru Forrester from Ferguson Subaru. My salesman, Chester lohman was very knowledgeable And it was a very non-pressure environment. All of the people I dealt with were very knowledgeable And patient. They’ve made me feel like they really take care of you after the sale as well. I would definitely shop there again when needed.
Used
2021 GMC Sierra 2500 SLE
Vehicle information
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Reviews
Buying a used car from Carl Schaeffer at Nissan
Buying a used car from Carl Schaeffer at Nissan autocenter couldn't have been easier, a truly pleasureable experience. Definitely worth the drive to Herculaneum to see the car in person and test drive it. The car was exactly as advertised on cargurus!
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
I am pleased to share my recent experience of purchasing
I am pleased to share my recent experience of purchasing a car from Parkway Auto Center, where I received exceptional service from Marcus Anzivino. He demonstrated remarkable patience and provided invaluable assistance throughout the process. After conducting a credit check, which did not yield the best results, Marcus advised me to contact my bank, make a payment on my credit card, and request a pre-auto loan. I followed his advice on Friday morning, but unfortunately, my bank declined my application. I promptly informed Marcus of the denial, despite having made a payment on my credit card in an effort to improve my chances of approval. I then inquired about the possibility of having my brother cosign the loan, to which Marcus agreed. He sent me a link where my brother could provide the necessary cosign information, and within 30 minutes, Marcus contacted me with the welcome news that my application had been approved. He inquired about a convenient time for me to collect my new vehicle. I was thrilled to receive this news, especially considering that my bank had previously declined my application and having my brother cosign was my last resort. With winter approaching, I was eager to acquire a reliable vehicle, so I informed my brother of the update, and we proceeded to sign the necessary paperwork the following day, on Saturday. I am delighted with my new car, and I would highly recommend Marcus to anyone seeking to purchase a vehicle. Thank you, Marcus, for your exceptional service throughout this process.
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GMC Sierra 2500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 2500 SLE | 1 Good deal | |
| 2025 GMC Sierra 2500 SLE | $57,707 | 9 Great deals |
| 2024 GMC Sierra 2500 SLE | $52,518 | 18 Great deals |
| 2023 GMC Sierra 2500 SLE | $47,798 | 9 Great deals |
| 2022 GMC Sierra 2500 SLE | $41,377 | 18 Great deals |
| 2020 GMC Sierra 2500 SLE | $38,040 | 21 Good deals |
| 2017 GMC Sierra 2500 SLE | $27,798 | 15 Good deals |
About the 2021 GMC Sierra 2500 SLE
SLE shown.
- 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 2021 GMC Sierra 2500 SLE cost?
The 2021 GMC Sierra 2500 SLE price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 2500 SLE is $42,240, with pricing starting at $32,905.
What are some similar vehicles and competitors of the 2021 GMC Sierra 2500 SLE?
The 2021 GMC Sierra 2500 SLE compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 2500 SLE 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
SLE (10 styles)
| Style | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2WD Crew Cab 172" SLE | 4WD Crew Cab 159" SLE | 2WD Crew Cab 159" SLE | 4WD Crew Cab 172" SLE | 2WD Double Cab 162" SLE | 2WD Double Cab 149" SLE | 4WD Double Cab 149" SLE | 4WD Double Cab 162" SLE | 4WD Reg Cab 142" SLE | 2WD Reg Cab 142" SLE |
| Inventory price | |||||||||
| Starting at $45,600 | Starting at $48,200 | Starting at $45,400 | Starting at $48,400 | Starting at $43,800 | Starting at $43,600 | Starting at $46,400 | Starting at $46,600 | Starting at $44,400 | Starting at $41,600 |
| Combined MPG | |||||||||
| 0 | 0 | 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) | 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
18 Great Deals out of 185 listings starting at $36,995
-
GMC Sierra 2500 2021 AT4
9 Great Deals out of 96 listings starting at $41,495
-
GMC Sierra 2500 2021 Base
7 Great Deals out of 41 listings starting at $23,797
-
GMC Sierra 2500 2021 SLT
5 Great Deals out of 39 listings starting at $32,987
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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.
