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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
Excellent service and I did not even walk away with a
Excellent service and I did not even walk away with a car. I would shop again there 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 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
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
Features
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
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
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
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!
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
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??????
Certified
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
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
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
They dealer is so friendly and our sales person Daniel
They dealer is so friendly and our sales person Daniel Raboin was great highly recommend
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
Thank you!
Thank you! Sunday Ola, for your professional service in buying my Ford fiesta on 2/3/2026.
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
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
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!!
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Our experience there was great.
Our experience there was great. Everyone would cheerfully answer our questions. Our sales person Sheila Passmore really took a lot of time explaining the workings of the car. We still have questions, but Sheila said that we could bug her anytime (we will try not to). She is such a helpful person. The whole purchase was made easy and relaxed, no pressure and no rush at anytime. We have dealt with the Defouw dealership since 2014 and have always had really good sevice.
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.
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
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.
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GMC Sierra 2500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 2500 SLE | 3 Good deals | |
| 2025 GMC Sierra 2500 SLE | $56,818 | 14 Great deals |
| 2024 GMC Sierra 2500 SLE | $52,623 | 15 Great deals |
| 2023 GMC Sierra 2500 SLE | $47,092 | 12 Great deals |
| 2022 GMC Sierra 2500 SLE | $40,908 | 16 Great deals |
| 2020 GMC Sierra 2500 SLE | $37,852 | 14 Good deals |
| 2017 GMC Sierra 2500 SLE | $28,842 | 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 $42,279, with pricing starting at $29,300.
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
16 Great Deals out of 194 listings starting at $32,800
-
GMC Sierra 2500 2021 AT4
8 Great Deals out of 111 listings starting at $40,995
-
GMC Sierra 2500 2021 Base
8 Great Deals out of 42 listings starting at $23,797
-
GMC Sierra 2500 2021 SLT
6 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.
