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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
Purchased a used 2022 Super Duty at Kendall Ford Eugene.
Purchased a used 2022 Super Duty at Kendall Ford Eugene. Great experience! My salesperson Jeff was exceptional to work with and made me feel comfortable the entire time.
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
As usual, Kelly Buchner was there as I entered the
As usual, Kelly Buchner was there as I entered the service area. I have been getting my service with her for many years.She takes very good care of me and my car.
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
Great experience, we drove from central wis and they
Great experience, we drove from central wis and they treated us great! I would recommend them.
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
Chipmunk Distruction
It was on Saturday Memorial weekend. I spoke with Bob, who was very kind. I dropped my car off that evening. My car was seen in a timely manner, considering the holiday. I was contacted with the problem by Sue, on Tuesday, who was extremely knowledgeable and helpful. Thank you Sue!! The car was repaired the very next day. All is running smoothly. Thank you Colonial Ford of Marlborough.
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
Great communication, friendly staff, low pressure.
Great communication, friendly staff, low pressure. And the best part was I got exactly what I wanted
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
They were fantastic!
They were fantastic! I was worried about my first time buying a car! But they made it so easy!!
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!
Vehicle information
Features
Reviews
Fast, friendly and honest service!!
I recently bought a truck long distance. Brad quickly arranged a virtual test drive after I expressed interest in the vehicle. He was very upfront with any issues it had and sent me all of the pictures and documentation I asked for. I had financing ready when we arrived after a 13 hour road trip with three young kids. The truck was ready to go so we only spent about half an hour total at the dealership. I couldn’t have asked for a better experience. Thank you!
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
I purchased a vehicle from brothers auto sales about a
I purchased a vehicle from brothers auto sales about a month ago. The staff was super friendly and easy to work with shoutout to Maurice K for being a great salesman and helping me with the process! The owner Dale and finance manger Bob was great as well super easy signing in and out within a hour! if you need a great used vehicle go to brothers auto sales
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
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
As always excellent experience, Molstead men are
As always excellent experience, Molstead men are professional and friendly, Jack helped me find a new vehicle after my 3 month old vehicle was totaled. Deb worked with me for the sale. Thank you
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Calvin and Curtis went above and beyond.
Calvin and Curtis went above and beyond. They made me feel like family. Listened to my needs and gave me everything I was looking for. Highly recommended
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
In my search for a new vehicle, Mike Neilson went above
In my search for a new vehicle, Mike Neilson went above and beyond to locate the vehicle I wanted to buy. He was very kind, courteous, and helpful. He is one great salesman!! If you are in the market for another vehicle, look up Mike! You will not be disappointed!
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Working with Kyle Parrish and the rest of the team at
Working with Kyle Parrish and the rest of the team at Taylor Grubaugh Chevrolet Buick GMC was an absolute pleasure.
Vehicle information
Features
Reviews
4.95 Stars. Recently found a vehicle that I wanted,
4.95 Stars. Recently found a vehicle that I wanted, located on PricePro's lot in Ohio. (Im from Michigan) Communicated with John Velez, whom answered all my questions promptly. The car was priced low enough where no negotiations were needed. The dealership was able to do remote documentation for the sale. My only complaint, mild as it is, I bought a EV that should have been charged and ready for me when arriving. I drove from a state away to be informed their staff failed to plug it in over night. They rushed it down to a lvl3 charger and resolved the oversight! Besides the little xxxx up, I would buy again, I would recommend John Velez to you if your in the market for one of their vehicles.
Vehicle information
Features
Reviews
Working with Rich Tom was an outstanding experience from
Working with Rich Tom was an outstanding experience from start to finish. They were knowledgeable, transparent, and genuinely focused on helping me find the right truck — not just making a sale. The entire process was smooth, efficient, and pressure‑free. I’m thrilled with my new 2025 F‑150 Lariat and highly recommend Rich to anyone looking for a great buying experience.
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Came here expecting hidden fees and hours of back and
Came here expecting hidden fees and hours of back and forth and found none of that. We worked with Angel and test drove 2 cars fairly quickly. Shortly after we decided on a Scion. The price was a little higher than we budgeted for but Tristen was able to knock the price down a little to where we needed. Walked out the door happy, all within an hour and a half. If you want a pleasant experience, without hidden fees, Brown and Brown is the place. No nonsense indeed!
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GMC Sierra 2500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 2500 SLE | ||
| 2025 GMC Sierra 2500 SLE | $59,325 | 22 Good deals |
| 2024 GMC Sierra 2500 SLE | $53,334 | 22 Great deals |
| 2023 GMC Sierra 2500 SLE | $46,478 | 12 Great deals |
| 2022 GMC Sierra 2500 SLE | $42,307 | 20 Great deals |
| 2018 GMC Sierra 2500 SLE | $31,671 | 9 Good deals |
| 2017 GMC Sierra 2500 SLE | $29,146 | 9 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 $41,999, with pricing starting at $32,500.
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 189 listings starting at $36,995
-
GMC Sierra 2500 2021 AT4
5 Great Deals out of 119 listings starting at $29,995
-
GMC Sierra 2500 2021 Base
4 Great Deals out of 47 listings starting at $24,895
-
GMC Sierra 2500 2021 SLT
7 Great Deals out of 34 listings starting at $35,888
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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.
