Save your search and get notified when new inventory arrives.
Contact seller
Customize your budget
*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.
About your privacy: Cars.com is asking for your ZIP and credit rating because it helps us to make an educated guess at your sales tax and loan interest. These two factors can greatly change your monthly payment.
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
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.
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
Amazing experience with the sales and financing team.
Amazing experience with the sales and financing team. Got me the exact vehicle I wanted for a great price. No hassle or pressure to buy something I didn't want. Hightly 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
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.
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
Went in to look for an F150 with fewer miles than my
Went in to look for an F150 with fewer miles than my 2015. My wife and I drove one that was nice then my wife started commenting on how she really liked our old Expedition. Our salesman, Jay Wasson, looked at the inventory and told me he had two with low mileage in stock. We selected a beautiful Expedition Platinum. Jay worked very hard to get us the best price and the best trade in value. Best of all there was no pressure. He was very accommodating.
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
The internet manager and staff did a wonderful job in
The internet manager and staff did a wonderful job in setting up appointments, finding the right car and communicating.
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 very helpful in finding a car that helped my
They were very helpful in finding a car that helped my family needs - looked at a couple of cars and test drove to see which one would be a great fit for my hubby as he is 6ft and needed something with leg and head room
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
If you are looking for a Great Inventory selection and
If you are looking for a Great Inventory selection and helpful Salesman (Especially Rick McCall) Classic GMC is your place!
Vehicle information
Features
Reviews
Our experience with Don's Ford was very good.
Our experience with Don's Ford was very good. Collin was very in tune to the car of my choice and overall purchase. He went above and beyond if he was unsure of a question(s) that related to the vehicle's options and did not hesitate to ask others in the dealership. He listened, was very attentive, knowledgeable and had very good customer service. Keep up the nice work. Appreciative Customer.
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
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
Used
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
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
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
Features
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
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
I was very impressed with all the help I received when I
I was very impressed with all the help I received when I purchased my new Ford Ranger. I am happy with my purchase and hope for many great miles of diving this great vehicle.
-
Prev - 1
- 2
-
Next
GMC Sierra 2500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 2500 SLE | ||
| 2025 GMC Sierra 2500 SLE | $60,013 | 19 Good deals |
| 2024 GMC Sierra 2500 SLE | $53,307 | 9 Great deals |
| 2023 GMC Sierra 2500 SLE | $47,486 | 6 Great deals |
| 2022 GMC Sierra 2500 SLE | $42,569 | 15 Great deals |
| 2020 GMC Sierra 2500 SLE | $37,515 | 7 Great deals |
| 2018 GMC Sierra 2500 SLE | $30,109 | 11 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 $42,375, with pricing starting at $32,477.
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
13 Great Deals out of 188 listings starting at $37,455
-
GMC Sierra 2500 2021 AT4
4 Great Deals out of 114 listings starting at $32,292
-
GMC Sierra 2500 2021 Base
2 Great Deals out of 44 listings starting at $24,988
-
GMC Sierra 2500 2021 SLT
6 Great Deals out of 31 listings starting at $37,850
- ${price_badge()}
- ${ami_badge()}
- ${battery_badge()}${ev_report_link()}
- ${hot_car_badge()}
- ${award_badge()}
- ${cpo_badge()}
${price_badge_description}
${ami_badge_description}
The EV Battery Rating is based on this vehicle's current expected range relative to the vehicles expected range when new. ${battery_badge_text}
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.
