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*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.
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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.






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Very pleasant and professional.
Very pleasant and professional. Jessica Carr was very helpful and friendly. Wait time was good.
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
Had a Kia Sportage stolen around Thanksgiving of last
Had a Kia Sportage stolen around Thanksgiving of last year. The collision shop in Henrietta was very very helpful and accommodating. The car was totaled. However. Went to BJ MAZDA dealership interested in a used CX-30. Salesman didn't seem to interested in helping me out. Conversation lasted about 5 mins Ended up buying one from a another Mazda dealership that afternoon.
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
Vinny is always great!
Vinny is always great! The buying process is easy with no pressure. Blasius has a huge inventory so it?s easy to find what you want and the customer service is top notch.
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
I dealt with Rich Noble and he was excellent.
I dealt with Rich Noble and he was excellent. I am very satisfied with the purchase. I would recommend Rich or Blasius to anyone looking for a new car.
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 Experience!
Our 2012 Dodge Ram truck was totaled in a roll over accident so we were looking for a new or used replacement. My husband had seen a truck he was interested in online at Craig Smith Chevrolet Buick. Our salesman, John Bird, was very attentive and knowledgeable. He guided us through the process of trying out and purchasing a 2019 Dodge Ram Hemi crew cab. We highly recommend checking out the vehicles available for purchase at Craig Smith in Galion and we also would suggest John Bird as your salesman.
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
I've purchased 4 cars here and every time, the experience
I've purchased 4 cars here and every time, the experience has been amazing. From sales to finance, every one is friendly and genuine. Highly recommend.






GMC Certified
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
I can't thank Imperial enough for a wonderful car
I can't thank Imperial enough for a wonderful car shopping experience. I shopped around for awhile found what I was looking for here in Mendon drove the hour and couldn't be happier. Thank You Keith Phaneuf for your kindness along with everyone else there at Imperial. I would highly recommend them for a vehicle.






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Very pleased and well taken care of.
Very pleased and well taken care of. David/Service is a pleasure to deal with, always very helpful. He looks out for my car needs and keeps me informed/updated with service and/or future needs.


Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Joey is great all Questions answered sale made
saw a f150 on the web called and talked to joey Friday drove up from Elkhart IN on Saturday took it for a drive was nice no pressure all questions answered by Joey had a check in hand drove away the place is great you like art? Well, the place is an art studio too lots of things to look at Mabe buy you buying used? Give them a look lots of inventory all makes and models, thanks again Joey...






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Stopped in to look at a Bronco, I was greeted at the
Stopped in to look at a Bronco, I was greeted at the front desk, spoke to a Craig and he was able to get to set up on a test drive! He was very knowledgeable and answered all my questions, the process is very streamlined and took a total of 2 hours! I will definitely be back for my next vehicle purchase!






Vehicle information
Features
Reviews
I spoke with Armon over the phone and he answered all
I spoke with Armon over the phone and he answered all vehicle and financing questions I had and was pleasant to deal with. Hopefully I can purchase a vehicle from you in the near future!






GMC Certified
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
I went to Mitch Smith Chevrolet for a new vehicle because
I went to Mitch Smith Chevrolet for a new vehicle because that is where my daddy found a hood used vehicle for me. Samuel Tucker is the salesman who helped me throughout the process. And he was awesome. See I had never purchased a vehicle without my daddy in my 50 years. He passed away in 2022 and I was scared to do this alone. But I wasn’t alone. Samuel was right there with me holding my hand. The vehicle I found online was actually in transit and not on the lot the day I went to buy. So 6 or so weeks later it came in. I went to test drive it and almost had a heart attack. Samuel ended up driving me as I was so nervous doing this without my precious daddy by my side. He walked me through the process once I said yes and ta da! It was done. Worst part is having to pay for it. But that is with everything you buy. I found a new friend that hot day in 2022 who has turned into a life long friend. I send everyone to him if they are looking for a vehicle. I tell him all the time that 2022 Silver sage metallic Traverse is the prettiest vehicle he’s ever sold. (But the 2023 Tahoe in that color is really nice too.). Samuel is a God fearing man and will do you right.






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
They seem like honest people.
They seem like honest people. I will always give them a shot when buying a Honda.






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Great Service!
Great Service! Fast, easy, transparent. I really appreciate a dealership that gets it and they do!






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Great folks to deal with
Richard and the rest of the team were great to deal with. No pressure and buying was easy. I highly recommend this group. Not sure what he other bad review was talking about.






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Service
As a whole Holm Automotive is fantastic. Everyone there is very courteous and helpful. Chuck Loader in service is fantastic.






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Owner Lawson Cattle
Highly knowledgeable, attentive to details, shared, cared and listened to the needs and wants of why I was there. Not to mention patient, kind and understanding.






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Joe Palomarez My salesman was absolutely fantastic.
Joe Palomarez My salesman was absolutely fantastic. Walked me through all the steps, got me the best deal on my trade, and put me in an unbelievable F150 XLT truck. I would definitely recommend Mac Haik Ford in Georgetown and their awesome Sales team and their Finance Dept which was definitely easy to work with and fast. If i could give 10 stars i would. Thank you again






Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Thanks T J Tolliver & Corwin Ford !!
In All my years of car buying, and lots of experience, with dealers and sales, Corwin rates number 1 on a scale from 100 to 1. TJ Tolliver went overboard delivering the vehicle and the price I needed. Thanks TJ and Corwin Ford for making car buying easier and less stressful!! William L. Dawkins
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GMC Sierra 2500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 2500 SLE | $45,295 | 2 Good deals |
2024 GMC Sierra 2500 SLE | $44,899 | 11 Great deals |
2023 GMC Sierra 2500 SLE | $35,889 | 6 Great deals |
2022 GMC Sierra 2500 SLE | $34,760 | 26 Great deals |
2015 GMC Sierra 2500 SLE | $13,900 | 6 Good deals |
About the 2021 GMC Sierra 2500 SLE
Base shown (base trim).
- 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 $44,575, with pricing starting at $30,989.
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 4.1 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 2500 owners.
Is the 2021 GMC Sierra 2500 SLE a good truck?
Below are the Cars.com consumer ratings for the 2021 GMC Sierra 2500.
- Comfort 4.8
- Interior 4.6
- Performance 4.4
- Value 4.0
- Exterior 4.6
- Reliability 4.1
78% of drivers recommend this car
- Comfort 4.8
- Interior 4.6
- Performance 4.4
- Value 4.0
- Exterior 4.6
- Reliability 4.1
*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.
GMC Sierra 2500 trims
-
GMC Sierra 2500 2021 Denali
17 Great Deals out of 220 listings starting at $39,595
-
GMC Sierra 2500 2021 AT4
9 Great Deals out of 92 listings starting at $41,252
-
GMC Sierra 2500 2021 SLT
6 Great Deals out of 30 listings starting at $44,985
-
GMC Sierra 2500 2021 Base
11 Great Deals out of 24 listings starting at $28,633
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