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Used
2021 GMC Sierra 2500 trucks
for sale
near
Orlando, FL
- 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 Denali
Vehicle information
Features
Reviews
Had to take my Kia Sorento in for an upgrade, everyone
Had to take my Kia Sorento in for an upgrade, everyone from the time I arrived with vehicle to the time I left with vehicle were outstanding on my service there.
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 Denali
Vehicle information
Features
Reviews
Went there yesterday with a Truck in mind.
Went there yesterday with a Truck in mind. Met with Nick G at the door, he was extremely helpful and professional. He got us the truck to do a test drive -- we loved it and were able to make a great deal, including trade-in so the deal worked for both parties. I am from MA, but I'd def take the hour ride back up if they had another vehicle I was interested in!
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 AT4
Vehicle information
Features
Reviews
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
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!!
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 AT4
Vehicle information
Features
Reviews
Nora was fantastic, everyone we came into contact with
Nora was fantastic, everyone we came into contact with was very easy to deal with. The car was prepped and ready to pick up. Overall Subaru of North Tampa did a great job. My wife and I enjoyed meeting Nora, we will be stopping by in May for a visit.
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 AT4
Vehicle information
Features
Reviews
Great buying experience!
Great buying experience! I drove my car home same day and they drove the vehicle that I had driven back to me the next day! Had my first service done and called on a Friday was able to get it in that following Monday. They even picked my car up at 8:30 and had it back to me w/ everything done by 11:30. They texted me the pic of my car and the services they took care of.
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.
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
Professional and polite was greeted upfront from the
Professional and polite was greeted upfront from the beginning. Work was done quick. Great job
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
Excellent and prompt service; Ellie is a great service
Excellent and prompt service; Ellie is a great service writer and very professional. Would recommend dealer. Everyone is friendly and professional and personable. Great dealership
Used
2021 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
I love my new 2025 Highlander.
I love my new 2025 Highlander. The process was pretty smooth although there were a few hiccups. On June 18th we ordered the new SUV and added several options. We paid a deposit that day. On July 18th, we received an email telling us the SUV was on order and gave us an approximate delivery date. When I looked at the order, 3 options were missing, one option was added that we did not want, and the base price increased by $500. Per Thankful, one of the options (mud guards) was already standard on the vehicle. She assured us that the 2 remaining options for floor liners and a cargo mat would be ordered and available when the SUV arrived. She said she couldn't remove the multi-media screen protector which we didn't order and didn't want at a cost of $150. The base increase of $500 was due to tarriffs according to Thankful. I really disagree with that. We ordered the vehicle in June and paid a down payment but Ed Martin increased the vehicle by $650 before we picked it up. We paid the increased price but really feel like it shouldn't have been added. We've been buying vehicles from Ed Martin for 23 years and will probably buy again but this did bother us.
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
I went into Corwin looking for a specific vehicle.
I went into Corwin looking for a specific vehicle. Bailey Reed approached me and I told him I was interested in a truck on the lot. He went the extra mile for us to get what we wanted. He made it easy for us, I appreciate him a lot, he did a good job for my wife and I. This is the second time we’ve bought vehicles at Corwin, it’s our go to place for an honest deal.
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
BROKE DA SCALE PLAYA!
BROKE DA SCALE PLAYA! best experience loving the new car and I would definitely recommend Jarret to anyone looking to find their dream car :) I ended up finding something that fits my family perfectly
Used
2021 GMC Sierra 2500 Denali Ultimate
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Reviews
I have bought two vehicles from this place, and the
I have bought two vehicles from this place, and the vehicles are always immaculate, in excellent condition. Both the dealer's service and that of Sharon, the person who sold me both vehicles, are excellent. They explain everything, they help you, they are always available if you have any questions, they give you recommendations... everything is very transparent. It's an excellent place, and Sharon's service is exceptional!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
The people in the service department are very nice and
The people in the service department are very nice and extremely helpful
Certified
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
Cameron came to house yesterday for a mobile service, as
Cameron came to house yesterday for a mobile service, as always he was a very knowledgeable professional. He explained what was needed and most important WHY!!! Parks Ford Mobile Service is a great addition to their service dept. I would also note that Donna back in the dealership is great keeping you informed on your appointment and on the day of the appointment the ETA.
Used
2021 GMC Sierra 2500 Base
Vehicle information
Features
Reviews
Mike Bolton is a true professional.
Mike Bolton is a true professional. He explains everything thoroughly, educates you on the process, and is there for you every step of the way. Very pleased with the interaction we've had!
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
Visited the Sun Toyota service center today.
Visited the Sun Toyota service center today. James Lake, my service advisor is simply terrific. Got me quickly set up during an incredibly busy day. When my car was ready James came by and walked me back To the shop floor to my car and Kenneth Walter (sharp young guy) succinctly Showed me the issues and gave me two solutions. Professional, short and sweet with options. Sun Toyota is the best! I always feel well taken care of. I consistently have this kind of experience here. Highly recommend!
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
I requested info regarding a used car.
I requested info regarding a used car. The salesperson was honest, upfront and I believe trustworthy
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
I had a awesome experience at Chevrolet of Wayzata.
I had a awesome experience at Chevrolet of Wayzata. Got a great deal, everyone was really friendly and helpful. My wife really loves her new Chevy. I would definitely recommend this dealership for your next purchase. A+
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
"I just picked up a 2026 GMC Sierra 1500 Denali Ultimate
"I just picked up a 2026 GMC Sierra 1500 Denali Ultimate from Ed Martin Buick GMC, and I couldn't be happier with the experience. Arthur-Zarddy Gwion Jr. was phenomenal to work with. He treated the whole process with the level of professionalism you’d expect when buying a flagship truck. He was transparent, knowledgeable about the new tech, and made sure every detail was perfect. If you’re looking for a high-end vehicle and want a high-end experience to match, go see Arthur!"
GMC Sierra 2500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 2500 | $88,655 | |
| 2025 GMC Sierra 2500 | $72,837 | 2 Good deals |
| 2024 GMC Sierra 2500 | $72,706 | 4 Good deals |
About the 2021 GMC Sierra 2500
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 cost?
The 2021 GMC Sierra 2500 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 2500 is $50,844, with pricing starting at $23,797.
What are some similar vehicles and competitors of the 2021 GMC Sierra 2500?
The 2021 GMC Sierra 2500 compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 2500 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.
Is the 2021 GMC Sierra 2500 a good truck?
Below are the Cars.com consumer ratings for the 2021 GMC Sierra 2500.
- Comfort 4.7
- Interior 4.6
- Performance 4.3
- Value 3.9
- Exterior 4.6
- Reliability 4.0
75% of drivers recommend this car
- Comfort 4.7
- Interior 4.6
- Performance 4.3
- Value 3.9
- Exterior 4.6
- Reliability 4.0
AT4 (2 styles)
| Style | |
|---|---|
| 4WD Crew Cab 172" AT4 | 4WD Crew Cab 159" AT4 |
| Inventory price | |
| Starting at $59,300 | Starting at $59,100 |
| Combined MPG | |
| 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) |
Base (10 styles)
| Style | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4WD Crew Cab 159" | 2WD Crew Cab 172" | 4WD Crew Cab 172" | 2WD Crew Cab 159" | 2WD Double Cab 162" | 4WD Double Cab 162" | 4WD Double Cab 149" | 2WD Double Cab 149" | 2WD Reg Cab 142" | 4WD Reg Cab 142" |
| Inventory price | |||||||||
| Starting at $43,400 | Starting at $40,800 | Starting at $43,600 | Starting at $40,600 | Starting at $39,000 | Starting at $41,800 | Starting at $41,600 | Starting at $38,800 | Starting at $36,200 | Starting at $39,000 |
| 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) |
Denali (2 styles)
| Style | |
|---|---|
| 4WD Crew Cab 172" Denali | 4WD Crew Cab 159" Denali |
| Inventory price | |
| Starting at $65,700 | Starting at $65,500 |
| Combined MPG | |
| 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) |
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) |
SLT (8 styles)
| Style | |||||||
|---|---|---|---|---|---|---|---|
| 4WD Double Cab 162" SLT | 2WD Double Cab 149" SLT | 2WD Double Cab 162" SLT | 4WD Double Cab 149" SLT | 4WD Crew Cab 159" SLT | 2WD Crew Cab 159" SLT | 2WD Crew Cab 172" SLT | 4WD Crew Cab 172" SLT |
| Inventory price | |||||||
| Starting at $54,600 | Starting at $51,600 | Starting at $51,800 | Starting at $54,400 | Starting at $56,200 | Starting at $53,400 | Starting at $53,600 | Starting at $56,400 |
| Combined MPG | |||||||
| 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) |
*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.
Research the 2021 GMC Sierra 2500
Compare the 2021 GMC Sierra 2500
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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.
