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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 AT4
Vehicle information
Features
Reviews
Brought my vehicle in for routine maintenance on 3/3/26
Brought my vehicle in for routine maintenance on 3/3/26 and service was fast and efficient. Their customer service is great. The technician Carlos worked in my vehicle and did a great job. He was very job knowledgeable and informative. He went try rough thoroughly on next services and repair recommendations. I will be returning for future maintenance services and repairs!
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 SLT
Vehicle information
Features
Reviews
It's was great the people were very nice and helpful the
It's was great the people were very nice and helpful the people worked very hard to help me
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 Base
Vehicle information
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Reviews
It went well, but I didn?
It went well, but I didn?t get what I wanted for my trade in. Good place to shop for new vehicles. Reputable dealership. I was very satisfied with my purchase.
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 AT4
Vehicle information
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Reviews
Pre-Owned Car Purchase
I found purchasing a vehicle at Jerry Ulm Dodge to be a very pleasant experience. It's a very nice, modern facility with excellent amenities and a great staff. I highly recommend this dealership.
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 Denali
Vehicle information
Features
Reviews
Great experience.
Great experience. It was fun. Got what we wanted at a good price. Truck had a lot of cool features and they took the time to show me how they worked
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 Denali
Vehicle information
Features
Reviews
I?ve had two separate service visits recently at Huffines
I?ve had two separate service visits recently at Huffines Chevrolet Lewisville and the experience was amazing both times! My service advisor, Mike McLarty, was professional, communicative, and genuinely caring throughout the entire process. I was kept up to date every step of the way ? from check-in to follow-up ? and everything was handled promptly and with great attention to detail. Mike made sure I understood what was being done, checked in on progress, and even followed up afterward to ensure I was completely satisfied ? it?s rare to get this level of service these days. If you want excellent service and top-notch communication, ask for Mike! I?ll definitely be back.
Used
2021 GMC Sierra 2500 Denali
Vehicle information
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Reviews
I recently purchased a used 2026 Tesla Model Y Long Range
I recently purchased a used 2026 Tesla Model Y Long Range from CORWIN TOYOTO in Colorado Springs, Colorado. I worked with Sales Lady Jana Lillie and Finance Manager Scott Bartlett. Both were extremely professional and helpful. Jana did an excellent job showing the car and answering my questions. There was a missing charging cable that should have been with the car and Jana went the. Extra mile to make contact with the previous owner to procure the cable. A great experience overall. If in the market for a new or used TOYOTO I highly recommend you lookup Jana at CORWIN TOYOTO. Gene Depue
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
Violeta and Tim did great job with whole process Very
Violeta and Tim did great job with whole process Very transparent and very accommodating and was able To get me into the car I wanted and even fed us lunch highly recommend Violeta as sales person and countryside nissan
Certified
2021 GMC Sierra 2500 Base
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
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Features
Reviews
We had a fantastic experience working with Matt Smith.
We had a fantastic experience working with Matt Smith. Made the experience as painless as possible. Went above and beyond for us. Very very happy!!!!
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.
GMC Certified
2021 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
I Don?
I Don?t Trust My Car With Anyone Else. When I First Started Going There, They Were So Polite. They Made My Us Feel At Home. I Never Go Where I Don?t Feel Welcomed. Awesome, Staff
Used
2021 GMC Sierra 2500 Base
Vehicle information
Features
Certified
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
I bought my Raptor from Tommie Vaughn Ford (shelter
I bought my Raptor from Tommie Vaughn Ford (shelter green) and it was honestly a really solid experience. Everything went smoother than I expected and there weren’t any surprises along the way. Jason in finance was great to work with. He explained everything clearly, didn’t rush me, and made sure I understood all the numbers. I never felt pressured, which I really appreciated. He also helped me get a really good deal on some warranties, so I left feeling confident about the whole thing. Overall, the team treated me well and made the process easy. I’d definitely recommend checking them out if you’re looking for a Ford. I’m loving my Raptor.
Used
2021 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
I had a great experience coming in for an oil change.
I had a great experience coming in for an oil change. The drop-off process was quick and convenient, and they even offered me a ride to work, which I appreciated, although my job is close enough that I chose to walk. My appointment was at 9:00 AM, but I dropped my car off at 8:00 AM before heading to work, and by 10:15 AM they had already called to let me know it was finished. The service was fast, efficient, and everyone was very friendly. I have always been treated wonderfully anytime I?ve had my vehicle serviced here. Highly recommend! ?????
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
Mike Rose was our hero when we were looking for a almost
Mike Rose was our hero when we were looking for a almost new Tahoe. We were in Hickory and Morganton area, we were looking at a Tahoe at another Large dealer in Hickory, they SOLD it while we were looking! Called Mike Rose at Parks GMC and he took our name and number late February, 3rd He told us what he had on the lot and held it for us overnight. We arrived Feb 4th. to look at the 2025 Tahoe, High Country. We agreed on price and we drove it home. Love Mike Rose's attention to detail, southern charm, very nice, going above and beyond to help us. He was patient teaching us the new buttons and devices on the High Country Tahoe. We will purchase another new vehicle from him next week. People are important! Mike listened and treated us with respect and Southern Hospitality when we were looking for a vehicle.
Used
2021 GMC Sierra 2500 AT4
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Reviews
everyone is great there
I really liked everyone there that we met. When I drove the Jeep home Steve even was talking about maybe trading the truck in later. Mike was really a great salesman, I would give him 6 stars.
Used
2021 GMC Sierra 2500 Denali
Vehicle information
Features
Reviews
Willem was extremely professional and made an easy
Willem was extremely professional and made an easy transaction. Rachel followed up three times to make sure I was satisfied. Great team to work with
Used
2021 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Everyone is so helpful.
Everyone is so helpful. They made the buying process as easy as possible. I would recommend this dealership. I will definitely be buying there in the future.
Used
2021 GMC Sierra 2500 AT4
Vehicle information
Features
Reviews
Very polite and nice salesman.
Very polite and nice salesman.Answered all my questions. and it hadn't been so far away from where I am living I probley would have test drove the 2017 Kia Sorento they had.
GMC Sierra 2500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 2500 | $89,937 | |
| 2024 GMC Sierra 2500 | $74,186 | 5 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 $50,720, 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
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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.