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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 SLT 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 SLT
Vehicle information
Features
Reviews
Donovan was more than good at his job, and the phenomenal
Donovan was more than good at his job, and the phenomenal management team put me in the Perfect truck, words cant express my gratitude, I truly appreciate Patriot Chevrolet and will refer them to all of my friends!
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
The absolute best experience I’ve ever had buying a
The absolute best experience I’ve ever had buying a vehicle. No pressure sales or games. Fair prices and trade in values. Taylor listened to what I wanted and was personable, quick, efficient, and just a great guy. Same with the finance guy (sorry I forgot his name). The vehicle I was interested in was already washed , had gas and waiting for us. I will never go anywhere else.
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 SLT
Vehicle information
Features
Reviews
I had a big issue with my Buick enclave transmission, it
I had a big issue with my Buick enclave transmission, it is obviously a manufacturer issue, my car stayed for long while till the issue diagnosed and repaired, and I had to take it back again. I can?t deny that everyone in the dealership?s service department including service manager and my advisor did their best to make me happy, and actually I am! I got my car back finally and hope that the issue is solved forever and nothing else comes up, I am testing i for few days now. So thank you Serra Buick GMC Rochester.
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 SLT
Vehicle information
Features
Reviews
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 SLT
Vehicle information
Features
Reviews
I bought a 2023 S5 and was assisted by Will.
I bought a 2023 S5 and was assisted by Will. Will was awesome and made my purchase very quick and smooth. Will and Jerry were very friendly and communicative and didn’t make me feel pressured to buy. Great team, great cars, highly recommend MB motors. Thank you Will for helping us and entertaining my daughter during the process with all the amine talk.
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 SLT
Vehicle information
Features
Reviews
All right, where do I start first things first the lady
All right, where do I start first things first the lady who Who was our sales? Person did an awesome job her name was (Laura) But a few things I would like to mention about this dealership are 1st we had a few chips on the windshield that we’re taking care of by replacing a new windshield A+ 2nd The car gave out on me three weeks later due to a five year-old battery this vehicle was supposed to be certified with 120 point inspection. Autonation also took care of the cost of a New battery.A+ The outlets in the vehicle did not work and there was a month and a half wait to have them looked at. I replaced the relay fuses myself. C Waited over a month and a half to get the tax title and license was reassured by the sales manager (Ruiz) there was a 10 day grace. Which came to find out is NOT TRUE. And ended up putting two new tires because they were 4/32 and worn on the inside $535.00 out of pocket overall, the experience was a B- Think they could get a little bit more on the professional side.
Vehicle information
Features
Reviews
We had the best experience with Brian Escala and others
We had the best experience with Brian Escala and others at Stuckeys. We were treated with respect and courtesy, met our needs in the price range we could afford.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Gil Rhodas was phenomenal.
Gil Rhodas was phenomenal. He was able to create an offer surprisingly to exactly what I asked for. That’s why this is the dealer where I want buy another vehicle from.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
I went in to test drive a truck and within a few hours
I went in to test drive a truck and within a few hours later I owned it. I was treated with such great respect in every stage of the buying process. AJ, Kirby and Steve were not only professionals but it seemed more like working with good friends. I highly recommend Ford of Columbia!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Matt M helped me and he was amazing would highly
Matt M helped me and he was amazing would highly recommend to friends and family or anyone looking for a car. Made the process super easy I was super grateful for
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Smooth process from start to finish.
Smooth process from start to finish. Salesman, JD, was very helpful, very knowledgeable about the vehicle. I would definitely have no problem recommending Smith chevrolet/gmc
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Mr Heller and his sales staff and financial staff are top
Mr Heller and his sales staff and financial staff are top notch. My salesman was Ian. Fast and easy no xx and no pushy attitude. Knowledgeable in their inventory and allowed me to take my time. I signed all documentation online and they delivered the truck to me. Outstanding service.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Had three different sales people contact me .
Had three different sales people contact me .Found out that I am a second class person when it came down to the loan since I had joint car payment already With the wife she would need to sign as well . Not the dealerships fault just I wanted to buy one for myself without the wife’s consent she was not willing .
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Great Service from Teresa Once again.
Great Service from Teresa Once again. Happy Overall and Love Serra Kia. Best Service Team for my KIA.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
As a female, purchasing an automobile has always been an
As a female, purchasing an automobile has always been an intimidating experience for me, but I can say Blake made me feel at ease from the get go and Brooke in financing the same. They were both everything you’re looking for when making a major purchase! I strongly recommend Emmons Autoplex for your vehicle needs.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Sales person, Manny Garcia was genuine when talking with
Sales person, Manny Garcia was genuine when talking with him. He was nice and professional with my interaction with him. I recommend seeing Manny Garcia if you are looking to purchase a vehicle.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
I have bought several vehicles from Kunes Stoughton.
I have bought several vehicles from Kunes Stoughton. Each experience keeps getting better and better. Everyone in the store is friendly, never pushy or all about the sale. They treat you like they’ve known you forever! Just traded in my vehicle for a new one and it was the best experience yet. Thank you to everyone at Kunes!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
The service was fast and Jonathan, the seller explained
The service was fast and Jonathan, the seller explained me every detail of my vehicle. I definitely recommend Bomnin Nanuet and ask for Jonathan, he is the best!!
GMC Certified
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
A great car buying experience!
A great car buying experience! Ali Abdalla went above and beyond by being attentive to my needs and answering all my questions thoroughly without any pressure! Great car buying experience!!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
always professional and through service.
always professional and through service. Very courteous and helpful staff. Very pleased with care of my vehicle. Clean and pleasant facility. I always feel well cared for.
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GMC Sierra 2500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 2500 SLT | $75,771 | |
| 2025 GMC Sierra 2500 SLT | $73,571 | 10 Great deals |
| 2024 GMC Sierra 2500 SLT | $64,230 | 11 Great deals |
| 2023 GMC Sierra 2500 SLT | $55,264 | 29 Good deals |
| 2022 GMC Sierra 2500 SLT | $52,337 | 6 Great deals |
| 2020 GMC Sierra 2500 SLT | $47,003 | 5 Great deals |
| 2019 GMC Sierra 2500 SLT | $41,982 | 9 Great deals |
| 2018 GMC Sierra 2500 SLT | $39,716 | 6 Great deals |
| 2017 GMC Sierra 2500 SLT | $34,785 | 15 Good deals |
About the 2021 GMC Sierra 2500 SLT
SLT shown.
- Seating
- 5
- Door count
- 4
- 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 SLT cost?
The 2021 GMC Sierra 2500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 2500 SLT is $47,502, with pricing starting at $38,850.
What are some similar vehicles and competitors of the 2021 GMC Sierra 2500 SLT?
The 2021 GMC Sierra 2500 SLT compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 2500 SLT 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
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.
GMC Sierra 2500 trims
-
GMC Sierra 2500 2021 Denali
14 Great Deals out of 177 listings starting at $43,490
-
GMC Sierra 2500 2021 AT4
6 Great Deals out of 77 listings starting at $34,995
-
GMC Sierra 2500 2021 Base
13 Great Deals out of 34 listings starting at $23,744
-
GMC Sierra 2500 2021 SLE
6 Great Deals out of 34 listings starting at $32,500
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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.
