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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
Honesty
I was attempting to purchase a clean looking Chevy Colorado and worked with Kyle Brewer. I am out of state so Kyle worked hard to show videos, answer questions and do an iphone facetime walkaround of the vehicle with me. I never did get a chance to make an offer. The following day when I called the dealership Kyle was away but I spoke with Julian Henson and he informed me that they could not sell the vehicle due to an improper and unsafe lift kit installation that made the vehicle unsafe to drive. Their honesty saved me time off work and flight costs. Had that been a dealership in MY area I would have had an unsafe vehicle pushed on me. I never once felt pressure to purchase and felt treated fairly and honestly throughout the process. I even received a call from the manager afterwards to follow up with me. Would be more than happy to do business with them in the future.
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 SLT
Vehicle information
Features
Reviews
April and Tyler take good care of your needs.
April and Tyler take good care of your needs. Always friendly. Service is always done right and without long wait times. Offer free coffee or water while you wait.
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
Great job texas motercars,very professional, got back to
Great job texas motercars,very professional, got back to me in a timely manner,ANSWERED ALL MY questions
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
Very nice bunch of people, enjoyed working with them.
Very nice bunch of people, enjoyed working with them. Thank you for the experience working with them. Enjoying my Suburban.
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
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
The day after I brought my pickup home following the
The day after I brought my pickup home following the on-star module replacement, I noticed some body and paint damage that could only have happened at the dealership. I had no real proof of this, only my word. Rob C inspected my vehicle and told me they would make it right. A week later my pickup looks as good as new and no charge to me. Thanks Rob and Corwin GMC!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Brandon was terrific!
Brandon was terrific! He goes over the car very carefully and even paired my phone for me! If you need a car. Go see Brandon!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Visiting from Wyoming and car broke down.
Visiting from Wyoming and car broke down. This was a week before Christmas. Service manager Dylan was able to get it check it out right away. Bad news, the engine needed major repairs. Sales man Kevin was excellent, was able to get us into another car quickly and without any hassle. Great service, picked up car 2 days later and was able to finish our visit and make it home as scheduled. They understood our problems and worked with us without any issues, even since we were stranded from out of state. Would recommend.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Wonderful experience!
Wonderful experience! They took great care of me and really listened to my needs. Will absolutely be back!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Oil change and 60,000 maintenance.
Oil change and 60,000 maintenance. Work was completed within time estimated. Service representative (Chris) was efficient and courteous. I am thoroughly satisfied with service provided.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
I've purchased probably 20 new vehicles in my life thus
I've purchased probably 20 new vehicles in my life thus far. This was the best purchase experience I've had to date. Dan, Kasey and the service team were exceptionally patient...I had a lot of questions. The service team was also exceptionally helpful as well answering some very detailed and specific questions with respect to the vehicle I was purchasing. I have always liked GM vehicles but having a great dealer to stand behind the product is more important than anything to me. The facility is state of the art and I like that but the people seem genuinely interested in doing right by me. If they continue to treat me as they have I will have little reason to ever look anywhere else for a vehicle. Really a great purchase experience and a really good deal as well.
Vehicle information
Features
Reviews
Update were timely.
Update were timely... the tire was replaced in just hours... Thanks Jacob for your help and time. My 2016 Chey Silverado run great on the open highway.
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Great vehicles, great people, great service!!!
I never enjoyed buying vehicles but Dan, and Royal Automotive, completely changed my views! I bought a 2017 F-250 at a great/no-haggle price, and couldn't have been happier! A little over a week later... CHECK ENGINE light comes on... you can imagine the feeling! Long story short- ROYAL AUTOMOTIVE has your back!!! Dan immediately showed support and customer backing... And what turned out to be something absolutely no one could imagine happening to a low mileage truck- blown head gasket/potential cracked cylinder! They not only fixed this unfortunate and unforeseen issue, but completely replaced it within one week of the check engine light! WOW!! Dan and Royal Automotive put a new engine for me...completely covered!! This place truly wants to not only see you happy, but keep you happy for the future. I can honestly say for such a big issue on a new-used vehicle, I am as happy as a customer could possibly be. I WILL refer him to friends and family, and I WILL purchase from them again! Thanks again for all of your honesty, patience, friendliness, and all around five-star customer service!! -Frank
Used
2021 GMC Sierra 2500 SLT
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 SLT
Vehicle information
Features
Reviews
Greene’s sales representatives were extrmely helpful in
Greene’s sales representatives were extrmely helpful in guiding me toward the used car that my specifications called for. This is unlike what I have experienced elsewhere. I’d recommend Greene!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Best Car Buying Experience We’ve Had!
Best car buying experience we’ve ever had! We came from out of state, everything was ready to go, super easy and smooth process! Adrian was fantastic to work with! We buy vehicles often and will definitely be repeat customers at this dealership! 10/10 recommend!
Used
2021 GMC Sierra 2500 SLT
Vehicle information
Features
Reviews
Great and easy to work with!
Great and easy to work with! They have great knowledge about trucks and know your needs.
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GMC Sierra 2500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 2500 SLT | 2 Good deals | |
| 2025 GMC Sierra 2500 SLT | $68,735 | 11 Great deals |
| 2024 GMC Sierra 2500 SLT | $62,194 | 65 Good deals |
| 2023 GMC Sierra 2500 SLT | $53,745 | 12 Great deals |
| 2022 GMC Sierra 2500 SLT | $50,803 | 9 Great deals |
| 2020 GMC Sierra 2500 SLT | $44,447 | 24 Good deals |
| 2019 GMC Sierra 2500 SLT | $39,968 | 16 Good deals |
| 2018 GMC Sierra 2500 SLT | $38,146 | 21 Good deals |
| 2017 GMC Sierra 2500 SLT | $34,406 | 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 $47,288, with pricing starting at $35,445.
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
16 Great Deals out of 195 listings starting at $36,425
-
GMC Sierra 2500 2021 AT4
5 Great Deals out of 109 listings starting at $41,995
-
GMC Sierra 2500 2021 Base
8 Great Deals out of 47 listings starting at $19,900
-
GMC Sierra 2500 2021 SLE
5 Great Deals out of 29 listings starting at $29,300
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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.
