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Used
2021 GMC Sierra 3500 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 3500 Denali
Vehicle information
Features
Reviews
I had made the mistake of scheduling a service
I had made the mistake of scheduling a service appointment at the Salisbury dealership but my appointment was at the Lexington dealership what a blessing it was they waited on me which they didn’t have to so glad they did they saw something the needed attention and took care of it I could go on and on but I want just saying they treated me better than I expected I will drive further to go there even if the other ones are closer
Truck is a Solid vehicle overall.
Has a really Big feel to it. I currently use mine to pull gooseneck trailer. I haven't had a load yet that I couldn't pull. The downsides to this truck is to me I feel it could get better fuel mileage. Also I had trouble with #4 injector...dealership replaced it. Now my AC doesn't work all the time. Although it sounds like it's blowing it isn't.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Love it.
I love the new features this truck offers. I would highly recommend this truck if your looking for a Diesel. I provides all the features and benefits you would want.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Everything went perfectly.
Everything went perfectly. From arrival to departure. I ordered a new Key FOB from the Parts Department, they called when it had arrived, made a WEB appointment, all very easy. I was greeted promptly and taken care of by very friendly people. When the job was done, I was helped to use my reward paints toward payment. The job was completed much faster than I had expected.






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Staff was very pleasant and got me out of there fast.
Staff was very pleasant and got me out of there fast. Very fair deal and love the car I purchased. Elijah was very helpful.






Used
2021 GMC Sierra 3500 AT4
Vehicle information
Features
Reviews
Outstanding service.
Outstanding service. Worked with Erik for my first oil change in Service. He was super fast, got to the point, gave me accurate time frame for completion and communicated with updates while I was waiting. Also, Robert with customer service was awesome and even offered and bought me a star bucks coffee while I was waiting. Probably best dealership in country.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
This was my 2nd lease with Vinnie.
This was my 2nd lease with Vinnie. The leasing process was easy! Vinnie was great to work with. He was very helpful throughout the process and always got back to me quickly when I left a message.






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
We couldn’t be happier with our experience at Bellingham
We couldn’t be happier with our experience at Bellingham Nissan! We drove three hours to purchase our brand-new 2025 Nissan Frontier Pro-4X, and it was absolutely worth it. Chanel and Forest provided outstanding service from start to finish—quickly responding to all our questions via the website chat and text, helping us lock in the pricing we wanted, and making sure everything was seamless when we arrived. In person, they were just as fantastic! Over two days, we went on multiple test drives, asked tons of questions, and never once felt rushed or like we were a bother. Their patience, knowledge, and genuine helpfulness made the entire process enjoyable. We left with our new truck feeling excited and completely confident in our purchase. We’ll definitely be stopping by to say hi when we’re in Bellingham again! If you're looking for a stress-free, friendly, and helpful car-buying experience, we 100% recommend reaching out to Chanel, Forest, and the team at Bellingham Nissan!






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Bill was fantastic to work with!
Bill was fantastic to work with! Whole process took only a couple of hours and everyone was very helpful. Pricing was transparent and they worked with me to get me best interest rate possible.






Used
2021 GMC Sierra 3500 AT4
Vehicle information
Features
Reviews
I brought my F150 in for an oil change on 10/5/24 Jessica
I brought my F150 in for an oil change on 10/5/24 Jessica in the service department was awsome! She made sure our visit went as smooth as possible! She is very professional and curtious and knows her job well.






GMC Certified
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Very prompt response.
Very prompt response. Gave me all the details I needed. Follow-up has been very good






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Best dealship ever!
Best dealship ever! I highly recommend whether you have questions, are in the market to buy, or have you vehicle serviced. Stop by and see for yourself.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Everyone was very helpful and friendly.
Everyone was very helpful and friendly. I was greeted right away and my car was done before promised. Very pleased. Will definitely be back to use this dealer.






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Easy process.
Easy process. Dmytro was very helpful and accommodating. Follow up was timely. Found the car I wanted online, submitted a request for information, received a call back immediately.






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features






Used
2021 GMC Sierra 3500 AT4
Vehicle information
Features
Reviews
I loved the sale person Frank Myers he got into my new
I loved the sale person Frank Myers he got into my new ride. Thanks again & I'll keep going back. If anyone needs a new ride they will help u.






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Service was good , got my truck in and out quickly .
Service was good , got my truck in and out quickly . Was pleased that I got it back right away.






Certified
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Ryan at Walterboro Ford was great to work with throughout
Ryan at Walterboro Ford was great to work with throughout the whole buying process. Very laid back, no pressure selling. enjoyed the experience.






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
John was my salesman, Adam was the sales manager.
John was my salesman, Adam was the sales manager. I forget the name of the finance guy, but he was very nice too. This was one of the greatest dealer experiences I have ever had. First of all they have no dealer fee. The entire team went above and beyond. They all kept every single promise they made. John was very attentive to our needs. I can’t recommend this place enough.






Used
2021 GMC Sierra 3500 AT4
Vehicle information
Features
Reviews
Always a pleasure to deal with.
Always a pleasure to deal with. They are fair and have full knowledge relating to all vehicles. All questions and concerns are taken care of immediately and professionally.
GMC Sierra 3500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 3500 | $43,821 | 13 Great deals |
2024 GMC Sierra 3500 | $39,788 | 30 Great deals |
2023 GMC Sierra 3500 | $42,795 | 23 Great deals |
2022 GMC Sierra 3500 | $35,944 | 34 Great deals |
2020 GMC Sierra 3500 | $35,999 | 24 Great deals |
2019 GMC Sierra 3500 | $19,985 | 6 Great deals |
2018 GMC Sierra 3500 | $21,800 | 35 Good deals |
2017 GMC Sierra 3500 | $26,999 | 6 Great deals |
2016 GMC Sierra 3500 | $14,900 | 8 Great deals |
About the 2021 GMC Sierra 3500
Base shown (base trim).
- Seating
- 2
- 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 3500 cost?
The 2021 GMC Sierra 3500 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 3500 is $55,761, with pricing starting at $13,795.
What are some similar vehicles and competitors of the 2021 GMC Sierra 3500?
The 2021 GMC Sierra 3500 compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 3500 reliable?
The 2021 GMC Sierra 3500 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 3500 owners.
Is the 2021 GMC Sierra 3500 a good truck?
Below are the Cars.com consumer ratings for the 2021 GMC Sierra 3500.
- Comfort 4.5
- Interior 4.5
- Performance 5.0
- Value 4.0
- Exterior 4.5
- Reliability 4.0
100% of drivers recommend this car
- Comfort 4.5
- Interior 4.5
- Performance 5.0
- Value 4.0
- Exterior 4.5
- Reliability 4.0
AT4 (2 styles)
Style | |
---|---|
4WD Crew Cab 172" AT4 | 4WD Crew Cab 159" AT4 |
Inventory price | |
Starting at $60,500 | Starting at $60,300 |
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 (8 styles)
Style | |||||||
---|---|---|---|---|---|---|---|
2WD Double Cab 162" | 4WD Double Cab 162" | 4WD Crew Cab 172" | 4WD Crew Cab 159" | 2WD Crew Cab 159" | 2WD Crew Cab 172" | 4WD Reg Cab 142" | 2WD Reg Cab 142" |
Inventory price | |||||||
Starting at $40,200 | Starting at $43,000 | Starting at $44,800 | Starting at $44,600 | Starting at $41,800 | Starting at $42,000 | Starting at $40,200 | Starting at $37,400 |
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) |
Denali (2 styles)
Style | |
---|---|
4WD Crew Cab 159" Denali | 4WD Crew Cab 172" Denali |
Inventory price | |
Starting at $66,700 | Starting at $66,900 |
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 (8 styles)
Style | |||||||
---|---|---|---|---|---|---|---|
2WD Double Cab 162" SLE | 4WD Double Cab 162" SLE | 4WD Reg Cab 142" SLE | 2WD Reg Cab 142" SLE | 4WD Crew Cab 159" SLE | 4WD Crew Cab 172" SLE | 2WD Crew Cab 159" SLE | 2WD Crew Cab 172" SLE |
Inventory price | |||||||
Starting at $45,000 | Starting at $47,800 | Starting at $45,600 | Starting at $42,800 | Starting at $49,400 | Starting at $49,600 | Starting at $46,600 | Starting at $46,800 |
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) |
SLT (4 styles)
Style | |||
---|---|---|---|
4WD Crew Cab 172" SLT | 2WD Crew Cab 159" SLT | 2WD Crew Cab 172" SLT | 4WD Crew Cab 159" SLT |
Inventory price | |||
Starting at $57,600 | Starting at $54,600 | Starting at $54,800 | Starting at $57,400 |
Combined MPG | |||
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) |
*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.
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Research the 2021 GMC Sierra 3500
Compare the 2021 GMC Sierra 3500
GMC Sierra 3500 trims
-
GMC Sierra 3500 2021 Denali
6 Great Deals out of 77 listings starting at $42,888
-
GMC Sierra 3500 2021 Base
3 Great Deals out of 27 listings starting at $13,795
Used 2021 GMC Sierra 3500 by body style
2021 GMC Sierra 3500 by fuel type
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