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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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2021 GMC Sierra 3500 crew cab 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 found a 2016 Ford flex online through true car and set
I found a 2016 Ford flex online through true car and set up an appointment for a test drive. Greg Morris was quick to respond and kept in touch with me answering all questions up to my appointment. When I arrived the car was out front. I had to wait a few minutes but not long and we went for a little test drive. I had already been pre approved by my bank for the loan so I went to get the check and Greg had my new car washed for me and waiting by the front Door. Signed all the paperwork there is a bit. Total time from appointment to complete was 4 hrs. But half that I was at the bank because I filled out my paperwork wrong. Had I done it correctly the dealership would have been able to complete that portion for me and save time. This dealership is full of gorgeous new jeeps and chargers and lots more. I had a very nice experience thanks to Greg! I absolutely love my new to me car!
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 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 Denali
Vehicle information
Features
Reviews
My Wife and I went into Huntley Ford, we met with Joon he
My Wife and I went into Huntley Ford, we met with Joon he made us a great deal on a Bronco and got us in and out Quickly. Will go back to buy another Ford their.






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 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 Denali
Vehicle information
Features
Reviews
LISA WAS AN ABSOLUTE PLEASURE TO DEAL WITH.
LISA WAS AN ABSOLUTE PLEASURE TO DEAL WITH. THE THUCK IS PERFECT. I HIGHLY RECOMMEND.






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 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
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
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






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 SLT
Vehicle information
Features






Used
2021 GMC Sierra 3500 SLE
Vehicle information
Features
Reviews
Good.
Good. God. Good. Good. Good. This requirement is not well received. Twenty five words is ridiculous. Twenty five words is ridiculous. Twenty five words is ridiculous.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I went to the GMC dealership to purchase the 2015 Acadia
I went to the GMC dealership to purchase the 2015 Acadia my salesman Michael Turner was very helpful showed me the suv we test drove and purchased thanks Mike I will be sending my friends there thanks a million






Vehicle information
Features
Reviews
I received expellant service at the dealership.
I received expellant service at the dealership. The service was prompt and friendly. I have used this service department for a recall and the service then was excellent.






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.






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Enjoyed my overall experience
Having purchased only new vehicles my entire life, I found myself in need of buying my girlfriend a certified used vehicle from a local Honda dealership. After the salesman ignored our desires and instead try to upsell us, however, we decided to try Carmax instead. From the start, Carmax offered a helpful hand online and friendly service over the phone: they were quickly able to find what we needed and provide attractive financing in a flash. (Thanks to you, Lesly.) Moreover, I found scheduling of a meeting to finish the deal at the dealership efficient. Once at the dealership, Haseam did well in helping us -- his knowledge and friendliness were impressive, especially since I havevworked in the service industry for many years . Because he did not try to upsell us, but rather did his best to educate us on what would work well, (coming in on his day-off to finalize the deal), I must commend Carmax and its associates for providing a memorable experience. Also, I was thankful that Dashau helped expedite the process when we completed the paperwork; what a breeze! Finally, I know I will come in buy my own used car in the future when my Honda Fit finally gives out. Thanks again, Carmax!






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
I was interested in a Nissan NV 2500.
I was interested in a Nissan NV 2500. Viewing several of these vehicles on cars.com and other sites. I decided to make the trip to Trust Auto in Maryland from West Virginia. About a 4 1/2 hour trip. I had talked to David on the phone to make sure the Nissan was still available and explained when I could be there to look over the vehicle. We made the trip in good time only running into one delay. Upon meeting David he brought the vehicle up to the front of the dealership and told us to inspect it, which is what we did. I had two top mechanic with me. While we knew the vehicle had been in an accident, the repair work was very well done on found a few bolts missing. One in the valance and the other from the inner fender. This could have been from the accident or just from being a service vehicle. A little over 94,000 miles on it. The detail shop did a great job on their work. Very chean for sure. After running the computer test, we took the Nissan NV for a test drive. It did not disappoint. Extremely happy with everything we saw and felt during the test drive. Steering was solid and tracked well. No pull to either side while driving. Throttle response was perfect as well as the braking system. The comfort of the Nissan NV was Avery pleasant surprise. The ride was almost as good as my Lincoln MKZ, almost.😎 Much like a 2006 GMC dually I had in 2007. Very nice. When returning to the dealership myself and the two mechanics talked things over and decided to go to the next step. After a little negotiation we settled on a fair price and made the purchase. David was very kind to us and I feel like we got a great deal. We finished the paperwork and was ready to leave but we were blocked in by another vehicle. I backed back into the parking spot when one of the ladies that worked there said she would move the vehicle so we could be on our way. She came back within a few minutes moved the vehicle and with a big beautiful smile waved goodbye to us as we left. That truly made my day😇. Trust Auto in my opinion is a great dealership and when I need another vehicle, they will be the first ones I will go to. Thank you to everyone who was so kind to us while we were there and may GOD bless everyone of them 🙏✝️🙏 Jon
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 $55,608, with pricing starting at $13,795.
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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