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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 3500 Base 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 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.
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
Was a great experience, never having purchased a car in
Was a great experience, never having purchased a car in this manor before. Summit and in particular Ryan Soukup was great and handled everything. Made this the best car purchase I’ve ever had. Would highly recommend all to go through Ryan.
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
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 Base
Vehicle information
Features
Reviews
I just bought a 2020 Ford Transit from Trust Auto in
I just bought a 2020 Ford Transit from Trust Auto in Maryland, thanks to Vlad, it went well despite the fact that I live in Florida. Kevin was very nice, seemed good at his job and well spoken, good guy. Vlad was fast, professional, and made the entire process incredibly smooth and straightforward. Vlad was responsive, sent photos within minutes of the underside of the van, and we finalized the deal in under an hour. The van was exactly as advertised, and it was delivered to my home in Florida in less than a week. Vlad and Kevin have great communication, humor, and transparency made. Vlad specially made this a stress-free purchase and I feel I got a good deal. I absolutely recommend Vlad and for the Accounting Kevin, Trust Auto is a good one!






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Bought my Toyota Rav4 from United Auto Sales from
Bought my Toyota Rav4 from United Auto Sales from Raelynn. The staff was friendly and didn't push me into anything. They showed me the Carfax and service records right away. Got approved for financing quickly with a decent rate. Everything was simple and honest. The car runs perfectly, and I'm happy with my purchase. Would recommend them if you're looking for a new car!






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Ali was good.
Ali was good. I had the financing secured online as well as a couple others to choose from that Ali provided.. Made sure the car was in tip top shape before delivery and handled everything at the RMV. Extremely satisfied with the process.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Great Dealership, Great Staff, Great Prices, if you're
Great Dealership, Great Staff, Great Prices, if you're looking for a car make sure that you stop in and look around. You can't beat the prices!






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features



Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Service oil change and new tires.
Good experience They help with my tire problem that the other tire shops in town could not seems not able to fix even though I took it back to them several times.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Weirs Motor Sales
My vehicle was in for an Oil Change, Air Filter replacement, and new tires. The service dept ran into an issue getting my vehicle to align properly after multiple attempts with different technicians. Know that I was waiting at the location for my vehicle the Service Manager informed me of the issue and what was done to correct it to that point. He offered me the option of dropping off my vehicle a different day so they could get the issue taken care of. He also gave me a vehicle to use while my vehicle was being repaired as well as matching the tire price and even found a rebate on the tires I purchased. I purchased my vehicle at this location and would recommend Weirs Motor Sales in Arundel Maine to anyone looking for a GMC vehicle.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
The sales people where very friendly and helpful, the
The sales people where very friendly and helpful, the Parts Department was also very helpful helping me purchase new floor mats and a bed mat, even installed them for me free of charge.






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 Base
Vehicle information
Features
Reviews
Excellent customer service.
Excellent customer service. Mr. Tony H. offered us personalized attention, truly beyond our expectations. Simply top-notch attention, very satisfied with his service. I highly recommend this dealers.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
I was in and out with new truck within 2 hours.
I was in and out with new truck within 2 hours. I love my new truck





Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Christian was great!
Christian was great! We came in to test drive a truck and went home with a great truck that exceeded our expectations! We were a prior customer 5 years ago, and we were treated right again!






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
I bought 2011 Honda Pilot in 2016 and 2010 Chevrolet
I bought 2011 Honda Pilot in 2016 and 2010 Chevrolet Suburban in 2024. Both transactions went well. Honest and easy to deal with. They were very upfront on the defects on the vehicles.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Everett Chevrolet service department is always efficient
Everett Chevrolet service department is always efficient and tells you exactly what’s service is needed for your vehicle. Tommy is also very good at telling you up front about the cost. We always use this dealership for all our services.






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Very pleased with the entire buying process at Leman's
Very pleased with the entire buying process at Leman's Chevy. Carson was great, he sent us a personal video of the vehicle and it was just as he described once we arrived for the test drive. Carson met us there on his day off and helped us through the entire process from the time we walked though the door.
Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
I'd highly recommend Lenz ad especially Mike if you are
I'd highly recommend Lenz ad especially Mike if you are the least bit interested in a used truck. I was treated great, and the transaction went extremely smooth!
Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Quick and easy
Nice sales group, every one was easy and kind to work with. The transaction went very smoothly and fast. I spent total of 3 hours between 2 days at the dealership and very happy with the end result.
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GMC Sierra 3500 prices by year
Model year | Prices from | Deals |
---|---|---|
2020 GMC Sierra 3500 Base | $29,987 | 6 Good deals |
About the 2021 GMC Sierra 3500 Base
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 Base cost?
The 2021 GMC Sierra 3500 Base price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 3500 Base is $49,430, with pricing starting at $13,795.
What are some similar vehicles and competitors of the 2021 GMC Sierra 3500 Base?
The 2021 GMC Sierra 3500 Base compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 3500 Base 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 Base 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
*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 3500 trims
-
GMC Sierra 3500 2021 Denali
3 Great Deals out of 68 listings starting at $46,631
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