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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 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 AT4
Vehicle information
Features
Reviews
Instant response to my inquiry from Kristen.
Instant response to my inquiry from Kristen. Didn't even visit this dealer because they were over priced on a car I wanted by 3 to 6 thousand dollars as compared to other dealers.
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 Denali
Vehicle information
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Reviews
Fantastic Experience!
Had a pleasure doing business with Russell Westbrook CDJR for my new 2021 Dodge Challenger! Zaman, Moses, and Jay worked with me tirelessly to make sure I was happy with the car and our deal for it. This is the second vehicle I've bought from them and I'll definitely be back for a third in the future. Highly recommended!
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 AT4
Vehicle information
Features
Reviews
The internet manager and staff did a wonderful job in
The internet manager and staff did a wonderful job in setting up appointments, finding the right car and communicating.
Used
2021 GMC Sierra 3500 Denali
Vehicle information
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Reviews
Great Salesman!
We just bought 2 vehicles! A 2022 Chevrolet and a 2018 GMC Terrain. Jerel was our salesman and I hope that this dealership realizes what they have, because he went above and beyond and was there with us to the end! We are very pleased with our new vehicles and would definitely go back!!
Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Absolutely splendid!
Absolutely splendid! Kept me informed secured the parts and returned the truck next day! Notified me via text and phone to keep me updated offered shuttle ride.
Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Absolutely the best!
Absolutely the best! Friendly staff. Great service. Will continue to go to Valley Buick and GMC for service of my vehicle and for future vehicle purchases
Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I contacted Luther Cadillac thru Cars.
I contacted Luther Cadillac thru Cars.com. A representative contacted me within a few mins but I changed my mind about the car and didn't have any more contact with this dealer.
Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
Amazing attention from kenmanuel carrizales this is the
Amazing attention from kenmanuel carrizales this is the second truck than I get with him nice un clean thank you again
Used
2021 GMC Sierra 3500 Denali
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Reviews
Easy experience.
Easy experience. Truck was clean, salesperson was very knowledgeable and friendly. There was very little pressure. The process of signing papers was efficient. I would buy here again.
Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
The experience of buying this Dodge ram truck from this
The experience of buying this Dodge ram truck from this dealership was exceptional! The dealership was courteous, professional, attentive, and kind. It was a really great experience!
Used
2021 GMC Sierra 3500 Denali
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Features
Reviews
Foundation Cadillac did it again—and honestly, I’m not
Foundation Cadillac did it again—and honestly, I’m not surprised! When my 12V battery died on my Cadillac Lyriq, David Hann and his incredible team jumped into action. They did whatever it took to get me back on the road quickly and stress-free. David is truly amazing—always professional, caring, and reliable. If you’re ever in need of service, repairs, or even looking to make a purchase, go to Foundation Cadillac and ask for David. You’ll be in great hands!
Used
2021 GMC Sierra 3500 Base
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Reviews
They gave me some cookies and were very nice.
They gave me some cookies and were very nice. And the car was super cool.
Used
2021 GMC Sierra 3500 AT4
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Features
Reviews
Love the service and how they keep me updated on
Love the service and how they keep me updated on everything that’s going on with my vehicle. The staff is so friendly and helpful. Would definitely recommend!
GMC Certified
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
I and my wife have always had EXCELLENT service and
I and my wife have always had EXCELLENT service and respect for Andrew and his team members. We first got introduced to Spitzer Northfield by Darrell Zasnuskie a salesman and friend. Andrew was doing service appointments and repairs when we first met him some 12-13 years ago. We had issues with our 2010 Buick that he painstakingly birddogged and resolved our vehicles issue, after a ridiculous amount of effort corrected our issue. Moving forward Andrew and his Service/Mechanical team have been GREAT partners. I have been Vice President of several companies. People skills and compassion is something that is hard to teach. BUT comes natural to people that really want to take care of each individual they encounter. If I could CLON the passion and real concern that Andrew and his team have for customers it would be incredible. Thank you for all that Spitzer NORTHFIELD and the service team does for me and my family. Stay Well God Bless... Chuck Montgomery
Used
2021 GMC Sierra 3500 Base
Vehicle information
Features
Reviews
I haved been all over Central Florida looking for a new
I haved been all over Central Florida looking for a new car and I was nearly to the point of either buying online or have a friend buy a car for me due to situation with other dealerships. One dealer in Tampa nearly made me call the police because they would not return my drivers license after asking multiple times and would not let me leave. The dealership above also give me incorrect information on the car to the point I googled information to show that I was right and the sales person was wrong. He also told me you don't need to rotate AWD tires. Another dealership had a very good deal on the car I wanted and when I drove 50 miles and completed all the paper work I went to the lot only to find out someone had called and given a deposit to buy the car so they could not sell it to me even though we had checked 5 minutes prior. The car stayed on line for 9 days but they continued to say it was sold. Long story short I was very happy that AJ Lamb had called me about the car I purchased and just kept asking me to come over and test drive the car. This dealership is not high pressure and very professional in the way they conducted my sale and I am happy with my purchase. I will recommend to anyone it is worth driving from Orlando and even Tampa if you want to be treated well.
Used
2021 GMC Sierra 3500 Denali
Vehicle information
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Reviews
Nathan the salesman was great to work with.
Nathan the salesman was great to work with. Finance through them was fast and easy. Great customer service. Would highly recommend them if you're looking for new or used vehicle
Used
2021 GMC Sierra 3500 Denali
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Reviews
I met with Dave Fisher, he made me feel very comfortable
I met with Dave Fisher, he made me feel very comfortable from the beginning all the way through the whole process of buying a used vehicle. No pressure, no stress. I was very happy I decided to go to Sapaugh GM Country. Thanks Dave for making the process and easy one
Used
2021 GMC Sierra 3500 Denali
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Reviews
We have bought vehicles from mike Atchison through the
We have bought vehicles from mike Atchison through the years they were nice vechiles come and see Mike Atchison
Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I recently had an exceptional car shopping experience at
I recently had an exceptional car shopping experience at Auto Boutique. From the moment I walked through the door, the staff was incredibly responsive, addressing all my queries with patience and professionalism. They were genuinely helpful, guiding me through the process without any pressure, ensuring I felt informed about my choices. The politeness of everyone at Auto Boutique was particularly noteworthy; they made me feel valued and respected throughout my visit. I have not yet found a car that perfectly matched my needs but left with a positive impression of what customer service should be. Highly recommended for anyone looking for a smooth and pleasant car buying journey.
GMC Sierra 3500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 3500 | $85,593 | |
| 2025 GMC Sierra 3500 | $76,448 | 42 Great deals |
| 2024 GMC Sierra 3500 | $71,020 | 63 Great deals |
| 2023 GMC Sierra 3500 | $61,543 | 26 Great deals |
| 2022 GMC Sierra 3500 | $58,619 | 34 Great deals |
| 2020 GMC Sierra 3500 | $54,434 | 18 Great deals |
| 2019 GMC Sierra 3500 | $46,092 | 7 Great deals |
| 2018 GMC Sierra 3500 | $48,844 | 6 Great deals |
| 2017 GMC Sierra 3500 | $43,255 | 5 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 $55,372, 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.
Research the 2021 GMC Sierra 3500
Compare the 2021 GMC Sierra 3500
GMC Sierra 3500 trims
-
GMC Sierra 3500 2021 Denali
15 Great Deals out of 91 listings starting at $45,900
-
GMC Sierra 3500 2021 Base
11 Great Deals out of 32 listings starting at $13,795
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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.
