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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
Scottsdale, AZ
- 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
Very friendly and efficient service.
Very friendly and efficient service. I am really happy with my new Encore! Ross Dillahunt far exceeds expectations when it comes to knowing the facts, checking the math, and helping with the technology!
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
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.
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 SLE
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.






Certified
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Bill Gramann, the finance, and insurance team were
Bill Gramann, the finance, and insurance team were wonderful to work with. They made the process of buying a car timely, professional, personable, and easy! Would highly recommend Bill and his team!






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
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






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Service department is top notch.
Service department is top notch..best of the best! Friendly yet professional, capably handled my every concern. Ride to/from my office very nice and appreciated touch!






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
The place to go for shopping new cars!!!
The BEST dealership ever!!!!! Staffs are friendly and they are so responsible!!! I purchased CARNIVAL from them even though I am living in CALI because all dealership in CALI charge extra for all there new or used cars!!! BUT not this dealership!!!! LOVE IT!!!!






Used
2021 GMC Sierra 3500 AT4
Vehicle information
Features
Reviews
Great maintenance experience.
Great maintenance experience. Listened to all my concerns. Found more issues on my engine and found out it was still warranty, so they were very honest. Got my truck back in great working order. Definitely recommend them.






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.






Certified
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Kevin Smith/Robbie Peters some of the two best if not the
Kevin Smith/Robbie Peters some of the two best if not the best car salesmen, very professional and very curdious, very helpful car salesmen that I have ever had experience with. If your looking to buy a car or anything contact these professionals that truly have your best interest at heart. I applied for credit on a Wednesday and was in a truck by Friday There was no bull or any run around, straight to the point and professional. So look no further when you contact them. Will recommend to everyone to contact them. - R. Wey






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Ed Perkins is a phenomenal sales person.
Ed Perkins is a phenomenal sales person. He is caring and concerned about customer satisfaction! Ask for Ed!






Used
2021 GMC Sierra 3500 Base
Vehicle information
Features






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I had a absolute pleasure working with Tuan while buying
I had a absolute pleasure working with Tuan while buying a new(used) car in mid-November. He is such a down to earth guy; willing to work with me on my wants and wishes. He helped ease all the anxiety going in and was so personable. We talked and hung out during the waiting process on the paperwork, he was so understanding; helped me set up the radio; got the car all washed up! I highly recommend going in and asking to work with him! He won't disappoint you! Kyle which is a manger I believe; he was very nice also and got me to the price I wanted. Darcee is the finance manager. She is great; we had to go back and forth with paper wok due to some stuff. Which I'm sure was annoying; but she was always professional about it and kind! Overall the whole experience was amazing and it all started with Tuan and being such a kind and understanding gentlemen!






GMC Certified
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
I will never buy a GMC from anywhere else.
I will never buy a GMC from anywhere else. The dealership and people are real and not fake flashy like others. I drive further to get my vehicle serviced there over Jerry Seiner because of the quality, timeliness and communication from the staff.






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Adam Killian and Randy were awesome!
Adam Killian and Randy were awesome! This has been the best experience we’ve had!






Used
2021 GMC Sierra 3500 Denali
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 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
Great experience!!
This is a very efficient crew from start to finish! We found a car on line and they met our schedule from start to finish to allow us to find the car of our dreams. Excellent value and we are so glad we found Tiffany, Mark and the entire crew. 100 per cent positive from start to finish. Thank you Dale and Nancy Reisbeck
GMC Sierra 3500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 3500 | $49,120 | |
2024 GMC Sierra 3500 | $49,353 | 8 Good 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 $55,886, 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.
Research the 2021 GMC Sierra 3500
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