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Used
2021 GMC Sierra 1500 trucks
for sale
near
Sandown, NH
- 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.






Vehicle information
Features
Reviews
Great service, great people.
Great service, great people. Very fast and reliable, good communication throughout the whole process. Highly recommend.
This truck has a jerk when changing gears sometimes.
This truck has a jerk when changing gears sometimes. I enjoy the truck overall easy to handle and comfortable. Drive with ease sight is good when driving.






Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Worked with both MATTS they came to what I wanted for a
Worked with both MATTS they came to what I wanted for a payment. It was all done without going to dealership and that saved a lot of time. They were very professional, helpful and courteous though the whole process. The finance dept was smooth and explained all the paperwork for a fast transaction. I leased three vehicles from the new owners and will go back for my fourth. THANKS FOR ALL YOUR GREAT HELP.
Brake Pad Monitor
2021 GMC sierra 1500, 5.3, crew cab 4x4, 21000 miles. brakepad monitor lites up. dealership says needs brakes and rotors in back. one mo. on warranty. our rural roads dirty up the monitor. Needs new monitor. brakes look great to me. No noises. dealer says parts on order GM strike. Can't replace myself cause of computer...






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Pleasant experience!
I found the elusive trim level of Jeep I wanted here and was unsure of how negotiations would go. I was more than satisfied with every aspect of my purchasing experience. My salesperson Johnny was extremely knowledgeable and the sales manager Jim was incredibly flexible. The whole process was low stress and I left with my dream Grand Cherokee. Thanks Key Auto!
Nicest, best performing truck I've ever owned
My truck has a great appearance, inside and out. It is a pleasure to drive; and rides and performs great. It is the best truck I've ever owned.






Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Best dealership ever!
Best dealership ever! Porsche Stratham is both high quality and low pressure! The dealership itself is beautifully appointed and employs the top customer care, sales and technical team. The software the dealership uses in its service department must be state of the art as it provides incredible detail and makes it easy.
2021 GMC Sierra Denali
This is the nicest truck I have ever owned. Lots of features. Takes a while to learn what all it does but a really enjoyable vehicle.






Vehicle information
Features
Reviews
Amazing place to buy a car
Amazing experience. I'd recommend anyone looking for a car to try CarMax first... There's zero pressure, tons of beautiful vehicles, and just an all around great place. Will definitely be buying from here in the future. They're willing to work with you if you don't have the best credit, and most importantly, they're just honest and transparent. Two very important things when spending tens of thousands of dollars. Put it this way, it was great enough experience for me to come online and leave reviews all over!
Great Buy!
This truck is amazing. Turning heads all over as we tour the area. Those riding with is also enjoy the comforts and safety features. Great Buy!






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
The good team.
The good team. Their kidness and their job is amazing. I will recommend all my friends and family to come here car five Nashua






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Thank You !!!!!!
I like to thank Tim Jr and the service department for helping me with tires for my truck. As always was greeted with great customer service and the service tech did a great job . Thanks again Tim and team great experience every time.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Jen is an excellent consultant and the mechanic takes
Jen is an excellent consultant and the mechanic takes their time to explain what?s going on with your car to you. They also include a video of your car in the shop and what they found which I find to be extremely helpful.






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
buying a new truck
Jack A was wonderful to work with. He made buying our new vehicle stress free.






GMC Certified
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Awesome Experience as always
I as always had a Great Experience!!! Chris Benedetto took Great care of me got my car in and out in a timely manner he is Great to work with when I go in for Service!! and if need be he has gone above and beyond when my car is in for repairs






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Jim clouds buying experience
Awesome I was very pleased. They called me and told me they had a pickup I might be interested in so I went over and it was very close to what I was looking for so they give me a good price and I bought it.






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
We just purchased a 2024 GMC.
We just purchased a 2024 GMC. Bob Corey and Nick Pridham were amazing in helping us through the buying process. Bob was an amazing sales man.i Dont like the pressure most car dealers put on the customer but we felt none of that with Bob. Thank you so much for making our truck buying wonderful.






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Great no haggle price and trade best buying experience
Great no haggle price and trade best buying experience I’ve ever had buying new vehicle and this is my 30th!






GMC Certified
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Fast friendly, and didn?
Fast friendly, and didn?t try to talk me into anything I didn?t want! Thorough as well! Such a great experience! This was my second purchase from Banks and I?ll likely never go anywhere else!






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Friendly, helpful and took good care of us.
Friendly, helpful and took good care of us. Have been leasing cars at team Nissan for over 25 years. I will continue to use team Nissan for all of my future leases.






Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
I had a very good experience super easy sales process.
I had a very good experience super easy sales process. The salesman was a no pressure great guy as was the Finance department. Thank you

Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
All dealers should be this good.
What a difference! I bought a new car at a dealership in South Portland, Maine and will never go back there. Don't trust them. A month ago that car was totaled. After researching for two weeks I found the car I wanted online. I called Tulley and drove there from Maine the next day. I bought a 2018 BMW i3s from Tung Vu. This is how dealers should operate. They were upfront and honest and helpful and friendly. I wish all dealers were like this.
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Loved working with John.
Loved working with John. Kept us fully informed. He was professional and extremely caring of us as customers and as people. Will definitely return to this dealership as we have many times
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
This is a follow up to my review of 3/28.
This is a follow up to my review of 3/28. Went from disappointed to blown away and beyond pleased and satisfied. Spoke with them, they understood my disappointment and went out of their way to help me. Picked up my 2025 Corvette from them today, a week later. I highly recommend MacMulkin. Even though they are over 4 hours away they will be my first option for all future vehicle purchases. Do not hesitate to put them at the top of your list of dealers to consider. You will not be disappointed!


GMC Certified
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
GMC Service
The service completed before was supposed to be and was done very well.
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GMC Sierra 1500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 1500 | $35,974 | 3 Good deals |
2024 GMC Sierra 1500 | $34,650 | 7 Great deals |
2023 GMC Sierra 1500 | $35,487 | 19 Good deals |
2022 GMC Sierra 1500 | $30,798 | 14 Good deals |
2020 GMC Sierra 1500 | $28,500 | 9 Good deals |
2018 GMC Sierra 1500 | $20,997 | 4 Good deals |
About the 2021 GMC Sierra 1500
Base shown (base trim).
- Seating
- 3
- Door count
- 2
- Drivetrain
- Rear-wheel drive
- Combined MPG
- 16
- Transmission
- 6-Speed A/T
- Engine
- 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability)

How much does the 2021 GMC Sierra 1500 cost?
The 2021 GMC Sierra 1500 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 1500 is $39,584, with pricing starting at $17,992.
What is the MPG of the 2021 GMC Sierra 1500?
The 2021 GMC Sierra 1500 offers up to 14 MPG in city driving and 19 MPG on the highway for a combined rating of 16 MPG.
These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle trim, driving conditions, driving habits, vehicle maintenance, and other factors.
What are some similar vehicles and competitors of the 2021 GMC Sierra 1500?
The 2021 GMC Sierra 1500 compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 1500 reliable?
The 2021 GMC Sierra 1500 has an average reliability rating of 3.5 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 1500 owners.
Is the 2021 GMC Sierra 1500 a good truck?
Below are the Cars.com consumer ratings for the 2021 GMC Sierra 1500.
- Comfort 4.2
- Interior 4.2
- Performance 3.8
- Value 3.6
- Exterior 4.3
- Reliability 3.5
60% of drivers recommend this car
- Comfort 4.2
- Interior 4.2
- Performance 3.8
- Value 3.6
- Exterior 4.3
- Reliability 3.5
AT4 (2 styles)
Style | |
---|---|
4WD Crew Cab 157" AT4 | 4WD Crew Cab 147" AT4 |
Inventory price | |
Starting at $55,900 | Starting at $54,700 |
Combined MPG | |
16 | 17 |
Engine | |
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) |
Base (7 styles)
Style | ||||||
---|---|---|---|---|---|---|
4WD Double Cab 147" | 2WD Double Cab 147" | 2WD Crew Cab 147" | 4WD Crew Cab 147" | 4WD Crew Cab 157" | 4WD Reg Cab 140" | 2WD Reg Cab 140" |
Inventory price | ||||||
Starting at $37,300 | Starting at $34,000 | Starting at $36,400 | Starting at $39,700 | Starting at $40,000 | Starting at $34,700 | Starting at $30,100 |
Combined MPG | ||||||
19 | 21 | 21 | 19 | 19 | 16 | 16 |
Engine | ||||||
310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) | 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) |
Denali (3 styles)
Style | ||
---|---|---|
2WD Crew Cab 147" Denali | 4WD Crew Cab 147" Denali | 4WD Crew Cab 157" Denali |
Inventory price | ||
Starting at $55,800 | Starting at $59,300 | Starting at $59,600 |
Combined MPG | ||
17 | 18 | 18 |
Engine | ||
355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) |
Elevation (7 styles)
Style | ||||||
---|---|---|---|---|---|---|
4WD Double Cab 147" Elevation w/3VL | 4WD Crew Cab 147" Elevation w/3VL | 4WD Crew Cab 157" Elevation | 2WD Double Cab 147" Elevation | 4WD Double Cab 147" Elevation w/3SB | 4WD Crew Cab 147" Elevation w/3SB | 2WD Crew Cab 147" Elevation |
Inventory price | ||||||
Starting at $44,600 | Starting at $47,200 | Starting at $49,300 | Starting at $43,100 | Starting at $46,400 | Starting at $49,000 | Starting at $45,700 |
Combined MPG | ||||||
19 | 19 | 19 | 21 | 19 | 19 | 21 |
Engine | ||||||
310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) |
SLE (5 styles)
Style | ||||
---|---|---|---|---|
4WD Crew Cab 147" SLE | 4WD Crew Cab 157" SLE | 2WD Double Cab 147" SLE | 2WD Crew Cab 147" SLE | 4WD Double Cab 147" SLE |
Inventory price | ||||
Starting at $47,100 | Starting at $47,400 | Starting at $41,400 | Starting at $43,800 | Starting at $44,700 |
Combined MPG | ||||
19 | 19 | 21 | 21 | 19 |
Engine | ||||
310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) | 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) |
SLT (3 styles)
Style | ||
---|---|---|
4WD Crew Cab 147" SLT | 2WD Crew Cab 147" SLT | 4WD Crew Cab 157" SLT |
Inventory price | ||
Starting at $50,800 | Starting at $47,500 | Starting at $51,100 |
Combined MPG | ||
18 | 17 | 18 |
Engine | ||
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline 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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Used 2021 GMC Sierra 1500 by body style
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