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Used
2021 GMC Sierra 1500 trucks
for sale
near
Boxborough, MA
- 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.
GMC Certified
2021 GMC Sierra 1500 SLT
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Went into Acura of Auburn to look at a slightly used
Went into Acura of Auburn to look at a slightly used Integra. I was greeted immediately by Erica Santanna. The Dealership was in great order and welcoming. During the process I was impressed both with Erica and the entire staff. Everyone I came in contact with was very friendly and seemed to be enjoying their jobs. Great atmosphere to be in. I have been in the automotive field for over 40 years and have seen all sides of the dealership world. This was refreshing! Erica made the process very easy and spent the time to explain not only the vehicle I was interested in, but also the process in purchasing in a very clear and precise manner and language. It was a pleasure doing business with this dealership and would highly recommend them to anyone looking for a new or used vehicle!
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...
Vehicle information
Features
Reviews
I have to say I was very happy with my car dealer Andrew
I have to say I was very happy with my car dealer Andrew what an amazing sense of humor he has and he was just so understanding and knew exactly what I was looking for in price range and in a vehicle. Thanks again Andrew @ Lux Auto Plus for my new ride!
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 Denali
Vehicle information
Features
Reviews
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.
Used
2021 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
I had an excellent experience at McGovern GMC
I had an excellent experience at McGovern GMC Westborough. Ben, my salesman, was fantastic—he was helpful, never pushy, and kept great communication throughout the process. He really listened to what I wanted, respected my budget, and even took the time to get to know me while sharing a bit about himself, which made the experience feel personal and comfortable. Omar in finance was just as great—super friendly, honest, and transparent about everything. The dealership itself was clean, well-maintained, and in a very convenient location. Overall, the entire process was stress-free and enjoyable. I’d highly recommend them!
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 AT4
Vehicle information
Features
Reviews
Great services and support, helpful in all possible ways,
Great services and support, helpful in all possible ways, from beginning to the end of closing
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Affordable pricing , clean facilities nice coffee area .
Affordable pricing , clean facilities nice coffee area . The employees were all very helpful and made sure I knew the right amount of time before my car was ready . I highly recommend
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Low to no pressure sales.
Low to no pressure sales. Good prices and inventory. I enjoyed the buying process (as much as one can). Thanks George!
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Beautiful showroom gorgeous used cars.
Beautiful showroom gorgeous used cars. I was taken aback by how awesome the service is.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Jarid was very straight forward.
Jarid was very straight forward. Easy to work with and gave us many options to choose from. He was patient and helped make the best decision for our family.
Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Honest, courteous service with no pressure from the sales
Honest, courteous service with no pressure from the sales person. The price of the GMC Canyon Denali and the value of my trade was more than fair. It was so good I drove four hours to get there and I’m glad I did. Thanks to Doug Lee and the entire staff at McGovern GMC for a great Truck buying experience.
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Great sales and finance teams made my car purchase fast
Great sales and finance teams made my car purchase fast and easy. I have bought several cars from this dealer and highly recommend them to my friends, family and co-workers.
Used
2021 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
My husband and I had the best experience at Tulley.
My husband and I had the best experience at Tulley. Dave our salesman was professional, knowledgeable and a great guy. A great dealership. We love our vehicles.
Vehicle information
Features
Reviews
Justin was a great guy to meet, and made our choice on
Justin was a great guy to meet, and made our choice on finding our car easy ...thanks Justin !
Used
2021 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
At my most recent visit to Imperial Toyota in Milford,
At my most recent visit to Imperial Toyota in Milford, Ma, Curtis Jones was my service advisor. I am a senior citizen, and I stopped in without an appointment because I had an indicator light that I was worried about. Curtis was so helpful!! He was friendly, patient, supportive and able to get my problem resolved. What a relief!
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
New car
Excellent salesman Scott. Dealership impeccable. Everyone professional and courteous. Explained every detail of buying process. Finance staff Kendra extremely professional and explained every process of leading my vehicle
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Just purchased a Rogue from here.
Just purchased a Rogue from here. Great experience. Worked with Justin. Would recommend working with him and the dealership.
GMC Certified
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Was a great experience with the dealership.
Was a great experience with the dealership. Tom, Kenny and Vinnie were great to deal with. Came up from New Jersey with a rental car and left with an awesome Sierra. Too bad the dealership wasn’t closer for me, but do recommend Tully
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Curtis was Unbelievable!
Curtis was Unbelievable! My Landcruiser was handled and all details were fixed in a quick fashion!
Vehicle information
Features
Reviews
Although I didn't walk off the lot with a car, I will say
Although I didn't walk off the lot with a car, I will say I very much enjoyed my experience here. The gentleman I dealt with was very nice and courteous. Wasn't at all pushy and tried to work with me the best he could. They even had someone drive the car 20 minutes out to see my technician. They really went out of there way to make things work. Unfortunately, we were not able to work things out, but If ever need to shop for a car again, they will be on the top of my list to check out there inventory.
GMC Certified
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Joe DuCharme
When waiting repairs. It?s a very comfortable place to wait. 2 different waiting area?s both with tv?s. Coffee, water and soda always available!
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GMC Sierra 1500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 1500 | $64,979 | 5 Good deals |
| 2025 GMC Sierra 1500 | $53,872 | 16 Good deals |
| 2024 GMC Sierra 1500 | $49,670 | 6 Great deals |
| 2023 GMC Sierra 1500 | $44,230 | 36 Good deals |
| 2022 GMC Sierra 1500 | $42,668 | 18 Good deals |
| 2019 GMC Sierra 1500 | $33,171 | 6 Good deals |
| 2018 GMC Sierra 1500 | $25,588 | 8 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 $35,760, with pricing starting at $13,900.
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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Compare the 2021 GMC Sierra 1500
2021 GMC Sierra 1500 by city
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4 Great Deals out of 25 listings starting at $24,747
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3 Great Deals out of 25 listings starting at $24,747
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4 Great Deals out of 30 listings starting at $24,747
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2021 GMC Sierra 1500 by body style
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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.