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Used
2021 GMC Sierra 1500 trucks
for sale
near
Cos Cob, CT
- 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 1500 AT4
Vehicle information
Features
Reviews
Marilyn has awesome product knowledge found exactly what
Marilyn has awesome product knowledge found exactly what I was looking for. My experience was a smooth no pressure transaction.
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 AT4
Vehicle information
Features
Reviews
Awesome service!
Gary was great,He made everything really easy for us. In just a few hours we were on the road with our new vehicle! Highly highly recommend checking this dealer out! No rushing, no hassle, one of the best dealers I’ve been to,if not the best!
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 Denali
Vehicle information
Features
Reviews
Great experience.
Great experience. Andrew is the best. He was very noligable. Was able to get us a great price and we love our new vehicle. We would not want to work with anyone else and will go to him for all our purchases. We highly recommend Andrew if you are looking for a great price on an excellent vehicle. Five stars to Andrew and Stream Auto. Thank you so much
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.






GMC Certified
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
I made a last minute appointment and was accommodated in
I made a last minute appointment and was accommodated in a timely fashion. The service was excellent. I wax just in there for an oil change and a tire rotation and it was cheaper at the dealer then on the outside.
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
Extremely professional.
Extremely professional. Polite and courteous. Knowledgable. Willing to go the extra mile. Would recommend ten times over to friends and family alike
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
Wonderful experience, never felt pressured.
Wonderful experience, never felt pressured. Chris answered all the questions and explained features. He was very patient with me. I would recommend this place to anyone






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
New car purchase
My husband and myself went to East Hills looking for a 2022 Equinox our salesman was George. I can't say enough about him, he didn't force us into anything and worked with us to keep in our budget. If you need a new car go to East Hills and ask for George!!!!!!






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Good dealership for buying vehicles
Veronica is excellent sales person and she is professional. She has given options to choose but not forced to buy and finally bought what I wanted. She is very nice.






Vehicle information
Features
Reviews
Wow, I truly can't say enough good things about this
Wow, I truly can't say enough good things about this dealership. My first experience buying a car at another dealership was horrible and left an awful taste in my mouth. However, Blasius South was completely different. Jay, Dejon, and Ross made the process painless. They always had a smile, went above and beyond to help, and were extremely open and transparent! I didn't think I would ever have a good experience buying a car, let alone a GREAT experience. I am truly thankful and will continue recommending them to friends and family! 10/10.






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
The Ingersoll employees provide excellent and friendly
The Ingersoll employees provide excellent and friendly service as always whenever I go there for service or to purchase a new car. I highly recommend the dealership.






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
The experience and professionalism we received from Mark
The experience and professionalism we received from Mark and the team at the Bomnin was amazing.






Used
2021 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
Service
Sean my service provider was excellent and insured my interaction with the service department went smoothly.






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Always reliable and outstanding customer service.
Always reliable and outstanding customer service. Waiting area well stocked and comfortable. Staff friendly and informative, attentive to details and future needs. Service department used modern diagnostic equipment that can be reviewed while waiting






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Curry Chevrolet is the ONLY dealer to use!!!!
Going to Curry Chevrolet is like going home to family. Everyone takes care of you. My salesman, Danny, was invaluable when it came to matching all my needs, going to get my new Chevy from Canada and showing me all the fancy features at the day of delivery. Mike Crispinelli, general salesman, was someone who basically moved heaven and earth to get me the car of my dreams. Boy can he come through when it looked like all was lost. Marsha Ashley, finance manager, couldn?t have made the purchase any smoother or easier to go through. Last car, she gave me such good advice for purchasing an extra warranty package. I can?t tell you how many times I thanked her in my head! This time around, that was my first question- do they still have the extra warranty? The answer was yes!!! Purchased that with no hesitation. Marsha really looks out for the customer?s best interest. Let?s not forget to mention Dirk Miller, service advisor, who will always fit you in and make sure your vehicle is running smoothly. He was instrumental in getting my running boards on so I could pick the car up a day early. On another occasion, he gave me his personal cell phone number to help me with a flat tire situation. Tire was unavailable and he told me to call him if I got stuck and he would send the Calvary. It was such piece of mind but thank goodness the tire lasted for one more day. What employee would do this for a customer? He?s a true gentleman and gracious example of how people should treat others! I?m sooooooo happy with Cury. I always brag about my gem of a dealership!






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Just picked up my 4th BMW.
Just picked up my 4th BMW. Always had Uday (UB) as my sales person! He’s the best!






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
The entire staff treated me well and answered all of
The entire staff treated me well and answered all of questions. Ezzy and Jose(mgr) are the best.






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
From the moment you are waiting to be seen, the outside
From the moment you are waiting to be seen, the outside person greet you with a smile and a good morning. Then you go inside to talk to your service advisor. In this case it was Sammy who took care of me with pleasantries, and knowledge,






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
The only reason I’m giving 5 stars it’s because of the
The only reason I’m giving 5 stars it’s because of the service rep Chelsea. That young lady was pure class. Very professional from the moment I walked in. Absolutely a pleasure to deal with her. Over the past year I’ve been used to being ignored by the service reps. Saying good morning just to get an acknowledgment. But some people find being on their cell phone and texting is more important than responding to a good morning. You literally have to ask people for help even though there’s customer in front of you. Finally on this trip as soon as I walked in I was greeted by Chelsea. I was very impressed with her professionalism. She was very polite and patient. She did search on the computer and sold me a package. Other Than the big guy outside who takes picture of the cars coming in, Chelsea is the absolute most professional service advisor I have ever dealt with in that dealership. Excellent service. I really felt welcomed on that day.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
I had a great experience at Blasius South.
I had a great experience at Blasius South. The staff was friendly, knowledgeable, and genuinely helpful throughout the entire process especially Luis, Veronica, Jay, and Mike L. They made buying my car easy and stress-free, answering all my questions and offering great advice, and went above and beyond to make sure everything was taken care of. Highly recommend this dealership for anyone looking for a smooth and pleasant car-buying experience!






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
I visited on the second day being opened and had a great
I visited on the second day being opened and had a great experience in buying a 2022 Explorer and trading in a 2016. It was seamless. Had an issue with the new car that turned out to be a factory defect that they had Ford correct. All good. I’ll be back.
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GMC Sierra 1500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 1500 | $38,980 | |
2024 GMC Sierra 1500 | $37,882 | 14 Good deals |
2023 GMC Sierra 1500 | $38,365 | 13 Good deals |
2022 GMC Sierra 1500 | $30,749 | 10 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 $39,637, with pricing starting at $17,988.
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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