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Used
2021 GMC Sierra 1500 trucks
for sale
near
Flossmoor, IL
- 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 Denali
Vehicle information
Features
Reviews
Honest and caring service went the extra mile to secure
Honest and caring service went the extra mile to secure my warranty which had just expired.I have been doing business with Advantage of Bolingbrook for over 30 years
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 Base
Vehicle information
Features
Reviews
Efren my service advisor was very helpful and efficient
Efren my service advisor was very helpful and efficient he took care of everything for me
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 AT4
Vehicle information
Features
Reviews
Went very smoothly The is the fifth vechicle we have
Went very smoothly The is the fifth vechicle we have purchased from this dealer and really appreciate the process of the purchase We plan taking this vechical back for service for the entire time we own it
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 AT4
Vehicle information
Features
Reviews
Amazing
Mike R was amazing. He even traveled to Chicago to bring our car to a different locations so we could see it. I would highly recommend this location.
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 AT4
Vehicle information
Features
Reviews
I am beyond pleased and impressed with this dealership.
I am beyond pleased and impressed with this dealership. Working with Rami and his team was easy, efficient, and professional. I used my own credit union for my financing and even they said what a pleasure it was working with Rami and Diamond and just how thorough and on top of things they were. I had never shipped a car out of state before and this was also my first Porsche and I’m sure I wasn’t the easiest to deal with at times, not on purpose of course, but just because it was such a new experience. I felt very taken care of and accommodated with everything I needed. Great communication and very fair. I can’t say enough good things! Very very happy and this dealer is top notch with quality of cars also - immaculate cars and care of them. My transport company even commented how nice this dealership is. We will be back for sure ! Thank you!!!
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 SLE
Vehicle information
Features
Reviews
I had a very good experience with caleb alvardo with
I had a very good experience with caleb alvardo with purchasing my 2024 honda rideline
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
The guys here were great!
The guys here were great! Had the truck pulled out and ready for us to test out. We came from out of town and they kept our kids entertained while doing all the paperwork. It was a quick, hassle free process. True mom and pop shop and they treat you as such. Thank you so much.
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Chuck Was Amazing!
Chuck Was Amazing!!! I Have Had Some Trouble With Credit In The Past Chuck Got Me A Great Rate And Perfect Payment Dealership Is Wonderful Too Not Your Typical Used Car Lot Very Clean And Modern And There Cars And Trucks Are Very Clean
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Grayson was very helpful and made the car buying
Grayson was very helpful and made the car buying experience the easiest it’s every been
Vehicle information
Features
Reviews
Great job in and out.
Great job in and out. IT'S been a good experience so I will let people know.
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
HELP WAS FOUND!
Alexandra help us solved our problem, We had to sell Grandmas Car without a title in short time in town. They gave us what we wanted without a title in a few hours at CarMax. This was an unimageable process that Alexandra help us through....Alexandra was Calm with Great Compassion. We Appreciate Alexandra and CarMax Thanks again..
GMC Certified
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Amazing as always!
Amazing as always! Paul and his team always take care of me and the process is efficient.
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Always a great and personalized experience!
Always a great and personalized experience! Definitely a VIP experience with every transition and handoff throughout the entire experience. Dominic and the rest of the team personalize the experience, and go above and beyond. The follow-up is next level between the technology and personalized touch. They have a loyal customer in our family!
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
My experience was the best; Andy is a very experienced
My experience was the best; Andy is a very experienced and kind person. He gives us good options and is patient with us so we can make a decision.
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
I had a very enjoyable experience.
I had a very enjoyable experience. Brad Siemsen greeted me in a friendly manner. Then, thank you to Kevin Dralle for making the the rest of my visit go very smoothly. He was concerned that I understood the process of having my vehicle appraised and presented me with a fair offer, which I accepted. He assured me that he would be there in the future for any further questions or concerns I may have. Thank you!
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
My salesman victor was great.
My salesman victor was great. The process was quick. I did not have to wait hours like at other dealerships I would definitely recommend you check Mike Anderson Chevrolet out. Thanks for everything
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
I've been purchasing automobile from Haggerty in Villa
I've been purchasing automobile from Haggerty in Villa Park for OVER 25 years. Also have them serviced at the Villa Park Haggerty location and body work done at the Glen Ellyn Chevy location. Good people and great service,
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
No issues 2 months later.
Bought 3 work trucks. Good price, no nonsense or upsell. 2 months have gone by and I am very happy so far. The amount of trucks they have is beyond belief.
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
I initially checked to see if the SUV I found on cars.
I initially checked to see if the SUV I found on cars.com was still available to look at. After sending the email, via cars.com, I got a text back within a few minutes saying the SUV was available and a salesperson would check with me to set up an appointment. I spoke with Jamie shortly thereafter and met with her at the dealership. The SUV was washed and ready for me to see and test drive. The rest of the purchase experience was fantastic!! For me, number one of the top three car buying experiences ever. I’m now retired and have bought a lot of cars. No high pressure, just great customer service. Keep up the great work Jamie and Bettenhausen!
Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Second car I purchased from castle gmc our sales person
Second car I purchased from castle gmc our sales person was Nubia /great experience every time helpful and always greats us as family highly recommend castle gmc Nubia and Brandon will take very good care of you . 👍🏻
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GMC Sierra 1500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 1500 | $61,898 | 1 Good deal |
| 2025 GMC Sierra 1500 | $58,207 | 5 Great deals |
| 2024 GMC Sierra 1500 | $48,453 | 14 Good deals |
| 2023 GMC Sierra 1500 | $44,676 | 9 Good deals |
| 2022 GMC Sierra 1500 | $40,587 | 9 Good deals |
| 2020 GMC Sierra 1500 | $34,243 | 8 Good deals |
| 2018 GMC Sierra 1500 | $25,537 | 6 Good deals |
| 2017 GMC Sierra 1500 | $24,053 | 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 $35,754, with pricing starting at $14,800.
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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2021 GMC Sierra 1500 by body style
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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.
