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Used
2021 GMC Sierra 1500 trucks
for sale
near
Flower Mound, TX
- 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
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Beth Acosta and I negotiated a price over text and when I
Beth Acosta and I negotiated a price over text and when I arrived at the dealership they were true to their word and was great transaction.
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
Wanted more information on the damage to a car and none
Wanted more information on the damage to a car and none was giving to me
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 Elevation
Vehicle information
Features
Reviews
Excellent experience at Dallas Lease Returns.
Excellent experience at Dallas Lease Returns. Chris Mikell was great to work with. The entire process was quick and with none of the stress or pressure that often accompanies car buying. I would definitely buy from this dealer again!
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 SLT
Vehicle information
Features
Reviews
I had an excellent experience at Honda thanks to my
I had an excellent experience at Honda thanks to my service advisor, Robert. From the moment I arrived, he was friendly, professional, and incredibly knowledgeable. He took the time to explain what my car needed in a clear and honest way, without any pressure. Robert kept me updated throughout the entire maintenance process, and the service was completed quickly and efficiently. My car is running better than ever, and I truly appreciate the level of care he provided. If you?re looking for someone who genuinely puts the customer first, ask for Robert. He made the whole experience smooth and stress-free. Highly recommend!
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Garrett and Mario are the realest!
Garrett and Mario are the realest! 🤘🏼 - thank you for taken care of my car and making the process quick!
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Charles did fantastic!
Charles did fantastic! Amazing service, stayed late for us! Great communication and we will definitely be back!
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
After seeing the car online, the discussions with Kim at
After seeing the car online, the discussions with Kim at Sewell were professional and to the point. Car properly described online. Transaction was very simple. Car is very nice and I am very happy.
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Bought 2 Cars Here, Now Going Back
Bought a car here. After several years I traded it in and bought another. Values were fair on my trade-ins. Vehicles on the website are really the ones they have on the lot. No pressure, no negotiating, huge selection. Paperwork process like normal. I did have to refinance after I left there because the interest rates were steep and I got better deal from credit union. Overall recommend. Had a car accident, will return to Carmax.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
I was online and scheduled a test drive for the next
I was online and scheduled a test drive for the next morning. When I arrived, Xavier Perez met me and had the vehicle ready for me. After I decided to purchase the vehicle, Xavier helped me transfer some items from my current truck to the new truck. He facilitated with the service shop to have my NFab boards removed and put on my new truck and even put on my new tags and removed the license plate holder and hitch holder. Xavier was professional, seasoned and knew what to ask and how to make my purchasing process go smoothly. He is an excellent example of a veteran sales professional at Young Chevrolet
Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
We had a great experience.
We had a great experience. Nicole was honest and the pricing was very transparent. Even though we are several states away, we would absolutely work with Nicole and Sewell again.
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
I recently purchased an Audi A6 from Epic Motors.
I recently purchased an Audi A6 from Epic Motors. The only complaint that I have is that I cannot give them more than 5 stars…they deserve it. Their professionalism, communication, timeliness and transparency were outstanding. From start to finish the process and interactions were not merely transactional but they were personable. Cristian, Mo, and Jose were excellent. Without hesitation I would recommend Epic Motors to others, and I would unreservedly purchase from them again.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Cassidy and Charlie were the absolute best ever.
Cassidy and Charlie were the absolute best ever. The knowledgeable presentation of the Ascent far exceeded my expectations and what I thought I already knew about the vehicle. The rate the finance department got for me was better than what my own credit union offered. I highly recommend them to you and I already referred my cousin and his wife who bought a CPO ascent the very next week from them. You won’t be disappointed
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Ask for Herbert!
Ask for Herbert! He is the best! He is very friendly, knowledgeable, and personable. He made trading and purchasing much easier! I would buy from Autonation again for sure!
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Bought a 2006 Mercery Milan here today.
Bought a 2006 Mercery Milan here today. No pressure from salesman, just straight up great person. Arthur did let me ask the questions and answered every one. He didn't try to tell me a bunch of B.S. Just to get me to buy a car from them. Absolute great experience and professionalism.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
I walked away with a 2025 Mitsubishi Outlander, and I
I walked away with a 2025 Mitsubishi Outlander, and I couldn't be happier. If you want someone who will ensure you drive off in style and comfort (and maybe even make you laugh along the way), Enrico is your guy! Highly recommend?he?s the spark you need in your car-shopping adventure!
Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Excellent service from direct dealership, professional,
Excellent service from direct dealership, professional, understanding of customer needs, accommodating to co-applicant who was not in same city to help locate financing (which was straight forward/no hassle), along with extra support (as needed) to oversee signing of all paperwork.
Used
2021 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
Trae was outstanding in his customer service.
Trae was outstanding in his customer service. He listened to what we needed as well as wanted in a car and delivered. He made the buying experience one that normally is a stressful time into a relaxing one.
Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
My car buying experience was great.
My car buying experience was great. Edwin my salesman was awesome. He answered all of our questions. Was easy to deal with and made the car buying process painless. Did an amazing job on the walk around and delivery making sure to set up my phone, GMC app and demonstration all the features before leaving the lot. Ron in finance was great as well. Overall I am completely satisfied with the purchase of my new vehicle from Hiley GMC. Sincerely a 100% satisfies and loyal customer for life, Tony Bruncati
Used
2021 GMC Sierra 1500 SLT
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Features
Reviews
Very professional and friendly.
Very professional and friendly. Car was waiting for me when I arrived. They went out of their way to help me with my leased truck. I would recommend their dealership to anyone,
GMC Sierra 1500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 1500 | $57,006 | 2 Good deals |
| 2025 GMC Sierra 1500 | $51,834 | 19 Great deals |
| 2024 GMC Sierra 1500 | $49,970 | 19 Great deals |
| 2023 GMC Sierra 1500 | $43,293 | 14 Great deals |
| 2022 GMC Sierra 1500 | $41,291 | 13 Great deals |
| 2020 GMC Sierra 1500 | $32,911 | 11 Great deals |
| 2019 GMC Sierra 1500 | $31,375 | 18 Good deals |
| 2018 GMC Sierra 1500 | $24,389 | 6 Great deals |
| 2017 GMC Sierra 1500 | $23,869 | 6 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 $35,745, with pricing starting at $15,200.
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 in Southlake, TX
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2021 GMC Sierra 1500 in Westlake, TX
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2021 GMC Sierra 1500 in Roanoke, TX
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GMC Sierra 1500 trims
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GMC Sierra 1500 2021 SLT
11 Great Deals out of 26 listings starting at $24,500
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.
