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*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.
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Used
2021 GMC Sierra 1500 AT4 trucks
for sale
near
Colleyville, 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.
Vehicle information
Features
Reviews
Their service department is simply first class, Trou Dunn
Their service department is simply first class, Trou Dunn was service consultant and he did a remarkable job getting our rather unusual problem with out Infinit solved.
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
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Reviews
Blessed by 5 Star Ford Lewisville tx
Hello 5Star Ford In Lewisville tx is great!! They greet you at the door with a smile!! Ready to help you!! Shout out to Tom and Ken yall number one!! I love my truck!! Y'all got busy and didn't stop until I was riding off in my new truck!! Thanks so very much!! I would send anyone y'all way!! Y'all are the best!! And thanks so very much I appreciate y'all!!!! 😊 what a clean peaceful place to shop at!!! If you need a car shop with them it's well worth every minute!! ✅
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
DeMeon Washington & Steve Williams were both friendly &
DeMeon Washington & Steve Williams were both friendly & professional. Process was easy & efficient, was prequalified online, in person interaction was great. Overall process was excellent we’re very pleased with this process, customer service and vehicle options. Highly recommend!
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.
Vehicle information
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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.
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Reviews
Buying a used car
Friendly, and helpful people. Trent went out of his way, to help me, and keep me informed. Hopper gave me a very good deal on my trade in. VIP treatment. I would buy from them, 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 AT4
Vehicle information
Features
Reviews
I have purchased cars from Sewell in the past and once
I have purchased cars from Sewell in the past and once again, their service and inventory is SUPERIOR! We are so happy with our vehicle and the overall experience!
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Reviews
I had a good experience at Eckert Hyundai, Chaz O'Connell
I had a good experience at Eckert Hyundai, Chaz O'Connell and Gavin Knighton were awesome to work with. They help me out without any pressure. I would go back to Eckert Hyundai in Denton again. Thank you.
Used
2021 GMC Sierra 1500 AT4
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Features
Reviews
Great truck, and the process is exactly as advertised!
Great truck, and the process is exactly as advertised! Brenda is amazing, and I'll work with her again any time a need arises!
Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Best Car Buying Experience Ever!!
Jose the Sales Manager listened to what I wanted and found the vehicle at another dealership and brought it over. Briana in Sales showed me all the features and explained how everything works. She even helped me get the app set up on my phone. David in Finance was so friendly and made the process easy. I have told all my friends how nice everybody was to me and this was really a no-stress day. I love them. I wish I could buy a new vehicle every year so I can go back over and over.
Used
2021 GMC Sierra 1500 AT4
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Reviews
I am Very happy with the service I received from
I am Very happy with the service I received from Vandergriff Acura Arlington on May 1, 2024. George Hardwick went over and above helping me do an oil change on my 2020 Alfa Romero. He was very pleasant and efficient. He is one of the reasons my wife and I purchased this Alfa Romero and 3 other car from this dealership over the years.
Used
2021 GMC Sierra 1500 AT4
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Features
Reviews
Thank you Robert and Don for your professionalism in
Thank you Robert and Don for your professionalism in attending to my car services I appreciate your attention to my car?s needs Exceptional customer service
Used
2021 GMC Sierra 1500 AT4
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Features
Reviews
The salesman, Joe Rodriguez, was very helpful and
The salesman, Joe Rodriguez, was very helpful and informative. I had no problem with communication. Everything was handled very Well. Everybody there was very professional. financing was excellent And I would definitely recommend this dealership. to anybody that was looking for a vehicle. Keep up the good work
Used
2021 GMC Sierra 1500 AT4
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Reviews
Erik, was my sales consultant.
Erik, was my sales consultant. They worked with me and got the price I wanted, helping me out. I traveled from over 140 miles one way to purchase vehicle. I would travel again to do it!!!! Also I don't want to forget Derek a director at Clay C. it was late when I arrived they where still glad to see me. Worked with me past business hours. These Guys were 👍 great to me..
Used
2021 GMC Sierra 1500 AT4
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Features
Reviews
I came in for the second time to get an oil change and it
I came in for the second time to get an oil change and it was a pleasant experience. I was helped by Taylor Jones who was wonderful and patient and answered all my questions. Thank you all for your help and I will definitely continue to have my service done at this location.
Used
2021 GMC Sierra 1500 AT4
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Reviews
Great dealership to work with.
Great dealership to work with. One of the easiest car buying experiences we have ever had.
Used
2021 GMC Sierra 1500 AT4
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Reviews
Todd is Great!!
Todd is great! He helped me all the way to buy a very nice Audi S8. Highly recommend this place, especially Todd. Thank you for making it happen.
Used
2021 GMC Sierra 1500 AT4
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 AT4
Vehicle information
Features
Reviews
Maarja was great and to the point.
Maarja was great and to the point. They were quick on my trade in and car purchased from them was great. Paper work done quick.
There are 20 matching cars close to your year range.
Used
2020 GMC Sierra 1500 AT4
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2022 GMC Sierra 1500 AT4
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2020 GMC Sierra 1500 AT4
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2022 GMC Sierra 1500 AT4
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2023 GMC Sierra 1500 AT4
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Used
2023 GMC Sierra 1500 AT4
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Used
2023 GMC Sierra 1500 AT4
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Used
2022 GMC Sierra 1500 AT4
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Used
2022 GMC Sierra 1500 AT4
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Used
2023 GMC Sierra 1500 AT4
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Used
2023 GMC Sierra 1500 AT4
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Used
2020 GMC Sierra 1500 AT4
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Used
2023 GMC Sierra 1500 AT4
Vehicle information
Features
Used
2023 GMC Sierra 1500 AT4
Vehicle information
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Used
2023 GMC Sierra 1500 AT4
Vehicle information
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Used
2023 GMC Sierra 1500 AT4
Vehicle information
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Used
2022 GMC Sierra 1500 AT4
Vehicle information
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Used
2020 GMC Sierra 1500 AT4
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GMC Certified
2023 GMC Sierra 1500 AT4
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GMC Sierra 1500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 1500 AT4 | $67,428 |
About the 2021 GMC Sierra 1500 AT4
AT4 shown.
- Seating
- 5
- Door count
- 4
- Drivetrain
- Four Wheel Drive
- Combined MPG
- 17
- Transmission
- 10-Speed A/T
- Engine
- 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)
How much does the 2021 GMC Sierra 1500 AT4 cost?
The 2021 GMC Sierra 1500 AT4 price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 1500 AT4 is $40,073, with pricing starting at $27,500.
What is the MPG of the 2021 GMC Sierra 1500 AT4?
The 2021 GMC Sierra 1500 AT4 offers up to 15 MPG in city driving and 21 MPG on the highway for a combined rating of 17 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 options, driving conditions, driving habits, vehicle maintenance, and other factors.
What are some similar vehicles and competitors of the 2021 GMC Sierra 1500 AT4?
The 2021 GMC Sierra 1500 AT4 compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 1500 AT4 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.
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) |
*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 by city
-
2021 GMC Sierra 1500 AT4 in Westlake, TX
4 Great Deals out of 20 listings starting at $30,281
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2021 GMC Sierra 1500 AT4 in Trophy Club, TX
4 Great Deals out of 20 listings starting at $30,281
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2021 GMC Sierra 1500 AT4 in Roanoke, TX
4 Great Deals out of 20 listings starting at $30,281
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2021 GMC Sierra 1500 AT4 in Double Oak, TX
3 Great Deals out of 20 listings starting at $30,281
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2021 GMC Sierra 1500 AT4 in Bartonville, TX
3 Great Deals out of 20 listings starting at $30,281
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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.
