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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
Grapevine, 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
Reviews
Great car buying experience
We were very pleased with our experience. Don was very quick to return my initial communication. He explained the procedure for us meeting and had the car ready for our examination. All care was taken to insure the cleanliness and contamination free condition of the car. The procedure for purchasing the car was smooth and followed social distancing standards. We could not be any happier with how we were treated.
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
Chance is wonderful!
Chance is wonderful! He was so very helpful and patient and helped us find the perfect car for my mom!
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
Ben, Freddie and Alberto were all very helpful in the
Ben, Freddie and Alberto were all very helpful in the purchase of a used vehicle, along with our trade-in. Each of them were very courteous and answered all of our questions. We are quite happy with our purchase and the efforts of all those involved in a smooth, efficient and personable experience.
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
Our work vehicle had some recalls due, and needed a new
Our work vehicle had some recalls due, and needed a new seal around the windshield and I booked the repairs via online services and was able to get a convenient appointment date/time very quickly. The service representative, Paul Segars was awesome and kept us up to date on the status of the vehicle. Vehicle was ready faster than expected and very much appreciated!
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.






Vehicle information
Features
Reviews
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!






Vehicle information
Features
Reviews
I hate singing the service for an intermittent issue
I hate singing the service for an intermittent issue likely caused by a computer chip, on board computer or software but it a serious issue when the Adaptive Cruise control just locks the brakes up at cruising speeds over 55 MPH. I am hopeful they will eventually figure out the issue. This time I requested they just deactivate Adaptive Cruise as I?m worried about serious injury. The last time the brakes locked up out of the blue, I almost lost control of the vehicle and it slide sideways almost flipping at 70 MPH.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
I went to Grand Prairie Ford on short notice and was able
I went to Grand Prairie Ford on short notice and was able to get the vehicle I needed for my wife and get it done very quickly. Cruz was my sales rep and worked with him and the management group to get the transaction done flawlessly. I am not the easiest customer to deal with, but the guys handled the situation professionally and got me exactly what I wanted and needed. Our 2024 Expedition Max Limited is fantastic and I will do business with these guys in the future. GS






Vehicle information
Features
Reviews
Mrs. W
They are the best, answering any and all questions, friendly, courteous, professional. They do everything to help you decide which vehicle works best for you






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Chris Pingel made the car buying experience fast & easy.
Chris Pingel made the car buying experience fast & easy. Had me leaving with a brand new truck! When you go to Hiley GMC, definitely ask for Chris.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
In and out!
In and out! And took the time to answer any questions I had. Even checked in on us afterwards to make sure I?m satisfied.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Competitive pricing, professional service, quick response
Competitive pricing, professional service, quick response time, and a fantastic overall experience. The entire process was low stress, which was very much valued and appreciated. Highly recommend any of the Hiley dealerships for your automotive needs.




Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Outstanding service in all departments!
Outstanding service in all departments! They are the epitome of the gold standard. I highly recommend






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
This was my 2nd time buying from this same dealership.
This was my 2nd time buying from this same dealership. Made buying so easy and simple the 1st time that I headed straight to them again for the 2nd.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Great experience all the way around.
Great experience all the way around. From the salesman I worked with, to sales manager, finance guy…. Overall the best experience I’ve had buying a vehicle. 10/10 recommend and will use them again.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
It is a sweet experience to get service done here!
It is a sweet experience to get service done here! Everyone is always so kind and helpfull






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
⭐⭐⭐⭐⭐ For Otto Source!!!
I been looking long and hard for the right vehicle. I don't have the best credit. So most dealers just blew me off. But not Otto Source they treated me with respect. As if my credit was perfect. Todd Price my salesman was Amazing found me the perfect vehicle A Cadillac SRX loaded with every option you could possibly want. If your looking for that perfect vehicle and don't want to get the run around. Go to Otto Source and ask for Todd Price!!!⭐⭐⭐⭐⭐






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Vary nice people, vary good at helping In explaining
Vary nice people, vary good at helping In explaining about the car,and the price. I was not able to go to get the car do to Family issues.






Vehicle information
Features
Reviews
2022 Acura MDX purchase
Suave was our salesperson, he is friendly, funny and courteous. Salesperson , manager and finance person were very professional and respectful of my time and money. This dealership is quite a distance from my home but I’d happily return for another great deal on a vehicle.




Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Service department is top notch.
Service department is top notch..best of the best! Friendly yet professional, capably handled my every concern. Ride to/from my office very nice and appreciated touch!






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Bought a cargo van for our company and had a great
Bought a cargo van for our company and had a great experience! Buying another one next month!
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GMC Sierra 1500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 1500 AT4 | $61,260 | 4 Good deals |
About the 2021 GMC Sierra 1500 AT4
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 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 $42,138, with pricing starting at $29,950.
What is the MPG of the 2021 GMC Sierra 1500 AT4?
The 2021 GMC Sierra 1500 AT4 offers up to 18 MPG in city driving and 21 MPG on the highway for a combined rating of 19 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.
Is the 2021 GMC Sierra 1500 AT4 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
*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 Southlake, TX
2 Great Deals out of 23 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in Colleyville, TX
2 Great Deals out of 23 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in Euless, TX
2 Great Deals out of 23 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in Bedford, TX
2 Great Deals out of 23 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in Irving, TX
1 Great Deal out of 20 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in Westlake, TX
2 Great Deals out of 20 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in Trophy Club, TX
2 Great Deals out of 20 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in Keller, TX
2 Great Deals out of 23 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in Hurst, TX
2 Great Deals out of 23 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in North Richland Hills, TX
2 Great Deals out of 24 listings starting at $31,981
-
2021 GMC Sierra 1500 AT4 in Roanoke, TX
2 Great Deals out of 20 listings starting at $31,981
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2021 GMC Sierra 1500 AT4 in Watauga, TX
2 Great Deals out of 23 listings starting at $31,981
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