Save your search and get notified when new inventory arrives.
Contact seller
Customize your budget
*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.
About your privacy: Cars.com is asking for your ZIP and credit rating because it helps us to make an educated guess at your sales tax and loan interest. These two factors can greatly change your monthly payment.
Used
2021 GMC Sierra 1500 trucks
for sale
near
Krum, 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 Denali
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
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
Features
Reviews
if you’re in the market for a brand new car, make sure
if you’re in the market for a brand new car, make sure you go see Jaymes Becker.
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 recently visited Credt Nissan of.
I recently visited Credt Nissan of. Frisco I was accompanied by a salesman named Terrance Coleman. Great guy very honest and made shopping. They’re very easy so if anyone try to buy a car from this dealership, please ask for this guy great guy thank you and you will thank me later
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
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 Elevation
Vehicle information
Features
Reviews
I recently purchased a vehicle from Top Line Auto, and
I recently purchased a vehicle from Top Line Auto, and the experience was outstanding from start to finish. The team was incredibly knowledgeable, attentive, and genuinely committed to making sure I found the perfect car. They went above and beyond in providing detailed information about the vehicle, including mileage, Carfax history, and available warranties, which made me feel confident in my purchase. The process was smooth and stress-free, with no pressure or rush to make a decision. I also appreciated their willingness to work with my schedule and accommodate my needs. The level of customer service at Top Line Auto is truly exceptional, and I would highly recommend them to anyone looking for a quality vehicle and a hassle-free buying experience.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
One of your managers, Israel went ABOVE and BEYOND to get
One of your managers, Israel went ABOVE and BEYOND to get us in the right car and make sure we were happy. We came in looking for a replacement vehicle for my son who totaled his car. We were originally looking at a different vehicle and he was able to put us into a better fit for my son going back to college. We struggled through the finance process and almost left the dealership but he was able to step in and make the numbers work. Finally, my mechanic found a small issue with the car within the 5 day buyback and he took care of the issue without hesitation. He gave is 5 STAR Service. Cannot recommend Autonation and Israel him enough.






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
I went in and looked at truck drove the truck and came
I went in and looked at truck drove the truck and came back after they got me financed, and it ended up taking the truck home. Great experience. I recommend them to anyone. They're looking for a nice truck.






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Great experience, and absolutely love our car and the
Great experience, and absolutely love our car and the service we received! Isaac showed up on his day off just to deliver our car to us. Excellent service!






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
AutoNation CDJR North Richland Hills performed an oil
AutoNation CDJR North Richland Hills performed an oil change and tire rotation and state inspection on my 2023 Ram 1500, July 25, 2025. The service reps all seem very professional. They offered me their shuttle service and had my truck done in about 2 1/2 hours. They did a great job! However, I noted that the tire rotation was not performed as per the manufacturer. All they did was move the fronts to the rear and the rears to the front. In accordance with the 2023 Ram 1500 owners manual the rear tires should have been crossed when bringing them to the front. The other noted issue I thought was huge safety issue, especially driving at night, was that for some reason the mechanic had turned my headlight switch to the off position. Turning that switch to the off position cancels every automatic function for your dash lights and center cluster (infotainment). By selecting the off position, ALL the dash and center infotainment lights go to FULL bright making it almost impossible to see anything outside the truck, especially with the 12 inch screen. It also prevents your steering wheel lights from coming on and prevents the high beams from functioning. I didn't know they had done this as I headed to work at 5 in the morning last Monday. I had pulled off the road twice on the way to work to try to troubleshoot the issue. It was useless because I couldn't see with the lights glaring in my eyes. I'm not sure why they had to mess with the headlight switch, but the least they could do is put the switch back where they found it. Would I recommend them to a friend, yes, BUT I'd warn them to verify their settings before needing them. And probably take it someplace else who knows how to rotate tires.






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.






Used
2021 GMC Sierra 1500 SLT
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.






Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
The customer service there is great every time.
The customer service there is great every time. The employees go beyond to make sure your vehicle is serviced 100% with a professional and positive attitude. I?m thankful to have a Honda from David McDavid Frisco Tx.






Used
2021 GMC Sierra 1500 Base
Vehicle information
Features
Reviews
Excellent experience with Tommy and the financing team,
Excellent experience with Tommy and the financing team, he got us exactly the car we wanted at the price that we wanted. Highly recommend for friends and family.






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Fantastic Mercedes GLC350e
I purchased a Mercedes GLC350e from Ali in 2020. i am in love with this car and will look forward to working with Ali in the future on all purchases






GMC Certified
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
New Avinir
Eric White and everyone at James Woods were absolutely perfect when I bought my 2024 Enclave Avinir. No service needed yet, but we will use James Woods when needed.






Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
No complaints.
No complaints. Service was excellent. Staff was friendly and helpful. Have a six year experience with Stonebriar Chevrolet and always recommend them.






Vehicle information
Features
Reviews
Working with Ethan on my 1st ever online purchase
Working with Ethan on my 1st ever online purchase - was the 1st experience everyone wants! He was efficient with communications, but never pushy. He was flexible and open to any questions, while walking me through the process! Friendly, knowledgeable, and great to work with. The financing process with David's help was a breeze! The process was time efficient and pretty flawless. He was on point with communication and very knowledgeable. Still loving my new car 2 months later- it exactly what I wanted and drives like a dream!!!






Used
2021 GMC Sierra 1500 SLT
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
Overall good experience with Aaron, Brendon, and
Overall good experience with Aaron, Brendon, and Angelica. No pressure sale, and a happy customer. Thanks!






Vehicle information
Features
Reviews
Almost glad I broke down so I could meet some of the most
Almost glad I broke down so I could meet some of the most friendliest people on the planet, if everybody gave service like that, they would be a lot more smiles around. Thank you very much for your kind polite service. The only shame is they don’t have 10 stars to give you.
-
Prev - 1
- 2
-
Next
GMC Sierra 1500 prices by year
Model year | Prices from | Deals |
---|---|---|
2026 GMC Sierra 1500 | $41,355 | |
2025 GMC Sierra 1500 | $39,144 | 6 Great deals |
2024 GMC Sierra 1500 | $39,999 | 7 Great deals |
2023 GMC Sierra 1500 | $28,977 | 6 Great deals |
2022 GMC Sierra 1500 | $35,897 | 15 Good deals |
2020 GMC Sierra 1500 | $28,314 | 15 Good deals |
2019 GMC Sierra 1500 | $21,455 | 9 Good deals |
2018 GMC Sierra 1500 | $22,000 | 7 Good deals |
2017 GMC Sierra 1500 | $21,781 | 11 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 $39,096, with pricing starting at $15,980.
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.
Similar Cars
-
Chevrolet Silverado 1500 for sale
15 Great Deals out of 72 listings starting at $20,500
-
Ford F-150 for sale
10 Great Deals out of 73 listings starting at $15,990
Research the 2021 GMC Sierra 1500
Compare the 2021 GMC Sierra 1500
2021 GMC Sierra 1500 by city
-
2021 GMC Sierra 1500 in Denton, TX
7 Great Deals out of 43 listings starting at $19,991
-
2021 GMC Sierra 1500 in Ponder, TX
4 Great Deals out of 32 listings starting at $26,902
-
2021 GMC Sierra 1500 in Sanger, TX
1 Great Deal out of 20 listings starting at $26,902
-
2021 GMC Sierra 1500 in Argyle, TX
7 Great Deals out of 47 listings starting at $19,991
-
2021 GMC Sierra 1500 in Corinth, TX
7 Great Deals out of 46 listings starting at $19,991
-
2021 GMC Sierra 1500 in Shady Shores, TX
7 Great Deals out of 46 listings starting at $19,991
-
2021 GMC Sierra 1500 in Northlake, TX
7 Great Deals out of 56 listings starting at $19,991
-
2021 GMC Sierra 1500 in Justin, TX
6 Great Deals out of 46 listings starting at $26,902
-
2021 GMC Sierra 1500 in Cross Roads, TX
7 Great Deals out of 40 listings starting at $19,991
-
2021 GMC Sierra 1500 in Lantana, TX
7 Great Deals out of 56 listings starting at $19,991
-
2021 GMC Sierra 1500 in Bartonville, TX
7 Great Deals out of 55 listings starting at $19,991
-
2021 GMC Sierra 1500 in Krugerville, TX
7 Great Deals out of 34 listings starting at $19,991
2021 GMC Sierra 1500 by body style
- ${price_badge()}
- ${ami_badge()}
- ${battery_badge()}${ev_report_link()}
- ${hot_car_badge()}
- ${award_badge()}
- ${cpo_badge()}
${price_badge_description}
${ami_badge_description}
The EV Battery Rating is based on this vehicle's current expected range relative to the vehicles expected range when new. ${battery_badge_text}
Certified cars are manufacturer warrantied and typically go through a rigorous multi-point inspection.
This car is likely to sell soon based on the price, features, and condition.
${award_blurb}
${award_two_blurb}