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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 trucks
for sale
near
South Monrovia Island, CA
- 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
Bryan was extremely professional and helpful.
Bryan was extremely professional and helpful. The process was seamless. Everyone was easy to work with and extremely honest. We will definitely come back and we will definitely recommend to friends and family.
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
Excellent service
Excellent service here. Totally professional and very kind. I have nothing but positive things to say about them. Thank you very much David and P!
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...






Vehicle information
Features
Reviews
Best Car Buying Experience!
The experience here at Car Castle was by far the Best car buying experience my wife and i have ever had. Thank you Eddie the (Manager) for helping and assisting us with the whole buying process and for giving us a Great Deal!
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.






Certified
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Integrity
The owner, GM and Michael Faina all dealt with me with integrity and honesty. It?s a rough time right now for auto sales and they went out of their way to take great care of me in buying my first truck.
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
Excellent Teck!
just want to let "Nick" in Electrical Tech dept Great Job!!!., Thanks! for finding the electrical problem with our 2014 Accent, and because of all the great service and help we received, we will keep coming back to Puente Hills Service. And also"Micah" for being on top of things and keeping me informed of my vehicle.
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
Victoria Gia and her sales manager did an excellent job
Victoria Gia and her sales manager did an excellent job of helping us without being too pushy. They stayed late after the dealership was closed to help us.






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Salesman very professional and polite.
Salesman very professional and polite. He answer all of my questions. He made my car buying very easy. At the end of the deal he walked me through different options my vehicle came with. Again salesman was very professional






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Salesman Esteban was very polite, explained the details
Salesman Esteban was very polite, explained the details of the car and we appreciate his hospitality! Thank you Esteban. We look forward to enjoying all the luxury of the car! I am very happy for my daughter and she deserves the best so again thank you Esteban.






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
first time buying experience went great Thanks you
first time buying experience went great Thanks you Esteban Diaz, Amir Nasiri and Tom Cruz.






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
I bought a used car that was highly sought after, based
I bought a used car that was highly sought after, based on it having only 2k miles per year and it's price point. I worked with Ed, who went out of his way not only to reassure me that I had secured my spot as the buyer, but also provide me with photos and updates as the car went through the reconditioning and detailing process. Ed was extraordinarily responsive, answering my (many) texts within minutes! Ed demonstrated exceptional professionalism, caring and compassion. I would buy another car from him in a heartbeat.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Lisa Briton provided excellent customer service and kept
Lisa Briton provided excellent customer service and kept me informed about the repairs to my vehicle. She was very knowledgeable about the mechanics of the vehicle and what needed to be repaired and explained very thoroughly.






Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Buying a Used CX9 from Cardinale Mazda of Corona
After 3 trips to the dealership we wound up buying the used 2022 CX-9 we had been looking at all along. We appreciated the courtesy, professionalism, knowledge of the product, and minimal sales pressure of Taylor, the sales rep. He went out of his way to help us before, during, and after the selling process. The only reason for our review's less than perfect 5 is that a follow up email to obtain contract information, and a postal mailing of an owner's manual were both forgotten resulting in us having to make needless 25 mile drives back to the dealership. These were promised by a finance person, not the sales person.






Used
2021 GMC Sierra 1500 Base
Vehicle information
Features
Reviews
5 stars!
5 stars! Fernando and the staff at CarPlus.com exceeded my expectations. They provided top-notch service, expert knowledge, and a friendly attitude, making my car-buying experience seamless. I'm extremely pleased and highly recommend them!






GMC Certified
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
minhphm9@yahoo.com
Good job, Great service, thank you. I will alway bring my car here






Vehicle information
Features
Reviews
Car Castle is Awesome!!
Car Castle by far the best customer service, from sales rep to management Eddie everyone here is wonderful.Thank you Car Castle for my new Van!






Vehicle information
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Reviews
This was one of the best experiences I had purchasing a
This was one of the best experiences I had purchasing a vehicle everyone was kind a very knowledgeable. This was the quickest I've ever purchased a car thank u !!!
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Used
2021 GMC Sierra 1500 Elevation
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Used
2021 GMC Sierra 1500 Elevation
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Used
2021 GMC Sierra 1500 Elevation
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Used
2021 GMC Sierra 1500 AT4
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Used
2021 GMC Sierra 1500 Denali
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Used
2021 GMC Sierra 1500 Elevation
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Used
2021 GMC Sierra 1500 SLT
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Used
2021 GMC Sierra 1500 Denali
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Used
2021 GMC Sierra 1500 Elevation
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Certified
2021 GMC Sierra 1500 AT4
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GMC Sierra 1500 prices by year
Model year | Prices from | Deals |
---|---|---|
2026 GMC Sierra 1500 | $50,870 | |
2025 GMC Sierra 1500 | $31,643 | 4 Good deals |
2024 GMC Sierra 1500 | $34,250 | 20 Good deals |
2023 GMC Sierra 1500 | $30,988 | 8 Good deals |
2022 GMC Sierra 1500 | $36,669 | 9 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 $39,074, with pricing starting at $14,995.
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.
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.
Research the 2021 GMC Sierra 1500
Compare the 2021 GMC Sierra 1500
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