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Used
2021 GMC Sierra 1500 trucks
for sale
near
Fullerton, 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.
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Anthony sold me the 2020 Mazda 6.
Anthony sold me the 2020 Mazda 6. Super nice and very informative and fast too.
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
Aaron helped my husband with his new vehicle purchase.
Aaron helped my husband with his new vehicle purchase. My husband is very happy thanks !
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
Wonderful Dealership 😁
Everyone at Car Castle is wonderful including everyone in Management. Eddie in management was wonderful and assisted us with all the process. Come see them you won't be disappointed! 👍
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 SLT
Vehicle information
Features
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 !!!
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 Denali
Vehicle information
Features
Reviews
Had to get some warranty repairs done.
Had to get some warranty repairs done. Jeff took care of all the processing and we were informed about the progress from start to finish. Professional, courteous customer service.
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 Denali
Vehicle information
Features
Reviews
The entirety of my experience at Toyota of Corona was
The entirety of my experience at Toyota of Corona was exceptional. They were so friendly.
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Tuve una buena experiencia en esta tienda me explicaron
Tuve una buena experiencia en esta tienda me explicaron cada paso hasta asegurar que había comprendido Rolando y Carolina me ayudaron mucho
Vehicle information
Features
Reviews
The experience was great.
The experience was great. Worked the numbers over the phone and nothing changed when I arrived onsite. They value creating long term customers.
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!
Used
2021 GMC Sierra 1500 Denali
Vehicle information
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Reviews
So happy
Shawn was great and extremely helpful. He found a car that I absolutely love and worked with us to make sure it fit within our budget. Finance was helpful and so easy to work with.
Certified
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great service and great communication.
Great service and great communication. They gave me a rough estimate of what they thought was up and how long it might take. They were accurate and right. Laid out all the possibilities, then exceeded my expectations. Seriously exceeded my expectations. Thank you Michael Bobby. Great service and communication. I dealt with the three other dealerships in the Moreno / Riverside/ Redlands area before calling and then going to Fritts Ford. Redlands / Ken Grody said they had an appointment in three weeks ... Three Weeks! just to look at it. I double checked that offer with service to make sure I did not misunderstand. Other dealerships close by said they would take three days just to look at it. Then maybe tell me how much longer to fix it. Fritts Ford assessed it the next day and had it fixed in two days .. maybe specific to my issue, but still fantastic ... Not "Maybe we'll get back to you in three days then see how long to fix it" or "We'll see you in three weeks ... A and then we'll get back to you." When I offered to drop it off the day they would look at it they said that would just delay looking at it another 3-4 days. What?! The other dealerships were so disappointing on all fronts. I found a new dealership. Thanks Team Fritts. I'll be back.
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Smooth transaction and all the staff are very friendly.
Smooth transaction and all the staff are very friendly. My salesman that assisted me George was very helpful. Will do business again,
Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Thank you JStar!
A big thank you to the guys at J Star. From Jace helping us on the sales side to Chris in Finance. I would recommend J Star to anyone! Thank you.
Used
2021 GMC Sierra 1500 Elevation
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Features
Reviews
Love this place
Love this place , love the service, love how fast my process was to get into my M4 .best dealer I’ve ever made business, super polite , humble and very respectful, they even car washed the vehicle, man come one I was like whatttt!!! Super happy I drove out from Hollywood and I was not disappointed. Check it out for yourself!!!!!!
Certified
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Marco delivered excellent service!
Marco delivered excellent service!! Overall great customer service and very knowledgeable. Will continue scheduling with him.
Vehicle information
Features
Reviews
I called the dealership and spoke to Gary Koch.
I called the dealership and spoke to Gary Koch. I found him to be very personable and knowledgeable. We discussed the online price and agreed to purchase the car. I am not local and handled the preliminary paperwork over the phone. Once everything was confirmed I booked a flight and Gary offered to pick me up. I was in and out of the dealership in less than 90 minutes. Gary made the car buying process super easy and enjoyable. I also received an exceptional deal.
Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Very nice staff, I felt guided the entire time!
Very nice staff, I felt guided the entire time! Sammy and Rolando helped me out very much, making sure I knew what I was getting myself into and giving me the best options. They helped me buy a car and that feels great!
Used
2021 GMC Sierra 1500 SLT
Vehicle information
Features
Vehicle information
Features
Reviews
Quick and easy
Good quick service getting my new towing mirrors installed. Also cleared the check engine light. Steve Pacheco did a great job making the repair happen.
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GMC Sierra 1500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 1500 | $60,483 | 2 Good deals |
| 2025 GMC Sierra 1500 | $46,622 | 7 Great deals |
| 2024 GMC Sierra 1500 | $43,959 | 6 Great deals |
| 2023 GMC Sierra 1500 | $43,918 | 5 Great deals |
| 2022 GMC Sierra 1500 | $39,742 | 5 Great deals |
| 2020 GMC Sierra 1500 | $35,487 | 6 Great deals |
| 2019 GMC Sierra 1500 | $33,518 | 9 Good deals |
| 2018 GMC Sierra 1500 | $24,147 | 5 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 $36,088, with pricing starting at $13,980.
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.
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Research the 2021 GMC Sierra 1500
Compare the 2021 GMC Sierra 1500
2021 GMC Sierra 1500 by city
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2021 GMC Sierra 1500 in La Habra, CA
5 Great Deals out of 20 listings starting at $26,991
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2021 GMC Sierra 1500 in East Whittier, CA
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2021 GMC Sierra 1500 in Brea, CA
3 Great Deals out of 23 listings starting at $26,991
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2021 GMC Sierra 1500 in Buena Park, CA
4 Great Deals out of 20 listings starting at $26,991
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2021 GMC Sierra 1500 in La Mirada, CA
5 Great Deals out of 20 listings starting at $26,991
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2021 GMC Sierra 1500 in Anaheim, CA
3 Great Deals out of 23 listings starting at $26,991
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2021 GMC Sierra 1500 in La Habra Heights, CA
5 Great Deals out of 20 listings starting at $26,991
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2021 GMC Sierra 1500 in Rowland Heights, CA
4 Great Deals out of 25 listings starting at $26,991
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2021 GMC Sierra 1500 in South Whittier, CA
5 Great Deals out of 20 listings starting at $26,991
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2021 GMC Sierra 1500 by body style
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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.
