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Used
2021 GMC Sierra 1500 trucks
for sale
near
Millstone, NJ
- 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 Elevation
Vehicle information
Features
Reviews
Came in with bad credit and initially wasn’t hopeful on
Came in with bad credit and initially wasn’t hopeful on even leaving with a car but ended up getting a good rate and there was Transparency from the whole team,Didn’t get the names of everyone but got assistance from Hakeem Blake and he was honest and truthful through the whole process and got us a good deal. Would recommend this dealership for sure they were professional and well knowledgeable on the process.
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 Elevation
Vehicle information
Features
Reviews
Guy always takes care of me.
Guy always takes care of me. Very happy to work with him. Always get a call on the status.
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
Erica from Miller sales beat every dealers out the door
Erica from Miller sales beat every dealers out the door price on a new truck and then told me she could beat my credit unions rate. She did by 2.5% and the manager gave me an extra 1000 off for financing through Ford AFTER I was approved at a lower rate. True sales lady that cuts through all the unwanted salesman tactics. Erica knows her job and is supported by an honest manager. Best car buying experience in 20 years and I buy a new vehicle every two years. Finding a service dept that is just as great was the icing on the cake. Mark had my truck prepped exactly as I asked when had my first service done. Miller w Erica has my family's Ford buisness from now on.
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 Denali
Vehicle information
Features
Reviews
We recently purchased a 2003 Ford Thunderbird from
We recently purchased a 2003 Ford Thunderbird from Highline Motor Cars. Ali was our salesperson and he was very helpful. After looking around for this particular model, we found exactly what we were looking for. Ali gave us a good deal and was upfront regarding some routine maintenance the car would need. The car itself was in fabulous condition for it's age! We now have our "retirement" car to take weekend rides! Thank you to Ali and the crew for even offering us lunch! I was waiting for the weather to break (finally) to take a nice drive down the shore and we are in love! Thank you again Highline! We recommend your dealership for a good deal and honesty!
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 SLT
Vehicle information
Features
Reviews
Nice work, clean facility, courtesy and amaability,
Nice work, clean facility, courtesy and amaability, overall good job !!!bla, bla, bla, bla, bla, more and more and more bla bla bla bla blaaaaa
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!






GMC Certified
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
A surprisingly pleasant experience
Best experience I've ever had with a dealership service department! Michelle and Jack picked up my car and returned it to me!! Friendly, clean, pleasant and competent. So rare these days. I would recommend them highly, especially over Freehold Buick. Freehold Buick tried to rip me off on several occasions. They lied to me and were disrespectful. I'll never go back to Freehold Buick, but look forward to working with Jim Curley Buick of Keyport in the future. Thanks so much.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
I purchased a used vehicle on May 10 of 2025.
I purchased a used vehicle on May 10 of 2025. I actually started the purchase on May 1, but it was for my business and took a little bit longer to secure funding, etc. I work with Frank, who was amazing. He was patient, kept me informed, helped me along in the process, and delivered the vehicle so smoothly. Zach, the finance gentleman, was also amazing. The entire process was smooth and easy, and I would absolutely go back.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
I bought a Honda Civic from them immediately at the
I bought a Honda Civic from them immediately at the service station, and everything is fine. Didn't regret it.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
I was going to update my Ford escape to Lexus.
I was going to update my Ford escape to Lexus. Salesman Derek Massio, was helping me get a good deal. He was answering my questions and I going few times for testing out and checking the car. They offered me to purchase extra warranty and protection, but it’s optional. Overall have a good experience with the dealer. Before I go there I have a text message and email. The car was plug in, so should be charged battery before my appointment. Thank you.






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Great place to buy a new or used car or truck.
Great place to buy a new or used car or truck. Pat Daly was very professional and helpful with the sale.






GMC Certified
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Great experience from start to finish.
Great experience from start to finish. Had everything ready for me when we arrived. Car was started and heated up for us to test drove.






Used
2021 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Thank you for the service!
Thank you for the service! I chose the Ford Edge Sport because of the reliability of the brand. The manager explained everything, helped with the paperwork, and the bank quickly agreed on the terms of the installment plan. The car is in excellent condition, the purchase was simple and pleasant.






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Great experience
My husband and I stoped by to look at a VW Jetta for our daughter. At the time, the car was not at this location. Lou made sure the car was there the next morning and we were able to take a look. Over the next few days, Lou was extremely patient with our hectic schedule as we completed the process of buying the car. My husband and I both agree, this was the best used car experience we have ever had, with outstanding customer service from Lou and his team. We would definitely go back the next time we are looking to purchase a car. Thanks Lou!
Used
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
We bought a car here for our family - it turned out to be
We bought a car here for our family - it turned out to be exactly the option we were looking for. The car is extremely comfortable, reliable and meets all our needs. The service was very pleasantly surprised: attentive attitude, honest advice and a sincere desire to help. It is rare to find such professionalism anywhere.

GMC Certified
2021 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
WOW!
WOW! Truly speechless. From start to finish, this was hands-down the best experience I?ve ever had. Incredible communication, top-tier service, and just a total pleasure overall!






Used
2021 GMC Sierra 1500 Denali
Vehicle information
Features
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2023 GMC Sierra 1500 Elevation
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2022 GMC Sierra 1500 Denali
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GMC Sierra 1500 prices by year
Model year | Prices from | Deals |
---|---|---|
2026 GMC Sierra 1500 | $54,895 | |
2025 GMC Sierra 1500 | $40,930 | |
2024 GMC Sierra 1500 | $40,985 | 6 Great deals |
2023 GMC Sierra 1500 | $37,875 | 6 Great deals |
2022 GMC Sierra 1500 | $30,800 | 7 Great deals |
2020 GMC Sierra 1500 | $21,995 | 6 Good deals |
2019 GMC Sierra 1500 | $23,999 | 8 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 $39,138, 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.
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