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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
2020 GMC Sierra 1500 trucks
for sale
near
Whitefish Bay, WI
- 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
2020 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Shelby did a wonderful job getting us into not one car
Shelby did a wonderful job getting us into not one car but two cars that were exactly what we wanted and also met our needs. He is extremely professional and a personable person at the same time. Our experience at Frank Boucher Kia Volkswagen of Racine has been a pleasure. We love our new KIA Soul and KIA Sorento!
Great truck!
I bought my 2020 with 36k miles a couple of years ago and I now have 60k miles of trouble free very enjoyable driving. It was expensive, but worth every penny. The ride is so quiet and comfortable my wife and I prefer traveling in it instead of our 2018 Acura MDX which we also love. The 5.3 V8 has plenty of power and towing ability. The multi-function tail gate is genius, I hope to never be without one again. We so enjoy all the bells and whistles, especially the wireless phone charger. So glad I bought this truck!






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Went in for oil change and tire rotation Prince took care
Went in for oil change and tire rotation Prince took care of it in a very friendly and professional way. I even got complementary car wash. Very happy customer! Thank you!!
Short turn radius
I purchased pre-owned 2020 1500 SLT in February of this year. The truck rides comfortable and has plenty of room front and rear. My and I both enjoy it. My only drawback is the turn radius (lock to lock). It lacks compared to my wife's 2018 Yukon SLT, or the 2016 Ram I traded in. Have to many times maneuver twice to park it going forward or reverse. Otherwise happy with our purchase.






Used
2020 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
It was time to move on from our 2002 Oldsmobile after 20
It was time to move on from our 2002 Oldsmobile after 20 years. It’s been that long since I’ve been to a car dealership or even test drove a newer vehicle so I had little a trepidation about purchasing a new vehicle. I did my research and decided that I wanted a 2024 Hyundai Tuscan hybrid. I cannot express how painless the process was- no pressure. Dakota, our salesperson, is incredibly knowledgeable, patient, and perceptive. The service staff is professional and approachable. Financing was smooth and efficient. The inventory is impressive but if Boucher doesn’t have what you’re looking for I’m sure they can find it. We both are very happy.
Great Truck
I did my research and test drove several models. The GMC 1500 Duramax does everything I want it to do and more. Great gas milage, nice power and very comfortable.






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Very helpful with car purchase as well as car
Very helpful with car purchase as well as car service/maintenance. Tim was a great help.
Best truck we have owned!
Truck meets my and my wife's needs. She loves her and I do to! Love sport mode and the tow hail mode. Rides like a Cadillac!






Used
2020 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
I’ve always received great service at this location.
I’ve always received great service at this location. Dominic and Mike were extremely courteous and helpful in helping me navigate my end of lease options. Highly recommend stopping in and doing business with Boucher Hyundai of Waukesha!
Best truck I’ve bought
The features and styling are very aesthetic. The truck has very smooth handling and response. I am impressed with the response from the Diesel engine.






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Friendly service!
Friendly service! Made buying a car fun and easy! Thank you for the hard work!


Certified
2020 GMC Sierra 1500 ELEVATION
Vehicle information
Reviews
Scott in sales was a huge help.
Scott in sales was a huge help. Great car buying experience, very easy! I highly recommend.






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
I had a nice experience at this dealership.
I had a nice experience at this dealership. Danny was very helpful and didn’t make me feel pressured. Leo did my paperwork when the finance department was busy!






GMC Certified
2020 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Had the pleasure of having Nick Majeske provide us with
Had the pleasure of having Nick Majeske provide us with an unbelievable experience of buying a new car. From start to finish and even after we purchased our car, his support and genuine desire to make sure we were satisfied did not go unnoticed. What really stood out to us was throughout the process, Nick was transparent and honest, which I greatly appreciated. He kept us informed every step of the way, and there were no surprises or hidden fees. His professionalism and integrity are truly commendable. We could not be happier with our purchase and overall experience throughout it all, and we would like to think this was in all thanks to Nick.






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Trade in value was more than was first anticipated.
Trade in value was more than was first anticipated. Sales person and finance individual was extremely professional. Wouldn’t hesitate dealing with them again. Thank you guys. You did perfect.






Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
I always bring my car here for service- they are honest
I always bring my car here for service- they are honest and good at doing the work that needs to be done






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
We just leased our 12th and 13th Honda from Zeigler Honda
We just leased our 12th and 13th Honda from Zeigler Honda and wouldn’t go anywhere else! Salesman Josh and Finance manager Nick are simply the best to work with! 2 leased car deals completed and cars delivered in less than 24 hours with a great deal too! Thanks guys!






Vehicle information
Features
Reviews
I like how Omar the seller was helping me out on getting
I like how Omar the seller was helping me out on getting the perfect truck for me thanks to Omar because I?m very happy with my new truck






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Positive experience
No pressure car buying experience with Chad Braeger. He answered all our questions that we had. When I went back a week later to pick up the vehicle from having accessories installed, Chad met me at the door and answered any follow up questions I had with the vehicle.






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Sales staff and our salesman Nick was very professional
Sales staff and our salesman Nick was very professional and accommodating to my wife and I for our specific situation and worked out a deal that we were very thankful for! Highly recommended dealer and we are sure we will do business with them in the future for sure!






Used
2020 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
Purchased a new Seltos
We leased a 2021 Kia Seltos thru Dennis Cardinal. This is actually the second time we leased from him. The first vehicle was a Kia Soul. Both were excelent experiences.

Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
She will help you get into the car u want
Tiara was very helpful and professional. I will recommend to family and friends to talk to her if looking for a new car she definitely went above and beyond






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Had a great experience at Zeigler Toyota.
Had a great experience at Zeigler Toyota. I worked with Leeann who was amazing! I had a very specific car I wanted which needed to be ordered. It took a bit because they had to build it but Leeann kept me in the loop the whole way and as soon as it arrived she let me know and I was onsite in no time. Leeann did a great job of showing me all of the features and took her time to make sure I felt comfortable and satisfied with my purchase. If you are in the market for a car definitely ask for Leeann she’ll take great care of you! Love my new car!
Used
2020 GMC Sierra 1500 SLE
Vehicle information
Features
There are 20 matching cars close to your year range.






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2019 GMC Sierra 1500 Elevation
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2022 GMC Sierra 1500 AT4
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2018 GMC Sierra 1500 SLT
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2021 GMC Sierra 1500 AT4
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2019 GMC Sierra 1500 SLT
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GMC Certified
2022 GMC Sierra 1500 SLT
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2022 GMC Sierra 1500 AT4
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2021 GMC Sierra 1500 Denali Ultimate
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2019 GMC Sierra 1500 Denali
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2022 GMC Sierra 1500 SLT
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2021 GMC Sierra 1500 Elevation
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2021 GMC Sierra 1500 AT4
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2021 GMC Sierra 1500 Denali
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2019 GMC Sierra 1500 SLE
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2019 GMC Sierra 1500 Denali
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Used
2022 GMC Sierra 1500 SLT
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GMC Certified
2022 GMC Sierra 1500 Denali
Vehicle information
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Vehicle information
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Vehicle information
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Used
2021 GMC Sierra 1500 AT4
Vehicle information
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GMC Sierra 1500 prices by year
Model year | Prices from | Deals |
---|---|---|
2026 GMC Sierra 1500 | $49,819 | |
2025 GMC Sierra 1500 | $36,199 | |
2024 GMC Sierra 1500 | $36,999 | 5 Great deals |
2023 GMC Sierra 1500 | $34,500 | 27 Good deals |
2022 GMC Sierra 1500 | $34,799 | 18 Good deals |
2021 GMC Sierra 1500 | $30,999 | 16 Good deals |
2019 GMC Sierra 1500 | $27,780 | 9 Good deals |
About the 2020 GMC Sierra 1500
Base shown (base trim).
- Seating
- 3
- Door count
- 2
- Drivetrain
- Rear-wheel drive
- Combined MPG
- 17
- Transmission
- 6-Speed A/T
- Engine
- 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability)

How much does the 2020 GMC Sierra 1500 cost?
The 2020 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 2020 Sierra 1500 is $36,354, with pricing starting at $15,799.
What is the MPG of the 2020 GMC Sierra 1500?
The 2020 GMC Sierra 1500 offers up to 15 MPG in city driving and 21 MPG on the highway for a combined rating of 17 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 2020 GMC Sierra 1500?
The 2020 GMC Sierra 1500 compares to and/or competes against the following vehicles:
Is the 2020 GMC Sierra 1500 reliable?
The 2020 GMC Sierra 1500 has an average reliability rating of 4.7 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 1500 owners.
Is the 2020 GMC Sierra 1500 a good truck?
Below are the Cars.com consumer ratings for the 2020 GMC Sierra 1500.
- Comfort 4.9
- Interior 4.8
- Performance 4.8
- Value 4.6
- Exterior 4.9
- Reliability 4.7
91% of drivers recommend this car
- Comfort 4.9
- Interior 4.8
- Performance 4.8
- Value 4.6
- Exterior 4.9
- Reliability 4.7
AT4 (3 styles)
Style | ||
---|---|---|
4WD Double Cab 147" AT4 | 4WD Crew Cab 157" AT4 | 4WD Crew Cab 147" AT4 |
Inventory price | ||
Starting at $51,300 | Starting at $54,000 | Starting at $53,700 |
Combined MPG | ||
18 | 18 | 18 |
Engine | ||
420.0-hp, 6.2-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) |
Base (8 styles)
Style | |||||||
---|---|---|---|---|---|---|---|
4WD Crew Cab 157" | 2WD Double Cab 147" | 2WD Crew Cab 147" | 4WD Double Cab 147" | 2WD Crew Cab 157" | 4WD Crew Cab 147" | 4WD Reg Cab 140" | 2WD Reg Cab 140" |
Inventory price | |||||||
Starting at $39,500 | Starting at $33,500 | Starting at $35,900 | Starting at $36,800 | Starting at $36,200 | Starting at $39,200 | Starting at $34,200 | Starting at $29,600 |
Combined MPG | |||||||
20 | 20 | 20 | 20 | 20 | 20 | 17 | 17 |
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) | 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 (4 styles)
Style | |||
---|---|---|---|
2WD Crew Cab 157" Denali | 4WD Crew Cab 147" Denali | 4WD Crew Cab 157" Denali | 2WD Crew Cab 147" Denali |
Inventory price | |||
Starting at $55,400 | Starting at $58,600 | Starting at $58,900 | Starting at $55,100 |
Combined MPG | |||
19 | 18 | 18 | 19 |
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) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) |
Elevation (6 styles)
Style | |||||
---|---|---|---|---|---|
4WD Crew Cab 157" Elevation | 2WD Double Cab 147" Elevation | 2WD Crew Cab 157" Elevation | 2WD Crew Cab 147" Elevation | 4WD Double Cab 147" Elevation | 4WD Crew Cab 147" Elevation |
Inventory price | |||||
Starting at $46,500 | Starting at $40,500 | Starting at $43,200 | Starting at $42,900 | Starting at $43,800 | Starting at $46,200 |
Combined MPG | |||||
20 | 21 | 21 | 21 | 20 | 20 |
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) |
SLE (6 styles)
Style | |||||
---|---|---|---|---|---|
2WD Crew Cab 157" SLE | 2WD Double Cab 147" SLE | 4WD Double Cab 147" SLE | 2WD Crew Cab 147" SLE | 4WD Crew Cab 157" SLE | 4WD Crew Cab 147" SLE |
Inventory price | |||||
Starting at $40,700 | Starting at $38,000 | Starting at $41,300 | Starting at $40,400 | Starting at $44,000 | Starting at $43,700 |
Combined MPG | |||||
21 | 21 | 20 | 20 | 20 | 20 |
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) |
SLT (6 styles)
Style | |||||
---|---|---|---|---|---|
4WD Crew Cab 147" SLT | 2WD Crew Cab 147" SLT | 4WD Crew Cab 157" SLT | 4WD Double Cab 147" SLT | 2WD Double Cab 147" SLT | 2WD Crew Cab 157" SLT |
Inventory price | |||||
Starting at $50,400 | Starting at $46,900 | Starting at $50,700 | Starting at $48,000 | Starting at $44,500 | Starting at $47,200 |
Combined MPG | |||||
18 | 19 | 18 | 18 | 19 | 19 |
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) | 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) | 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) | 355.0-hp, 5.3-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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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.