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Used
2020 GMC Sierra 1500 trucks
for sale
near
Mukwonago, 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 AT4
Vehicle information
Features
Reviews
Everyone was very polite and friendly Tim was very
Everyone was very polite and friendly Tim was very helpful and and courteous he went above and beyond to get my car repaired and can?t wait to come back in for normal service
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 Elevation
Vehicle information
Features
Reviews
Fantastic employee assistance and buying experience.
Fantastic employee assistance and buying experience. Huge thanks to “LJ” and Dogan for getting me hooked up with an amazing Toyota Camry
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 Elevation
Vehicle information
Features
Reviews
Terrific Renegade Purchase Experience!
I recently purchased a car at Kayser and had the good fortune to have Scott Bornick as my salesman. Scott was great throughout the whole experience. Professional and knowledgeable, he made the whole process seamless. This was my first purchase at this dealership and I highly recommend them!
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 Denali
Vehicle information
Features
Reviews
I had an outstanding experience working with Ty on my
I had an outstanding experience working with Ty on my recent vehicle purchase. He was consistently responsive, knowledgeable, and never pushy throughout the process. We don’t purchase new vehicles often, but when the time comes again, I will certainly return to Ty. I highly recommend him to anyone looking for a straightforward and positive buying experience.
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!






Vehicle information
Features
Reviews
Eli Cocom provided exceptional customer service.
Eli Cocom provided exceptional customer service. I would recommend this establishment to any of my friends and guide them to Eli for any help. He provided the information for my future visits and was extremely patient.
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
Sales person great.
Sales person great. Sales manager and finance felt disingenuous, not what I’d expect from bmw dealership. Not sure quality of vehicles.






Used
2020 GMC Sierra 1500 SLE
Vehicle information
Features
Reviews
Great place to make a great deal on a new Kia Seltos EX.
Great place to make a great deal on a new Kia Seltos EX. All of the people working there were fabulous. They took that nasty, anxious edge of buying a car and tossed it right in the garbage 🗑️ Anna was a special lady and very informative and gracious to us. She answered all questions and helped iron out various small things along our journey at Russ Darrow in Waukesha. Best Deal Ben came alongside Anna and really helped to seal this deal for us. No problem or pressure for us at all. Anna listened to our story and empathized with us. She really helped us out. Shannon in finance was terrific and she went above and beyond to assist us, explaining different items and financing options for us. GREAT experience, please give Anna the Best salesperson award for at least the month of April 2024. Thanks again for the nice experience of buying from your dealership.






Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Ours sales person was excellent, without Cecilia I don?
Ours sales person was excellent, without Cecilia I don?t think we would of made it through the long process. Getting a trade in for our car took way to long. They need speed up the process! Also the finance part was backed way up and also need to speed that up!






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Follow up review on 2015 online Suburban purchase.
Follow up review on 2015 online Suburban purchase. Dealership went above and beyond to make things right and actually took responsibility for the items that needed attention. I went from never going back there to being their number one fan. Great customer service after the sale! Great working with you all!






Vehicle information
Features
Reviews
Took my truck in for maintenance and decided to trade in
Took my truck in for maintenance and decided to trade in for new car. Jordan was very professional and patient. My 3rd time buying at Nissan Kenosha and won't be my last.






Used
2020 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Great service team
The team was able to figure out the electronic issue we were having with the van and create a plan for rectifying the problem when we return from our planned trip.






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Mario’s Bariampas and Gabriel Jimenez went above and
Mario’s Bariampas and Gabriel Jimenez went above and beyond making my Civic purchase possible.






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Excellent always satisfied when I leave the dealership.
Excellent always satisfied when I leave the dealership. Salesman Matt Kreckler and Service Advisor Craig Pozarski very efficient and knowledgeable. A pleasant experience as usual.






Used
2020 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Really Great people to work with.
Really Great people to work with. Mr. Lee McGee did everything he could do to help me with my Purchase. Highly Recommend.






Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
Ms. B
Excellent, from the day I walked in to finance my truck every member from Sales to Finance were 100% committed to the sale. My process was hassle free






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Tim Cameron is an amazing Service advisor!
Tim Cameron is an amazing Service advisor! I work with him every time I go, he is polite, professional, and thorough. Thanks Tim!






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Great!
Great!! Did everything they could to make it a pleasurable car buying experience! Great job to the team at Boucher BGMC






Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
I love my car so much!
I love my car so much! The process was so easy and only took a day to bring my car home!






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Great experience from beginning to end!
Great experience from beginning to end!! Extremely knowledgeable great customer service actually the best customer service I've ever experienced would definitely buy another car from them and recommend them to friends and family.

Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Best buying experience yet!
I bought my 2022 Wagoneer this week and could not have been happier with the entire experience. Joe, Brian, Chris, Krissy, and the finance team we’re all phenomenal. I have a lot of vehicle purchases under my belt and this team has without a doubt been the best. They have earned our business for years to come. Thanks to everyone on the team for making us feel like more than just a sale.
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GMC Sierra 1500 prices by year
Model year | Average price | Deals |
---|---|---|
2026 GMC Sierra 1500 | $67,173 | |
2025 GMC Sierra 1500 | $53,166 | 2 Good deals |
2024 GMC Sierra 1500 | $59,861 | 15 Good deals |
2023 GMC Sierra 1500 | $49,892 | 37 Good deals |
2022 GMC Sierra 1500 | $45,430 | 33 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 $35,952, with pricing starting at $16,748.
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.
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.
Research the 2020 GMC Sierra 1500
Compare the 2020 GMC Sierra 1500
2020 GMC Sierra 1500 Trucks by city
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2020 GMC Sierra 1500 Trucks in Potter Lake, WI
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2020 GMC Sierra 1500 Trucks in Waukesha, WI
1 Great Deal out of 20 listings starting at $27,604
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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.