Save your search and get notified when new inventory arrives.
Contact seller
Customize your budget
*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.
About your privacy: Cars.com is asking for your ZIP and credit rating because it helps us to make an educated guess at your sales tax and loan interest. These two factors can greatly change your monthly payment.
Used
2020 GMC Sierra 1500 trucks
for sale
near
Waukegan, IL
- 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 SLE
Vehicle information
Features
Reviews
Nice surprise!
Everyone was nice, friendly and did the oil change in a short period of time. I am happy to trust that the work needed for my vehicle was done with the utmost professionalism. Especially pleased with surprise at the end. Thanks for another good experience. Would recommend this dealership. I will be moving and am disappointed that I will be too far away to continue servicing at this dealership.
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 Denali
Vehicle information
Features
Reviews
Edgar Rueda was very helpful, we purchased the 2025
Edgar Rueda was very helpful, we purchased the 2025 Nissan Rogue with him. Excellent salesman.
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.






Vehicle information
Features
Reviews
Friendly customer service, helpful, informative; service
Friendly customer service, helpful, informative; service was timely. Tended to needed oil change with additional recommendations.; to be considered. 25 words request needs to be reduced
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
Andrew Doyle at this dealership was amazing to work with.
Andrew Doyle at this dealership was amazing to work with. He was soft spoken, detailed yet concise. He was influential in making a deposit for a purchase. I had to pull out later for other reasons. But I give high regards to Andrew’s work.
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 AT4
Vehicle information
Features
Reviews
Go see Bill at Bull Valley! You won’t regret it
Go see Bill. He is great! His consultative approach is refreshing in that biz. He knows about the cars instead of just working the deal like most others. The Managers were prepared and in time. No crazy wait times I was in and out in less than 1.5hrs! I would highly recommend this dealership and Bill specifically.
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 Denali
Vehicle information
Features
Reviews
Fabulous Exerience
Communicated with John Leno from the Schaumburg facility online. John understood my needs and responded quickly with Jeeps to review - after a bit of humming and hawing on my part, I changed my mind to trucks. I found a truck at another facility, John had it tranferred and within 2 days my soon to be truck arrived - and it is a beauty. John was training Matt and they both demonstrated immense knowledge throughout the interaction and I appreciated the ease of communication (not pushy). I cannot comment on the financing portion of the transaction, but closing went just as smoothly with Hubert and his supervisor. WHile impressed with my transaction I was also impressed with the amount of time that was placed on the training of new employees, or employees transferring. While yes my truck need a repair on the fog lights, it is covered under their warranty, I am highly impressed with my experience. From walking in the front door, to having John take my picture of me and my truck with a giant yellow ribbon... every individual at Carmax truly made the buying and trading experience a wonderful experience. Team Schaumburg, keep up the great work, each of you understand the true meaning of Customer Service, and that is important to some customers like me who still cherish old school values.






Used
2020 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
buena atención Joel Hernández muy amable y calidad en
buena atención Joel Hernández muy amable y calidad en servicio y rapidez en su trabajo






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.






Vehicle information
Features
Reviews
Great experience.
Great experience. Alex was a charm to work with for the truck I been wanting.






Used
2020 GMC Sierra 1500 Base
Vehicle information
Features
Reviews
Brought my my car in for normal service and Mark Took
Brought my my car in for normal service and Mark Took care of me. He was great. He pulled up my history on my car and made recommendations for what I needed and explained everything they would do. Also gave me approximate cost of service which was Very close to his quote. Work was done very quickly. Just a great experience. I will be back for my next service when needed. Also everybody that works there were very friendly .






Vehicle information
Features
Reviews
Best dealer ever.
Best dealer ever. Tatiana did a great job..She is very smart respectful and she has a lot of knowledge. My next car l m going to buy with them also and with Tatiana of course. If you are looking for a good price and a solid car go there and ask about Tatiana. Mike volvo v v90 cross country






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Easy buying experience.
Easy buying experience. They were very professional and the whole purchasing process was with one person.






Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
I purchase a 2019 Qx60 my experience was very very good
I purchase a 2019 Qx60 my experience was very very good sale person Thomas pates did a wonderful job to get me in this car everyone was helpful I will purchase another vehicle from there I am from Milwaukee thanks carwise






Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features
Reviews
I just purchased a 2023 Nissan Rouge SV from Rony
I just purchased a 2023 Nissan Rouge SV from Rony Durante. He was amazing! He made the process so easy and was such a pleasure to work with. Usually shopping for a car is so stressful but Rony made it easy and made it no pressure. Thank you Rony for the wonderful experience! We will be back again and recommend our friends and family!






Used
2020 GMC Sierra 1500 Denali
Vehicle information
Features
Reviews
Buying a car is stressful overall but Mr.
Buying a car is stressful overall but Mr. Lee McGee made it an easy and fun experience this time around for me. He was very helpful, going above and beyond, trying to do what he can to make things easier for me. He has a lot of knowledge about vehicles and how to go about saving money! If you’re looking to buy a car at Boucher, Lee is your guy!






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
Zeigler Honda again came through for me.
Zeigler Honda again came through for me. After securing a tow truck and being brought in with it, they scanned my car for electrical problems and battery needs. I needed a new battery and waited while that was done. Glad I could wait.! Attendants came by with water, popcorn, and updates!






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 Denali
Vehicle information
Features
Reviews
Very prompt response.
Very prompt response. Gave me all the details I needed. Follow-up has been very good

Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
The Advisor Tony and mechanic Technician Klaus are the
The Advisor Tony and mechanic Technician Klaus are the best. I give both of them 10 Stars for such great service. These two both strive to achieve the performance level of Excellence in their jobs everyday. Thank you for such great work
There are additional matching cars outside your search area.
Partial matches are generated by applying your search criteria to a larger search area. Our goal is to help you discover additional cars that match your search preferences.
As a benefit to some of our dealer customers, we display their listings first.






Used
2020 GMC Sierra 1500 Denali
Vehicle information
Features






Used
2020 GMC Sierra 1500 SLE
Vehicle information
Features






Used
2020 GMC Sierra 1500 Denali
Vehicle information
Features






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2020 GMC Sierra 1500 SLE
Vehicle information
Features






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features






Used
2020 GMC Sierra 1500 Denali
Vehicle information
Features






Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features






Used
2020 GMC Sierra 1500 Elevation
Vehicle information
Features






Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
-
Prev - 1
-
Next
GMC Sierra 1500 prices by year
Model year | Average price | Deals |
---|---|---|
2026 GMC Sierra 1500 | $62,324 | |
2025 GMC Sierra 1500 | $54,417 | 4 Good deals |
2024 GMC Sierra 1500 | $52,648 | 12 Good deals |
2023 GMC Sierra 1500 | $49,212 | 19 Good deals |
2022 GMC Sierra 1500 | $43,540 | 18 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 $36,111, with pricing starting at $15,299.
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
-
2020 GMC Sierra 1500 Trucks in Park City, IL
2 Great Deals out of 21 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Gurnee, IL
3 Great Deals out of 21 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in North Chicago, IL
2 Great Deals out of 21 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Green Oaks, IL
2 Great Deals out of 23 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Wadsworth, IL
3 Great Deals out of 20 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Gages Lake, IL
3 Great Deals out of 23 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Grandwood Park, IL
3 Great Deals out of 22 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Third Lake, IL
3 Great Deals out of 22 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Libertyville, IL
2 Great Deals out of 22 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Lindenhurst, IL
3 Great Deals out of 22 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Grayslake, IL
3 Great Deals out of 23 listings starting at $24,975
-
2020 GMC Sierra 1500 Trucks in Mettawa, IL
2 Great Deals out of 20 listings starting at $24,975
- ${price_badge()}
- ${ami_badge()}
- ${battery_badge()}${ev_report_link()}
- ${hot_car_badge()}
- ${award_badge()}
- ${cpo_badge()}
${price_badge_description}
${ami_badge_description}
The EV Battery Rating is based on this vehicle's current expected range relative to the vehicles expected range when new. ${battery_badge_text}
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.