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Used
2020 GMC Sierra 1500 SLT trucks
for sale
near me
- 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 SLT
Vehicle information
Features
Reviews
I'm happy with my Hyundai Tucson Hybrid SEL that I
I'm happy with my Hyundai Tucson Hybrid SEL that I purchased in the fall of 2022 at Phil Long Hyundai at the Motor City Way location in Colorado Springs. I'm also glad that I purchased the service package. My Sales person, Finance specialist, Service Team and Management are people I know I can count on to have my best interest at heart. Thanks for your hard work!
Any reviews on this vehicle is not correct.
Any reviews on this vehicle is not correct. We are first owners and it’s been an excellent truck. We hate to see it go !
Used
2020 GMC Sierra 1500 SLT
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Reviews
I took my truck to Town East Ford and had a great
I took my truck to Town East Ford and had a great experience. Dustin Bingham did an awesome job, getting me in and out and taking care of my truck.
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 SLT
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Reviews
Loved working with Debbie!
Loved working with Debbie! She was great and made sure I knew everything i needed to about the car and didn't let me worry about a thing!
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.
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Ali Purdy was amazing took charge finding new TAV4
Ali Purdy was amazing took charge finding my daughter a car asap for her 16th birthday. Process was easy and fast definitely call her and use her again.
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 SLT
Vehicle information
Features
Reviews
Molly truly cares that I have a good experience
Molly in service is the Best....Molly always has a smile on her face and ready to help all the time. I always tell my friends to go Starling Buick and ask for Molly...
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 SLT
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I’ve been getting my cars serviced at Toyota west for
I’ve been getting my cars serviced at Toyota west for years! I’ve never had high pressure sales or thought the service advisor was pushing anything! I think I worked with Aaron and he was very pleasant and knowledgeable! They are also pretty decently priced compared to other dealers in the area!
Used
2020 GMC Sierra 1500 SLT
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Reviews
I usually hate buying cars but the experience I had with
I usually hate buying cars but the experience I had with my salesman, Kris Portnoy, at Suntrup Kia was great. No high pressure and great to work with. He explained everything about my new vehicle and Kris really knows his stuff. I would highly recommend him if you are looking for a vehicle!
Used
2020 GMC Sierra 1500 SLT
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Reviews
Hendrick toyota nos aydo con el servicio.
Hendrick toyota nos aydo con el servicio. Jose Morales con el español fue muy amable.
Used
2020 GMC Sierra 1500 SLT
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Reviews
Victor Riley was so professional friendly.
Victor Riley was so professional friendly. Knew everything about the vehicle I bought walk me through everything. Got my phone hooked up to the vehicle and when it came for financing the team was just great. Thank you to team advantage
Used
2020 GMC Sierra 1500 SLT
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Reviews
Nate at Bristol auto mall was the best.
Nate at Bristol auto mall was the best. He helped me and my husband get into a nice and safe car. Every other dealer we bought from was totally a junker and piece of crap. He and the people there took care of me and I can’t thank him enough
Used
2020 GMC Sierra 1500 SLT
Vehicle information
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Reviews
a day ago New Awesome experience all around my
a day ago New Awesome experience all around my salesperson, Brian Muñoz was amazing from first contact all the way to me driving off the lot. He had sent me videos of the car I was interested in, he walked me through the process of applying on the website to get pre approve, followed through with any concerns or questions I may have had, and he informed me of all the documents I needed to bring with me. I did not feel stressed during the process and it was a quick .
Used
2020 GMC Sierra 1500 SLT
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Amir was fantastic salesman.
Amir was fantastic salesman. Very knowledgeable and easy to work with. Made the entire process easy breezy. I would have no reservations recommending this dealership and salesforce to family and friends.
Certified
2020 GMC Sierra 1500 SLT
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Reviews
Sales team was top notch and finance team did a great job
Sales team was top notch and finance team did a great job finishing the sale.
Used
2020 GMC Sierra 1500 SLT
Vehicle information
Features
Reviews
Jay was great.
Jay was great. Polite, non pushy, supportive. Really knew his cars. The faculty is like none we have seen too. Excellent experience. The only part that was uncomfortable was at the end. They had an “up seller” for the extended warranty come in and “nicely” try to talk you into it. It wasn’t so much that but the surprise and lack of time to process the conversation. Overall-I’d recommend them and would buy from them again.
Used
2020 GMC Sierra 1500 SLT
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Reviews
I just wanted to say Tim Hoffman in service exceeded my
I just wanted to say Tim Hoffman in service exceeded my expectations. I bought a 2016 CT6 from a dealership in Crystal Lake. I put 300 miles on the car and noticed something was not right with Transmission good thing I had the extended warranty. Tim coordinated everything it was a big job and he coordinated everything with warranty company and kept me updated on status. Thanks Tim one of the best dealership experiences I have had with a dealer. Al B
Used
2020 GMC Sierra 1500 SLT
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The staff was courteous and provided timely updates.
The staff was courteous and provided timely updates. They also communicated all issues found during the multipoint inspection. Giving options and ability to defer repairs based on criticality.
Used
2020 GMC Sierra 1500 SLT
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Reviews
Very attentive, and easy going.
Very attentive, and easy going. They had me in and out for my oil change. Loved the lounge that they had with the big screens. They also had water and coffee that was readily available.
Used
2020 GMC Sierra 1500 SLT
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See Mr. Brown
For a new or used car purchase, I would invite customers to ask for Mr. James Brown in sales. He is both knowledgeable about the product, clear about the transaction, mature and able to help you avoid the usual *noise* you find at most other dealerships. We were able to make a good deal on our new car with Mr. Brown’s expert assistance.
Used
2020 GMC Sierra 1500 SLT
Vehicle information
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Reviews
I was helped immediately as soon as i got there and was
I was helped immediately as soon as i got there and was guided the whole way. I was helped by Rory who got me get exactly what I wanted and helped me stay in my budget. I would recommend him for any purchase and he answered all my questions, Kept it real with me. Thank you Autonation Toyota for helping me get my first big purchase.
Used
2020 GMC Sierra 1500 SLT
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I’ve purchased multiple Porsches from Hennessy Porsche
I’ve purchased multiple Porsches from Hennessy Porsche North Atlanta—over $1,000,000 in vehicles—and I keep coming back for one reason: Tito and Michael Carvajal. Tito is my number-one salesperson; he always understands what I’m looking for and finds the exact cars I want. Michael is the best finance manager this store could have—professional, responsive, and genuinely attentive to my needs. Both Tito and Michael treat me with respect, make the buying process effortless, and deliver a true five-star experience every time. If you want outstanding service, contact Tito and Michael Carvajal at Hennessy Porsche North Atlanta. I wouldn’t shop anywhere else without them. Diversity and professionalism matter, and I’m grateful Hennessy has these two exceptional team members
GMC Sierra 1500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 1500 SLT | 31 Great deals | |
| 2025 GMC Sierra 1500 SLT | $45,238 | 510 Great deals |
| 2024 GMC Sierra 1500 SLT | $45,261 | 183 Great deals |
| 2023 GMC Sierra 1500 SLT | $44,265 | 60 Great deals |
| 2022 GMC Sierra 1500 SLT | $40,541 | 53 Great deals |
| 2021 GMC Sierra 1500 SLT | $35,676 | 88 Great deals |
| 2019 GMC Sierra 1500 SLT | $32,230 | 24 Great deals |
| 2018 GMC Sierra 1500 SLT | $27,466 | 67 Great deals |
| 2017 GMC Sierra 1500 SLT | $25,014 | 37 Great deals |
About the 2020 GMC Sierra 1500 SLT
SLT shown.
- Seating
- 5
- Door count
- 4
- Drivetrain
- Rear Wheel Drive
- Combined MPG
- 19
- Transmission
- 10-Speed A/T
- Engine
- 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)
How much does the 2020 GMC Sierra 1500 SLT cost?
The 2020 GMC Sierra 1500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 1500 SLT is $33,587, with pricing starting at $19,950.
What is the MPG of the 2020 GMC Sierra 1500 SLT?
The 2020 GMC Sierra 1500 SLT offers up to 17 MPG in city driving and 23 MPG on the highway for a combined rating of 19 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 options, driving conditions, driving habits, vehicle maintenance, and other factors.
What are some similar vehicles and competitors of the 2020 GMC Sierra 1500 SLT?
The 2020 GMC Sierra 1500 SLT compares to and/or competes against the following vehicles:
Is the 2020 GMC Sierra 1500 SLT 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.
91% of drivers recommend this car
- Comfort
- 4.9
- Interior
- 4.8
- Performance
- 4.8
- Value
- 4.6
- Exterior
- 4.9
- Reliability
- 4.7
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.
2020 GMC Sierra 1500 SLT by popular city
-
2020 GMC Sierra 1500 SLT in Dallas, TX
2 Great Deals out of 24 listings starting at $19,950
GMC Sierra 1500 trims
-
GMC Sierra 1500 2020 AT4
48 Great Deals out of 317 listings starting at $22,900
-
GMC Sierra 1500 2020 Denali
50 Great Deals out of 314 listings starting at $23,500
-
GMC Sierra 1500 2020 Elevation
31 Great Deals out of 181 listings starting at $18,850
-
GMC Sierra 1500 2020 SLE
23 Great Deals out of 72 listings starting at $17,481
-
GMC Sierra 1500 2020 Base
9 Great Deals out of 40 listings starting at $14,995
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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.