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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 AT4 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.






Used
2020 GMC Sierra 1500 AT4
Vehicle information
Features
Reviews
My wife and I weren’t anticipating on coming to this
My wife and I weren’t anticipating on coming to this dealer to look for a car but plans changed last minute and we were glad they did. Mark West assisted us in picking the perfect car that fit all our needs and checked our boxes. We spent several hours there going through different cars and he pulled paperwork and worked on prices for some of the cars we appreciated the commitment and help he offered.
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
Great knowledgeable technicians, customer service,
Great knowledgeable technicians, customer service, efficient and customer oriented. Ted is the best. He always remembers me and my car. Ted is very knowledgeable and willing to help.
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
Michele Green (very good and helpful )
Michele Green Michele helped me all the way through from beginning to end getting my Truck fix after a Deer ran right into it. It was a Blessing to work with him. Michele even went with me to the body shop to look at my truck and I showed Michele a few things that was missed and he brought it up to them and they are going to fix it. Im so grateful for all the help Michele gave me
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.
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GMC Sierra 1500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 1500 AT4 | $4,280 | 5 Great deals |
2024 GMC Sierra 1500 AT4 | $47,600 | 258 Good deals |
2023 GMC Sierra 1500 AT4 | $41,994 | 193 Good deals |
2022 GMC Sierra 1500 AT4 | $32,950 | 19 Great deals |
2021 GMC Sierra 1500 AT4 | $28,000 | 43 Great deals |
2019 GMC Sierra 1500 AT4 | $23,000 | 7 Great deals |
About the 2020 GMC Sierra 1500 AT4
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 AT4 cost?
The 2020 GMC Sierra 1500 AT4 price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 1500 AT4 is $40,460, with pricing starting at $18,900.
What is the MPG of the 2020 GMC Sierra 1500 AT4?
The 2020 GMC Sierra 1500 AT4 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 AT4?
The 2020 GMC Sierra 1500 AT4 compares to and/or competes against the following vehicles:
Is the 2020 GMC Sierra 1500 AT4 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 AT4 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
*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.
GMC Sierra 1500 trims
-
GMC Sierra 1500 2020 SLT
32 Great Deals out of 467 listings starting at $26,811
-
GMC Sierra 1500 2020 Denali
15 Great Deals out of 261 listings starting at $28,749
-
GMC Sierra 1500 2020 Elevation
21 Great Deals out of 172 listings starting at $19,995
-
GMC Sierra 1500 2020 SLE
29 Great Deals out of 102 listings starting at $22,910
-
GMC Sierra 1500 2020 Base
16 Great Deals out of 59 listings starting at $14,990
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