Used 2020 GMC Sierra 3500 SLT trucks for sale near you
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Vehicle Information
- Ext. color
- Brownstone Metallic
- Int. color
- Dark Walnut/Slate
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- Automatic
- Engine
- Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
- Stock #
- P6109
- VIN
- 1GT49UEY2LF136855
Features
- Convenience
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Remote Start
- Entertainment
- Android Auto®
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- USB Port
- WiFi Hotspot
- Exterior
- Alloy Wheels
- Tow Hitch
- Tow Hooks
- Safety
- Automatic Emergency Braking
- Backup Camera
- Brake Assist
- LED Headlights
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Al Piemonte Buick GMCReviews
Al Piemonte Buick GMC review
We've worked with Tony before & he is very knowledgeable & knows just what we like.
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Vehicle Information
- Ext. color
- Brownstone Metallic
- Int. color
- Dark Walnut/Slate
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- Automatic
- Engine
- Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
- Stock #
- P6109
- VIN
- 1GT49UEY2LF136855
Features
- Convenience
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Remote Start
- Entertainment
- Android Auto®
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- USB Port
- WiFi Hotspot
- Exterior
- Alloy Wheels
- Tow Hitch
- Tow Hooks
- Safety
- Automatic Emergency Braking
- Backup Camera
- Brake Assist
- LED Headlights
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Al Piemonte Buick GMCReviews
Al Piemonte Buick GMC review
We've worked with Tony before & he is very knowledgeable & knows just what we like.
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$54,200
Est. $1,019/mo Dishman Dodge RAM Chrysler Jeep
Check Availability Vehicle Information
- Ext. color
- White Frost Tri-Coat
- Int. color
- Dark Walnut
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- 10-Speed Automatic
- Engine
- 6.6L V8 32V DDI OHV Turbo Diesel
- Stock #
- 36474
- VIN
- 1GT49UEY7LF122207
Features
- Convenience
- Heated Steering Wheel
- Keyless Start
- Remote Start
- Entertainment
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- Satellite Radio
- USB Port
- Exterior
- Tow Hitch
- Safety
- Backup Camera
- Brake Assist
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Dishman Dodge RAM Chrysler JeepReviews
Dishman Dodge RAM Chrysler Jeep review
Can't say enough good things about my experience buying my truck from them. It was a no pressure experience. Very nice people from the salesman to the finance guy. Both went the extra mile to make sure I felt good about my purchase. Very upfront with no surprises.
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Vehicle Information
- Ext. color
- Summit White
- Int. color
- Jet Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- Automatic
- Engine
- Duramax 6.6L Turbo-Diesel V8 B20-Diesel Compatible Engine
- Stock #
- 302890
- VIN
- 1GT49UEY2LF302890
Features
- Convenience
- Cooled Seats
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Navigation System
- Remote Start
- Entertainment
- Android Auto®
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- USB Port
- WiFi Hotspot
- Exterior
- Sunroof/Moonroof
- Tow Hitch
- Tow Hooks
- Safety
- Automatic Emergency Braking
- Backup Camera
- Blind Spot Monitor
- Brake Assist
- LED Headlights
- Lane Departure Warning
- Rear Cross Traffic Alert
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Trust AutoReviews
Trust Auto review
We sold our SUV to Trust Auto, and dealt with Nemat Yuldashev. Once we agreed on the price, the rest was easy, especially since we don't live in MD. He was very responsive and professional, and the deal was completed in a timely manner. We are very happy with the process and would recommend using this company.
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Vehicle Information
- Ext. color
- Quicksilver Metallic
- Int. color
- Jet Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- Automatic
- Engine
- Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
- Stock #
- SI259M
- VIN
- 1GT49UEY6LF227594
Features
- Convenience
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Remote Start
- Entertainment
- Android Auto®
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- USB Port
- WiFi Hotspot
- Exterior
- Tow Hitch
- Tow Hooks
- Safety
- Automatic Emergency Braking
- Backup Camera
- Brake Assist
- LED Headlights
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Shift Innovations Car CoReviews
Shift Innovations Car Co review
WOW! A great, clean, locally owned used car dealer! What a wonderful experience! Highly recommend😊 Questions were answered, easy process, family oriented, and strives to go above and beyond any obligations. I couldn’t have asked for better service! Thank you❤️
2020 GMC Sierra 3500 review
Nicest truck I have ever owned preforms great with my RV Truck is comfortable and still works great when you need it to preform. Ride is nice and very roomy for all that want to travel with me
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Vehicle Information
- Ext. color
- Cardinal Red
- Int. color
- Jet Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- Automatic
- Engine
- Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
- Stock #
- 172199
- VIN
- 1GT49UEY9LF172199
Features
- Convenience
- Cooled Seats
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Navigation System
- Remote Start
- Entertainment
- Android Auto®
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- USB Port
- WiFi Hotspot
- Exterior
- Alloy Wheels
- Sunroof/Moonroof
- Tow Hitch
- Tow Hooks
- Safety
- Automatic Emergency Braking
- Backup Camera
- Blind Spot Monitor
- Brake Assist
- LED Headlights
- Lane Departure Warning
- Rear Cross Traffic Alert
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Car Central -
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Vehicle Information
- Ext. color
- Red
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- 6-Speed Automatic
- Engine
- 6.6L V8 32V DDI OHV Turbo Diesel
- Stock #
- 6912
- VIN
- 1GT49UEY8LF234451
Features
- Convenience
- Heated Steering Wheel
- Keyless Start
- Remote Start
- Entertainment
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- Satellite Radio
- USB Port
- Exterior
- Tow Hitch
- Safety
- Backup Camera
- Brake Assist
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Snyder Motors IncReviews
Snyder Motors Inc review
Got the truck I wanted. Hassle free and they helped me as much as they could. Would recommend
2020 GMC Sierra 3500 review
The Texas Edition combined with the X31 package and premium SLT makes a very nice combination. The Sierra 3500HD gives you a luxury interior and ride with all the capabilities of a great pulling truck. The Duramax is quiet yet powerful. It is no doubt the best of trucks for 2020.
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Vehicle Information
- Ext. color
- White
- Int. color
- Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- 10-Speed Automatic
- Engine
- 6.6L V8 32V DDI OHV Turbo Diesel
- Stock #
- U2299
- VIN
- 1GT49UEY7LF157233
Features
- Convenience
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Remote Start
- Entertainment
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- Satellite Radio
- USB Port
- Exterior
- Alloy Wheels
- Tow Hitch
- Safety
- Backup Camera
- Brake Assist
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Southtowne MitsubishiReviews
Southtowne Mitsubishi review
Very pleasant and helpful returning my calls and getting back to me. The Manager even called when the assigned salesman was out of town.
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Vehicle Information
- Ext. color
- Silver
- Int. color
- Jet Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- Automatic
- Engine
- Duramax 6.6L V-8 diesel direct injection, intercooled turbo, die
- Stock #
- G26-759A
- VIN
- 1GT49UEY6LF161211
Features
- Convenience
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Remote Start
- Entertainment
- Android Auto®
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- USB Port
- WiFi Hotspot
- Exterior
- Alloy Wheels
- Tow Hitch
- Tow Hooks
- Safety
- Automatic Emergency Braking
- Backup Camera
- Brake Assist
- LED Headlights
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
West Metro Buick GMCReviews
West Metro Buick GMC review
Best dealership around! The kindest staff, patient and willing to help you find exactly what you are looking for. Corey was super helpful and made the process and breeze. We have purchased 4 vehicles from West Metro and I know we will be back when we are ready for another.
2020 GMC Sierra 3500 review
Great vehicle for pulling my fifth wheel RV which weighs around 20,000 pounds. This dually truck pulls the RV very nicely without any significant strain on the engine or the transmission. However, like all of today's diesel engines there are 4 different system of emissions on this truck. Each one of these emission systems has sensors associated with them. If one of these sensors goes bad the truck will not perform optimally and sometimes it will go into the limp mode. Unfortunately this is not unique to GMC trucks. All manufacturers are battling this system. Also, I have had to take the truck to the dealer for computer upgrades in order to improve performance. I wish these upgrades could be performed on line (through wifi or with my own phone service). It sure would make things a lot simpler and improve the through put of the dealers who are already strained because of the limited number of available diesel mechanics.
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$54,643
Est. $1,027/mo Larry H. Miller Ford Draper
Check Availability Vehicle Information
- Ext. color
- Summit White
- Int. color
- Jet Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- Automatic
- Engine
- 6.6L V8 32V DDI OHV Turbo Diesel
- Stock #
- SFLTLF253862
- VIN
- 1GT49UEY3LF253862
Features
- Convenience
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Remote Start
- Entertainment
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- Satellite Radio
- USB Port
- Exterior
- Alloy Wheels
- Tow Hitch
- Safety
- Backup Camera
- Brake Assist
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Larry H. Miller Ford DraperReviews
Larry H. Miller Ford Draper review
Scott Litton was very helpful, knowledgeable and efficient. This was the best truck buying experience we have had. Finance was a breeze. I would definitely recommend this dealership.
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Vehicle Information
- Ext. color
- Red Quartz Tintcoat
- Int. color
- Jet Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- Automatic
- Engine
- 6.6L V8 32V DDI OHV Turbo Diesel
- Stock #
- 25499
- VIN
- 1GT49UEY2LF146317
Features
- Convenience
- Heated Steering Wheel
- Keyless Start
- Remote Start
- Entertainment
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- Satellite Radio
- USB Port
- Exterior
- Tow Hitch
- Safety
- Backup Camera
- Brake Assist
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Eagle Buick GMC, Inc.Reviews
Eagle Buick GMC, Inc. review
Russ, John porter and Gordon. Are the BEST I’ve ever to work with. The whole staff is a pleasure to be around. Very professional!!!
2020 GMC Sierra 3500 review
Good power plenty of room the truck has all kind of new technology in it that helps with driving safety and with job performance Awesome
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$47,998
Est. $902/mo SHEPHERD'S CHEVROLET GMC OF WABASH
Check Availability Vehicle Information
- Ext. color
- Sky
- Int. color
- Jet Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- 10-Speed Automatic
- Engine
- 6.6L V8 32V DDI OHV Turbo Diesel
- Stock #
- W1944A
- VIN
- 1GT49UEY1LF172245
Features
- Convenience
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Remote Start
- Entertainment
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- Satellite Radio
- USB Port
- Exterior
- Alloy Wheels
- Tow Hitch
- Safety
- Automatic Emergency Braking
- Backup Camera
- Brake Assist
- Lane Departure Warning
- Rear Cross Traffic Alert
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
SHEPHERD'S CHEVROLET GMC OF WABASH -
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$57,620
Est. $1,083/mo Corwin Chrysler Dodge Jeep Ram Fiat of Springfield
Check Availability Vehicle Information
- Ext. color
- Carbon Black Metallic
- Int. color
- Jet Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- 10-Speed Automatic
- Engine
- 6.6L V8 32V DDI OHV Turbo Diesel
- Stock #
- 3292799
- VIN
- 1GT49UEY8LF292799
Features
- Convenience
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Remote Start
- Entertainment
- Apple CarPlay®
- Bluetooth®
- Premium Sound System
- Satellite Radio
- USB Port
- Exterior
- Alloy Wheels
- Sunroof/Moonroof
- Tow Hitch
- Safety
- Automatic Emergency Braking
- Backup Camera
- Brake Assist
- Lane Departure Warning
- Rear Cross Traffic Alert
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Corwin Chrysler Dodge Jeep Ram Fiat of SpringfieldReviews
Corwin Chrysler Dodge Jeep Ram Fiat of Springfield review
Jeff Allen was the best he made sure our car was repaired and we knew everything that was done. Also the whole staff was very friendly always there to show us the way Will always come to springfield on Kearny Street for our repairs thank you much
2020 GMC Sierra 3500 review
Comfort, ease of driving, style, convenient for work and we LOVE the tailgate! Great for towing our heavy fifth wheel and our dogs are riding in style!!
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Vehicle Information
- Ext. color
- Summit White
- Int. color
- Jet Black
- Drivetrain
- Four-wheel Drive
- Fuel type
- Diesel
- Transmission
- 10-speed automatic
- Engine
- Duramax 6.6L V-8 direct injection, intercooled turbo, diesel, en
- Stock #
- TLF302726
- VIN
- 1GT49UEY0LF302726
Features
- Convenience
- Cooled Seats
- Heated Seats
- Heated Steering Wheel
- Keyless Entry
- Keyless Start
- Navigation System
- Remote Start
- Entertainment
- Android Auto®
- Apple CarPlay®
- Bluetooth®
- USB Port
- WiFi Hotspot
- Exterior
- Alloy Wheels
- Sunroof/Moonroof
- Tow Hitch
- Tow Hooks
- Safety
- Automatic Emergency Braking
- Backup Camera
- Blind Spot Monitor
- Brake Assist
- LED Headlights
- Lane Departure Warning
- Rear Cross Traffic Alert
- Stability Control
- Seating
- Leather Seats
- Memory Seat
Dealer
Dave Smith Coeur d'AleneReviews
Dave Smith Coeur d'Alene review
I did not buy but over all customer service was excellent. Was approved pretty fast
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$78,404
New 2026 GMC Sierra 3500 SLT 
$77,799
New 2026 GMC Sierra 3500 SLT 
$76,399
New 2026 GMC Sierra 3500 SLT 
$75,904
New 2026 GMC Sierra 3500 SLT 
$80,541
New 2026 GMC Sierra 3500 SLT 
$83,370
New 2026 GMC Sierra 3500 SLT 
$80,553
New 2026 GMC Sierra 3500 SLT 
$80,034
New 2026 GMC Sierra 3500 SLT 
$76,999
New 2026 GMC Sierra 3500 SLT 
$69,909
New 2026 GMC Sierra 3500 SLT 
$74,841
New 2026 GMC Sierra 3500 SLT 
$77,299
New 2026 GMC Sierra 3500 SLT -
GMC Sierra 3500 prices by year
| Model year | Average price | Deals |
|---|---|---|
| 2026 GMC Sierra 3500 SLT |
|
|
| 2025 GMC Sierra 3500 SLT | $67,095 |
|
| 2024 GMC Sierra 3500 SLT | $59,630 |
|
About the 2020 GMC Sierra 3500 SLT
SLT shown.
- Seating
- 5
- Door count
- 4
- Drivetrain
- Rear Wheel Drive
- Combined MPG
- 0
- Transmission
- 6-Speed A/T
- Engine
- 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
How much does the 2020 GMC Sierra 3500 SLT cost?
The 2020 GMC Sierra 3500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 3500 SLT is $49,060, with pricing starting at $36,900.
What are some similar vehicles and competitors of the 2020 GMC Sierra 3500 SLT?
The 2020 GMC Sierra 3500 SLT compares to and/or competes against the following vehicles:
- RAM 3500
- GMC Sierra 2500
- GMC Sierra 1500 Hybrid
- Chevrolet Silverado 3500
- Chevrolet Silverado 2500
Is the 2020 GMC Sierra 3500 SLT reliable?
The 2020 GMC Sierra 3500 has an average reliability rating of 4.9 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 3500 owners.
100% of drivers recommend this car
- Comfort
- 4.9
- Interior
- 4.9
- Performance
- 4.9
- Value
- 4.7
- Exterior
- 5.0
- Reliability
- 4.9
SLT (4 styles)
| Style | |||
|---|---|---|---|
| 2WD Crew Cab 172" SLT | 4WD Crew Cab 172" SLT | 4WD Crew Cab 159" SLT | 2WD Crew Cab 159" SLT |
| Inventory price | |||
| Starting at $54,200 | Starting at $57,000 | Starting at $56,800 | Starting at $54,000 |
| Combined MPG | |||
| 0 | 0 | 0 | 0 |
| Engine | |||
| 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) | 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) |
2020 GMC Sierra 3500 trims
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2020 GMC Sierra 3500 Denali
17 Great Deals out of 95 listings starting at $38,350