2020 GMC Sierra 1500 SLT
Specifications, live market data, colors, and factory features.
469 for sale right now
$16,000 – $49,899
Specifications
Performance
- Engine
- 5.3L 8-Cylinder L84 - DI, DFM, ALUM, GEN 5, VAR 2
- Horsepower
- 355 hp
- Torque
- 383 lb-ft
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4WD
Fuel & Efficiency
- Fuel
- Gasoline
- MPG City
- 16 mpg
- MPG Highway
- 22 mpg
- MPG Combined
- 19 mpg
- Fuel Tank
- 24 gal
Dimensions
- Length
- 231.7″
- Width
- 81.2″
- Height
- 75.5″
- Wheelbase
- 147.4″
- Curb Weight
- 5,040 lbs
Body & Practicality
- Body Style
- Truck
- Doors
- 4
- Seating
- 6
- Base MSRP
- $50,200
Colors
Factory colors on 2020 GMC Sierra 1500 SLTs for sale now.
Exterior
- Summit White(white)44
- Onyx Black(black)42
- Satin Steel Metallic(gray)27
- Dark Sky Metallic(gray)19
- Quicksilver Metallic(silver)19
- White13
- Red Quartz Tintcoat(red)12
- White Frost Tricoat(white)9
- Pacific Blue Metallic(blue)9
- Gray9
Interior
- Jet Black(black)136
- Dark Walnut/Slate(gray)41
- Black21
- Dark Walnut(brown)18
- Gray8
- Dark Walnut/Dark Ash Gray(brown)2
- Jet Black Perforated Leather Appointed Front Seat(black)1
- Dark Walnut/Slate, Perforated leather-appointed fr(brown)1
- Tan(brown)1
Live Market Data
Computed from active 2020 GMC Sierra 1500 SLT listings nationwide, updated continuously.
Price Distribution
Price vs. Mileage
Latest SLT Listings
The newest 2020 GMC Sierra 1500 SLTs on the market.

Used 2020 GMC Sierra 1500
$38,723
Est. $565/mo*
Mundo Auto Sales Inc.

Used 2020 GMC Sierra 1500
$42,528
Est. $619/mo*
Lindsay Chevrolet of Front Royal

Used 2020 GMC Sierra 1500
$36,399
Est. $532/mo*
Dobbs Brothers Chevrolet

Used 2020 GMC Sierra 1500
$32,619
Est. $478/mo*
Patriot Chrysler Dodge Jeep RAM of Pryor

Used 2020 GMC Sierra 1500
$35,444
Est. $518/mo*
Wayne Akers Ford

Used 2020 GMC Sierra 1500
$40,529
Est. $591/mo*
Dealers Choice Porterville

Used 2020 GMC Sierra 1500
$32,580
Est. $478/mo*
Chapman Chevrolet GMC

Used 2020 GMC Sierra 1500
$37,584
Est. $549/mo*
Chapman Honda Tucson
What's Yours
Worth?
The median 2020 GMC Sierra 1500 SLT lists for $33,190 today.
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GMC Sierra 1500 SLT
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Factory Features
Standard equipment from the window sticker, reviewed for accuracy.
Comfort & Convenience
- Keyless Open and Start
- Remote vehicle start
- 120-volt power outlets (instrument panel and cargo bed)
- 2 front and 2 rear USB ports
- Color Driver Information Center
Entertainment
- Premium GMC Infotainment System with 8" diagonal HD color touchscreen
- Voice recognition
- Bluetooth audio streaming
- Apple CarPlay capability
- Android Auto capability
- In-vehicle apps and personalization capable
- SiriusXM radio capable (subscription sold separately)
- 4G LTE Wi-Fi hotspot capable (OnStar; service plan/data may be required)
Exterior
- GMC MultiPro six-function tailgate (standard on SLT)
- 18" 6-spoke machined aluminum wheels with Dark Gray Metallic accents
- LED reflector high-intensity headlamps with signature daytime running lamps
- LED signature taillamps
- LED fog lamps
- LED cargo area lighting
- Chrome accents on grille, front/rear bumpers, fog lamps, side-window surrounds, mirror caps, and door handles
- Power-folding, heated outside mirrors with auto-dimming
- CornerStep rear bumper with large corner steps
- 12 fixed cargo tie-downs
- Rear wheelhouse liners
- Rear-window defogger
- Front recovery hooks (as listed standard on factory SLT window stickers; typically 4WD configuration)
Interior
- Perforated leather-appointed front seating (Dark Walnut/Slate or Jet Black perforated — standard SLT appointments)
- Heated front seats
- 10-way power front seat adjusters (front outboard)
- Driver seat and outside mirror memory
- Rear 60/40 folding bench seat with storage package / rear seatback and under-seat storage
- Dual-zone automatic climate control
- Rear HVAC vents (Double Cab and Crew Cab)
- Heated, leather-wrapped steering wheel
- Carpeted floor mats
- Cypress wood-tone interior accents; Aegis patterned aluminum interior finishes (SLT standard finishes)
Mechanical & Performance
- 5.3L EcoTec3 V8 with Dynamic Fuel Management (355 hp / 383 lb-ft) — standard SLT powertrain
- 8-speed automatic transmission on 2WD models; 10-speed automatic on 4WD models with the standard 5.3L V8
- Auto-locking rear differential
- StabiliTrak electronic stability control with Trailer Sway Control and Hill Start Assist
- Traction control
- Duralife brake rotors
- Brake pad wear monitoring
- 170-amp alternator (gasoline)
- All-season tires
- Trailering Package (trailer hitch, 7-pin and 4-pin connectors)
- Integrated trailer brake controller
- ProGrade Trailering System with in-vehicle Trailering App
- 2-speed Autotrac electronic transfer case with terrain mode (4WD models)
Safety & Security
- HD Rear Vision Camera
- Teen Driver mode
- Tire Pressure Monitoring System with Tire Fill Alert
- Rear Seat Reminder
- StabiliTrak with Traction Control and Hill Start Assist
- OnStar services capable
Warranty
- 3-year/36,000-mile bumper-to-bumper limited warranty
- 5-year/60,000-mile powertrain limited warranty (gasoline; diesel SLT: 5-year/100,000-mile powertrain when equipped with 3.0L Duramax)
- Roadside Assistance and Courtesy Transportation for the duration of the Powertrain Limited Warranty
- First maintenance visit
- 6-year/100,000-mile rust-through corrosion coverage