2021 GMC Sierra 1500 SLT

Specifications, live market data, colors, and factory features.

772 for sale right now

$21,594 – $52,349

View Listings

Specifications

355

Horsepower

383

lb-ft Torque

MPG Combined

Seats

$51k

Base MSRP

Performance

Engine: 3.0L In-Line LM2
Horsepower: 355 hp
Torque: 383 lb-ft
Transmission: 10-Speed Automatic
Drivetrain: 4WD

Fuel & Efficiency

Fuel: Diesel
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: $50,800

Colors

Factory colors on 2021 GMC Sierra 1500 SLTs for sale now.

Exterior

Summit White(white)46
Satin Steel Metallic(gray)20
Onyx Black(black)17
Dark Sky Metallic(blue)15
Cayenne Red Tintcoat(red)12
White Frost Tricoat(white)11
Quicksilver Metallic(silver)10
Pacific Blue Metallic(blue)10
White Frost Tri-Coat(white)6
Ebony Twilight Metallic(black)5

Interior

Jet Black(black)116
Dark Walnut/Slate(gray)24
Dark Walnut(brown)19
Black9
Gray2

Live Market Data

Computed from active 2021 GMC Sierra 1500 SLT listings nationwide, updated continuously.

For sale now772

Median price$34,097

Average price$34,144

Price range$21,594 – $52,349

Median vs. MSRP−$16,703

Avg. days on market28

Avg. mileage86,238 mi

New / Used0 / 500

Price Distribution

Price vs. Mileage

Latest SLT Listings

The newest 2021 GMC Sierra 1500 SLTs on the market.

View all 772 →

Used 2021 GMC Sierra 1500

SLT

$30,895

95,016 mi

Est. $454/mo*

1 day at this dealer

SilverJet Black

DriveTime of Sanford

Sanford, FL

Used 2021 GMC Sierra 1500

SLT

$40,084

35,226 mi

Est. $585/mo*

1 day at this dealer

Dark Sky MetallicDark Walnut

Mercedes-Benz of Stockton

Stockton, CA

Used 2021 GMC Sierra 1500

SLT

$41,972

13,383 mi

Est. $611/mo*

1 day at this dealer

Dark Sky MetallicJet Black

Chuck Nash Chevrolet Buick GMC

San Marcos, TX

Used 2021 GMC Sierra 1500

SLT

$43,398

28,138 mi

Est. $632/mo*

2 days at this dealer

Summit WhiteJet Black

Mercedes-Benz of Draper

Draper, UT

Used 2021 GMC Sierra 1500

SLT

$37,849

64,113 mi

Est. $553/mo*

2 days at this dealer

BlueJet Black

Spitzer Chrysler Dodge Jeep RAM - Cleveland

Cleveland, OH

Used 2021 GMC Sierra 1500

SLT

$32,500

74,154 mi

Est. $476/mo*

2 days at this dealer

Summit WhiteJet Black

Classic Chevrolet Buick GMC

Cleburne, TX

Used 2021 GMC Sierra 1500

SLT

$33,009

121,775 mi

Est. $484/mo*

3 days at this dealer

BlackGray

Peltier KIA Longview

Longview, TX

Used 2021 GMC Sierra 1500

SLT

$40,000

32,598 mi

Est. $583/mo*

3 days at this dealer

Steel MetallicGray

Parks Chevrolet Kernersville

Kernersville, NC

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The median 2021 GMC Sierra 1500 SLT lists for $34,097 today.

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Factory Features

Standard equipment from the window sticker, reviewed for accuracy.

Comfort & Convenience

Keyless Open and Start
Remote vehicle starter system
Power door locks
Power front windows with driver and passenger express up/down
Power rear windows with express down
Steering wheel-mounted cruise control
120-volt instrument-panel power outlet
120-volt bed-mounted power outlet
Front auxiliary 12-volt power outlet
Rear auxiliary 12-volt power outlet
Dual charge-only USB ports
USB data ports (and SD card reader as equipped with the audio system)

Driver Assistance

HD Rear Vision Camera
Hitch Guidance
Hitch Guidance with Hitch View (image adjustment / pan / zoom / tilt)
In-vehicle Trailering App (checklist, maintenance reminders, security alerts, trailer mileage, Tow/Haul reminder, trailer electrical diagnostics)

Entertainment

Premium GMC Infotainment System with 8" diagonal multi-touch color display
AM/FM stereo with Bluetooth streaming audio
Wireless Apple CarPlay and wireless Android Auto capability
Wireless phone projection
Bluetooth phone connectivity
Advanced voice recognition
In-vehicle apps and personalized profiles for infotainment and vehicle settings
HD Radio
SiriusXM Radio / SiriusXM with 360L (trial subscription)
6-speaker audio system
Steering wheel audio controls
4G LTE Wi-Fi Hotspot capable

Exterior

GMC MultiPro Tailgate with six load/access functions
Tailgate with EZ Lift, power lock and release, and hitch-area light
Tailgate and bed-rail top protection caps
LED cargo-area lighting (bed) with in-cab switch and key-fob activation
Cab-mounted cargo-area lamps integrated with center high-mount stop lamp
LED reflector headlamps with LED turn signals and LED signature Daytime Running Lamps
LED signature taillamps with LED stop and reverse lights
LED fog lamps
Chrome door handles
Chrome mirror caps
Chrome window-surround moldings
Chrome front bumper (lower) and chrome rear bumper with CornerSteps
Grille (SLT chrome-accent exterior treatment)
Heated, power-adjustable, power-folding outside mirrors with driver-side auto-dimming, puddle lamps, side perimeter lighting, and memory
Deep-tinted glass
Rear wheelhouse liners
18" x 8.5" 6-spoke machined aluminum wheels with Dark Grey Metallic accents
265/65R18SL all-season blackwall tires
17" x 8" full-size steel spare wheel
265/70R17SL all-season blackwall spare tire
Keyed tire-carrier lock (same key as ignition/doors)

Interior

Perforated leather-appointed front outboard seating surfaces
Front 40/20/40 split-bench seat with covered armrest storage and under-seat storage
10-way power driver seat with power lumbar
10-way power front passenger seat with power lumbar
Heated driver and front outboard passenger seats
Driver memory for power driver seat and outside mirrors
Up-level rear 60/40 folding bench with seatback storage, center fold-out armrest with dual cupholders, and full-width under-seat storage (Crew Cab)
Leather-wrapped heated steering wheel
Manual tilt and telescoping steering column
Electrical steering-column lock
Dual-zone automatic climate control
Rear air vents
Electric rear-window defogger
Auto-dimming inside rearview mirror
Color-keyed carpeting with carpeted front and rear floor mats
6-gauge instrument cluster (speedometer, fuel, engine temperature, tachometer, voltage, oil pressure)
4.2" diagonal color Driver Information Center with driver personalization
Compass (instrument cluster)
Exterior temperature display (radio display)
Assist handles (front A-pillar; rear B-pillar)
GMC Connected Access capable

Mechanical & Performance

5.3L EcoTec3 V8 engine with Dynamic Fuel Management (355 hp / 383 lb-ft)
8-speed automatic transmission with overdrive and Tow/Haul mode (Cruise Grade Braking and Powertrain Grade Braking)
Automatic Stop/Start
Auto-locking rear differential
4-wheel antilock disc brakes with DURALIFE rotors
Electric power-assisted rack-and-pinion steering
Fully boxed frame with hydroformed front section
Heavy-duty 730 cold-cranking amp / 80 Amp-hr battery with rundown protection and retained accessory power
170-amp alternator
External engine oil cooler
Auxiliary external transmission oil cooler
Capless fuel fill
Single-outlet exhaust with aluminized stainless-steel muffler and tailpipe
Pickup bed with fixed cargo tie-downs (500 lbs per corner)
Trailering Package: trailer hitch, 7-pin and 4-pin connectors, and Hitch Guidance
ProGrade Trailering System: Hitch Guidance with Hitch View and in-vehicle Trailering App
Integrated trailer brake controller
Rear axle ratio 3.23
4WD models: four-wheel drive with single-speed electronic Autotrac transfer case (push-button control)
4WD models: frame-mounted front recovery hooks (Black)

Safety & Security

Dual-stage frontal airbags for driver and front outboard passenger
Seat-mounted side-impact airbags for driver and front outboard passenger
Head-curtain airbags for front and rear outboard seating positions
Front outboard Passenger Sensing System
StabiliTrak electronic stability control with Proactive Roll Avoidance and traction control
Electronic trailer sway control
Hill Start Assist
Tire Pressure Monitoring System with Tire Fill Alert
Teen Driver configurable feature
Rear Seat Reminder
Unauthorized-entry theft-deterrent system
OnStar and GMC connected services capable
Brake lining wear indicator

Warranty

3-year/36,000-mile Bumper-to-Bumper Limited Warranty (whichever comes first)
5-year/60,000-mile Limited Powertrain Warranty (whichever comes first; transferable)
5-year/60,000-mile 24/7 Roadside Assistance (whichever comes first)
5-year/60,000-mile Courtesy Transportation (whichever comes first)
3-year/36,000-mile cosmetic corrosion coverage under the New Vehicle Limited Warranty
6-year/100,000-mile rust-through corrosion coverage (whichever comes first)