Legacy GMC · Slidell, LA

2021 GMC Sierra 1500 SLT

18,656 miles · truck

1 / 34 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2021

MakeGMC

ModelSierra 1500

TrimSLT

VIN3GTU9DEL0MG221911

Stock number12392P

Mileage18,656 miles

BodyPickup

Engine6.2L V8

Cylinders8

Displacement6.2L

TransmissionAutomatic

Drivetrain4WD

FuelGasoline

MPG15 city / 20 hwy

ExteriorOnyx Black

Towing8600

Vehicle description

Legacy Buick GMC is honored to present a wonderful example of pure vehicle design... this 2021 GMC Sierra 1500 SLT only has 0mi on it and could potentially be the vehicle of your dreams! This GMC Sierra 1500 SLT's level of quality is not meant for just anyone. It's meant for the person who strives for a classy, comfortable, and luxurious car. Simply put, this Four Wheel Drive is engineered with higher standards. Enjoy improved traction and safety while driving this 4WD GMC Sierra 1500 SLT. This Black GMC is clean and shiny exterior makes it look like it came straight from the factory. This vehicle won't last long, take it home today.

Features & options (250)

Adaptive Cruise Control
Bluetooth®
Heated Steering Wheel
Remote Start
4WD/AWD
Android Auto
Apple CarPlay
Leather Seats
Wi-Fi Hotspot
Auto Dimming Mirror
Automatic High Beams
Emergency Brake Assist
Lane Departure Warning
Lane Keep Assist
Wireless Phone Charging
Blind Spot Monitor
Forward Collision Warning
Navigation System
Parking Assistance
Rear View Camera
Tow Hitch/Tow Package
Turbo Charged Engine
Premium Sound System
Steering-wheel mounted controls
May require additional optional equipment
HD Radio
4G LTE Wi-Fi hotspot capable
Wireless Apple CarPlay/Wireless Android Auto capability for compatible phones
Can use Apple CarPlay and Android Auto wirelessly
Place and receive hands-free phone calls
SiriusXM Radio
8" diagonal Premium GMC Infotainment System with Navigation
HD Radio capability
Bluetooth®streaming audio for music and select phones
Apple CarPlay capability for compatible phones
Android Auto capability for compatible phones
Voice-activated technology for phone
With greater memory
Tailgate with EZ Lift assist, power lock & release
Hitch area lighting
GMC MultiPro Tailgate
Deep-tinted glass
Provides added protection from sun and glare
17" full-size spare steel wheel with Black finish
Grille (Chrome surround with high gloss Black mesh and Chrome inserts.)
Spare tire carrier lock
Helps keep spare tire secure
Utilizes the same key as the door and ignition
Heated, power, driver-side auto-dimming, power-folding outside mirrors
Puddle lamps
Perimeter lighting
Memory setting
LED signature tail lamps
C-shaped LED taillamps with LED stop and reverse light
Brighter and lasts longer than traditional incandescent bulbs
Chrome mirror caps
Rear wheelhouse liners
Chrome rear bumper
With integrated CornerSteps
Cargo bed LED lighting
Provides light to find cargo in the bed
Rear pillar lamps
LED fog lamps
Help minimize glare in adverse driving conditions
Cab-mounted cargo area lamps
With switch in switch bank left of the steering wheel
Illuminates the cargo bed area
Chrome front bumper
LED reflector (high intensity) headlamps with LED turn signals and LED signature Daytime Running Lamps
CornerStep rear bumper
Located at each end of the rear bumper
Textured step pads to help provide secure footing
Full chrome surround window moldings
Tailgate and bed rail protection caps
Chrome door handles
Spray-on bedliner
Includes logo
17" 255/80R17SL all-season, blackwall spare tire
6" chrome rectangular full length assist steps
Textured step pads help provide secure footing
Extends from wheel well to wheel well
Power sliding rear window with rear defogger
20" 275/60R20 all-season, blackwall tires
Power sunroof
Retracts into the roof
Offers tilt and slide features with express-open and -close
Front license plate bracket
IntelliBeam
Onyx Black
4.2" diagonal color Driver Information Center
12-volt auxiliary rear power outlet
120-volt power outlet
3-prong auxiliary household-style outlet
Located on the instrument panel
USB ports
Second row includes 2 USB charging-only ports
Inside rearview auto-dimming mirror
Rear window defogger
Steering column lock control
Manual tilt and telescoping steering column
Provides extra comfort when entering or exiting the vehicle
Power windows
Front passenger with express-up/down
Brake pad wear indicator
Up-level rear seat with storage package
Full-length bench seat
Seatback storage on left and right side
Center fold out armrest with 2 cupholders
Underseat storage (full cab width)
Carpeted floor covering
Color-keyed to match the interior
Assist handles
Front A-pillar mounted for Driver and Passenger
Rear B-pillar mounted
Power windows with rear express-down
Driver with express-up/down
Compass, located in instrument cluster
10-way power driver seat with power lumbar
Moves the seat forward and back, and up and down
Tilt the seat cushion and seatbacks
Power door locks
Programmable
Rear carpeted floor mats
Helps protect your interior from road debris and the elements
Denali models feature unique premium tufted carpeting
10-way power front passenger seat
Forward and back
Up and down
Tilt seat cushion back and upright
Recline seatback up and down
Includes 2-way power lumbar
Theft-deterrent unauthorized entry system
Helps deter unauthorized entry, helping to protect your vehicle
Dual-zone automatic climate control
Allows individual climate settings for both driver and front passenger
Driver memory
Front carpeted floor mats
120-volt box-mounted power outlet
Located in the pickup bed
Outside temperature display
Located in infotainment display
Rear air vents
Provides cabin comfort for rear occupants
Heated driver and front outboard passenger seats
Individually controlled
In-vehicle Trailering App
Checklist
Trailer light sequencing
Trailer maintenance reminders
Trailer security alerts
Trailer mileage
Tow/haul reminder
Trailer electrical diagnostics
Leather-wrapped steering wheel
GMC Connected Access capable
12-volt auxiliary front power outlet
Front center console
Front bucket seats
Universal Home Remote
3-channel programmable
Jet Black, Perforated leather-appointed front outboard seat trim
Ventilated driver and front passenger seats
Cooling feature includes both seatbacks and cushions
Wireless Charging
Uses induction technology for portable electronic devices
Convenient charging location at the front of the center console
Device may require optional case for phones that are compatible
Pickup bed
Roll-formed high-strength steel
3.23 rear axle ratio
Electric Power Steering
Electric, rack-mounted with variable assist
Steering assist is greater during low-speed maneuvers, such as parking
Aluminized stainless-steel muffler and tailpipe
Capless fuel fill
Fully boxed frame
Hydroformed front section
High-strength steel
Black vertical recovery hooks
Two front frame-mounted
Integrated trailer brake controller
Integrated with the antilock brake system (ABS)
4-wheel antilock disc brakes
170-amp alternator
Cargo tie-downs
12-fixed rated at 500 lbs. per corner
7,100 lbs. GVWR
Four wheel drive
Automatic locking rear differential
Emissions override, Federal
2-speed Autotrac Transfer Case
2WD HI mode
Vehicle operates in 2-wheel drive
Suitable for routine driving on all road surfaces
4WD Auto mode
4WD HI mode
4WD LO mode
Neutral
Dual-outlet exhaust
Integrated into rear bumper
Premium exhaust outlets
Aluminized stainless-steel muffler and tailpipes
ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (U1D) In-vehicle Trailering App
Trailering Package
Trailer Hitch
Trailering hitch platform
Includes a 2" receiver hitch, 4-pin and 7-pin connectors
Hitch Guidance
SLT Preferred Equipment Group includes standard equipment
SLT Premium Plus Package
Bucket seats
Center console
Heated and ventilated front seats
Rear power sliding window
2 USB ports with auxiliary input
SLT Preferred Package
8" diagonal Premium GMC Infotainment with Navigation
Bose Premium Sound System with Richbass woofer
Driver Alert Package I
Front and Rear Park Assist
Lane Change Alert with Side Blind Zone Alert
Rear Cross Traffic Alert
Driver Alert Package II
Forward Collision Alert
Lane Keep Assist with Lane Departure Warning
Automatic Emergency Braking
Front Pedestrian Braking
Adaptive Cruise Control-Camera
Following Distance Indicator
20" Polished aluminum wheels
6" Chrome tubular rectangular assist steps
Spray-on bedliner with GMC Logo
SLT Convenience Package
Safety Alert Seat
LED Daytime Running Lamps
Daytime Running Lamps automatically illuminate signature lighting
Rear Seat Reminder
Tire Pressure Monitoring System
Includes Tire Fill Alert
6 airbags
Dual-stage frontal airbags for driver and front outboard passenger
Head-curtain airbags for outboard seating positions
Hitch Guidance with Hitch View
OnStar & GMC Connected Services capable
Teen Driver
HD Rear Vision Camera
This may help you park and avoid nearby objects
If needed, you may receive additional Lane Departure Warning alerts
You can also switch to beeping crash avoidance alerts
This feature works at speeds below 50 mph

Dealer-provided information may change. Confirm availability, price, vehicle condition, taxes and fees with the selling dealership.

AutosXchange Intel

Vehicle price analysis

Live listings · within 50 miles of Slidell, Louisiana

Asking price$53,688Dealer asking price · 18,656 mi

Market value$33,995Market value · based on 8 comparable cars

vs. market High price+57.9%High price · based on 8 comparable cars

Where this price sits

Among the highest-priced · 0% of 8 similar listings ask more than this car.

Market value $33,995

This car$53,688

$25,472lowest$53,688highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

High price$19,693 above the market value of $33,995

Price range

$25,472$53,688

9th lowest price of 9 similar listings within 50 milesTick marks the market value · range of 8 similar listings

AutosXchange Insights

Compared with 8 used 2020–2022 GMC Sierra 1500 SLT listings within 50 mi.
Priced $19,693 above the market value of 8 comparable cars — compare options, condition and history.
9th lowest price of 9 similar listings within 50 miles.
Has about 85,000 fewer miles than similar listings.
About 3,109 miles per year of age (U.S. average is roughly 12,000–14,000).
Stock # 12392P — mention it when you call or text.

How we calculate market value: comparable cars for sale now plus their last listed prices.

Price history

Price tracked by AutosXchange since Nov 6, 2026. No price change at this dealership since Nov 6 ($53,688).

Market activity: Legacy GMC cut prices on 10 2026 GMC Sierra 1500 by an average of $1,500

AutosXchange Intel Hub: Price changes for this model in Louisiana · This model in the Intel Hub · Market movers in Louisiana

Dealer-advertised asking prices as observed by AutosXchange (data as of Nov 12); earlier listings at other dealerships are shown by state only. Source: AutosXchange Intel Hub, autos-xchange.com/market.

Cars this price is compared to

Same 2020–2022 Sierra 1500 SLT · used · any miles · within 50 miles of Slidell, Louisiana. All 8 comparable cars for sale, nearest first.

2021 GMC Sierra 1500 SLT for sale at Legacy GMC in Slidell, LA

Fair price

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