Legacy GMC · Slidell, LA

2021 GMC Sierra 1500 AT4

90,326 miles · truck

1 / 31 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2021

MakeGMC

ModelSierra 1500

TrimAT4

VIN3GTP9EED4MG212222

Stock number26G1569A

Mileage90,326 miles

BodyPickup

Engine5.3L 8-cyl

Cylinders8

Displacement5.3L

TransmissionAutomatic

Drivetrain4WD

FuelGasoline

MPG15 city / 21 hwy

ExteriorSummit White

Towing9200

Vehicle description

Legacy Buick GMC has a wide selection of exceptional pre-owned vehicles to choose from, including this 2021 GMC Sierra 1500. Is it possible to fall in love with a vehicle? It is when your vehicle is as prestige as the GMC Sierra 1500. Do you encounter heavy snow, rain or mud when driving? No problem. With this vehicle, you've got the power of 4WD to help you overcome the toughest terrain. This is about the time when you're saying it is too good to be true, and let us be the one's to tell you, it is absolutely true. You can finally stop searching... You've found the one you've been looking for.

Features & options (250)

Adaptive Cruise Control
Bluetooth®
Heated Steering Wheel
Remote Start
4WD/AWD
Android Auto
Apple CarPlay
Leather Seats
Wi-Fi Hotspot
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
Body-color door handles
17" full-size spare steel wheel with Black finish
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
Rear wheelhouse liners
Body-color rear bumper
LED fog lamps
Help minimize glare in adverse driving conditions
Cargo bed LED lighting
Provides light to find cargo in the bed
Rear pillar lamps
Black mirror caps
Spray-on bedliner
Includes logo
Cab-mounted cargo area lamps
With switch in switch bank left of the steering wheel
Illuminates the cargo bed area
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
18" machined aluminum wheels with Dark Grey accents
Tailgate and bed rail protection caps
17" 265/70R17SL all-season, blackwall spare tire
Body-color front bumper
Power sliding rear window with rear defogger
AT4 high clearance step
Low profile cast aluminum step with Sierra logo
18" LT275/65R18C Mud-Terrain Goodyear Wrangler DuraTrac blackwall tires
Routine tire rotations are strongly recommended
Power sunroof
Retracts into the roof
Offers tilt and slide features with express-open and -close
Summit White
Front license plate bracket
IntelliBeam
USB ports
2 located on instrument panel
12-volt auxiliary rear power outlet
Second row includes 2 USB charging-only ports
Ventilated driver and front passenger seats
Individually controlled
Cooling feature includes both seatbacks and cushions
Rear window defogger
Premium front floor liners with removable carpet insert
Steering column lock control
Manual tilt and telescoping steering column
Provides extra comfort when entering or exiting the vehicle
Front center console
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)
Premium rear floor liners with removable carpet insert
Carpeted floor covering
Color-keyed to match the interior
120-volt power outlet
3-prong auxiliary household-style outlet
Located on the instrument panel
USB Ports (Inside Console with bucket seats), 2 also includes 1 SD card reader and auxiliary jack
Assist handles
Front A-pillar mounted for Driver and Passenger
Rear B-pillar mounted
Front bucket seats
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
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
Power windows with rear express-down
Driver memory
120-volt box-mounted power outlet
Located in the pickup bed
Outside temperature display
Located in infotainment display
Heated driver and front outboard passenger seats
Rear air vents
Provides cabin comfort for rear occupants
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
Head-Up Display
Multi-color 15" Diagonal Head-Up Display
Adjustable vertical position and brightness of the display
Universal Home Remote
3-channel programmable
Rear Camera Mirror
Jet Black with Kalahari accents, Perforated leather front seat trim
8" diagonal, digital Driver Information Center
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
Red vertical recovery hooks
Hill Descent Control
Uses antilock braking to help provide a smooth, controlled descent
Activates by pushing a button below the instrument panel
Pickup bed
Roll-formed high-strength steel
Skid plates
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
Heavy-Duty Air Filter
170-amp alternator
Off-Road suspension with 2" factory lift
Monotube Rancho shocks
Provides more ground clearance
Improved approach and departure angles
3.23 rear axle ratio
7,000 lbs. GVWR
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
4-wheel antilock disc brakes
Integrated trailer brake controller
Integrated with the antilock brake system (ABS)
Dual-outlet exhaust
Integrated into rear bumper
Premium exhaust outlets
Aluminized stainless-steel muffler and tailpipes
Cargo tie-downs
12-fixed rated at 500 lbs. per corner
Four wheel drive
Automatic locking rear differential
Emissions, Federal requirements
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
AT4 Preferred Package
8" diagonal Premium GMC Infotainment with Navigation
Bose Premium Sound System with Richbass woofer
Rear sliding power window
AT4 Preferred Equipment Group includes standard equipment
AT4 Premium Package
Bose Premium Audio 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
18" LT275/65R18C MT blackwall Goodyear Wrangler DuraTrac tires
Driver Alert Package II
Lane Keep Assist with Lane Departure Warning
Automatic Emergency Braking
Front Pedestrian Braking
Forward Collision Alert
Following Distance Indicator
Adaptive Cruise Control - Camera
Safety Alert Seat
Technology Package
HD Surround Vision with Two Trailer View Camera Provisions
Bed View Camera
8" diagonal Digital Driver Information Center on SLT and AT4
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

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$33,988Dealer asking price · 90,326 mi

Market value$34,300Market value · based on 3 comparable cars

vs. market Fair price-0.9%Fair price · based on 3 comparable cars

Where this price sits

In the typical middle range · 67% of 3 similar listings ask more than this car.

Market value $34,300

This car$33,988

$31,154lowest$34,988highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

Fair price$312 below the market value of $34,300

Price range

$31,154$34,988

2nd lowest price of 4 similar listings within 50 milesTick marks the market value · range of 3 similar listings

AutosXchange Insights

Compared with 3 used 2020–2021 GMC Sierra 1500 AT4 listings within 50 mi.
Priced $312 below the market value of 3 comparable cars.
2nd lowest price of 4 similar listings within 50 miles.
Has about 15,000 fewer miles than similar listings.
About 15,054 miles per year of age (U.S. average is roughly 12,000–14,000).
Stock # 26G1569A — 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 ($33,988).0 price changes at this dealership: $33,988 → $33,988.

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 2020–2021 Sierra 1500 AT4 · used · any miles · within 50 miles of Slidell, Louisiana. All 3 comparable cars for sale, nearest first.

2020 GMC Sierra 1500 AT4 for sale at Legacy GMC in Slidell, LA

Fair price

33 photosCARFAX

2020 GMC Sierra 1500 AT4

$34,988est. $602/mo

$1,000 more than this car

105,252 mi
4WD
Automatic
Gasoline
Truck

Legacy GMC · Slidell, LA · 0 mi away

0 viewsStock # 26G2548A

Check availability Call

2020 GMC Sierra 1500 AT4 for sale at Mossy Motors in New Orleans, LA

Good deal

36 photosCARFAX

2020 GMC Sierra 1500 AT4

$31,154est. $536/mo

$2,834 less than this car

123,084 mi
4WD
Automatic
Diesel
Truck

Mossy Motors · New Orleans, LA · 31 mi away

0 viewsStock # DD6314B

Check availability Call

2021 GMC Sierra 1500 AT4 for sale at Legacy West Bank Buick GMC in Harvey, LA

Fair price

5 photos

2021 GMC Sierra 1500 AT4

$34,300est. $591/mo

$312 more than this car

93,036 mi
4WD
Automatic
Gasoline
Truck

Legacy West Bank Buick GMC · Harvey, LA · 33 mi away

0 viewsStock # 26W4940A

Check availability Call

2020 GMC Sierra 1500 AT4105,252 miles · Legacy GMC · Slidell, LA · 0 mi away$34,988$1,000 more than this car

2020 GMC Sierra 1500 AT4123,084 miles · Mossy Motors · New Orleans, LA · 31 mi away$31,154$2,834 less than this car

2021 GMC Sierra 1500 AT493,036 miles · Legacy West Bank Buick GMC · Harvey, LA · 33 mi away$34,300$312 more than this car

AutosXchange Intel uses current dealer-advertised asking prices, not completed sales or appraisals. It compares the same trim and condition (new or used) where at least three are listed nationwide, and adjusts the expected price for mileage; it is not adjusted for options, condition or accident history. Similar listings are searched within 50, 100 and 250 miles of the dealer first, then the dealer's state, then nationwide. The left gauge spans ±25% of the expected price. How AutosXchange price analysis works