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Frontier Ford · Anacortes, WA

2021 GMC Sierra 1500 AT4

55,102 miles · truck

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2021
MakeGMC
ModelSierra 1500
TrimAT4
VIN
Stock numberP19440
Mileage55,102 miles
BodyPickup
Engine3.0L 6-cyl turbo
Cylinders6
Displacement3.0L
Transmission10-Speed Automatic
Drivetrain4WD
FuelDiesel
MPG22 city / 26 hwy
ExteriorOnyx Black
InteriorJet Black

Vehicle description

This 2021 GMC Sierra 1500 AT4 delivers premium truck capability with confident style. The 3.0L diesel I6 engine paired with a 10-speed automatic transmission produces impressive EPA-estimated 22 city / 26 highway MPG, with actual mileage that may vary. With just over 55,000 miles, this 4WD crew cab offers years of dependable use ahead. - Automatic temperature control with front dual zone A/C - Apple CarPlay and Android Auto compatibility - Heated steering wheel and heated front seats - Perforated leather-appointed front seat trim - 18 machined aluminum wheels - HD rear vision camera - Remote vehicle starter system - GMC premium infotainment system with SiriusXM 360L - Ventilated front seats - Off-road suspension with hill descent control The AT4 trim is engineered for genuine off-road performance while delivering everyday comfort. Jet black exterior paint and jet black perforated leather interior create a sophisticated, rugged appearance. One-owner history and a full Carfax record underscore this truck's well-maintained condition. Trailering package and integrated trailer brake controller make hauling straightforward, while amenities like the remote starter, keyless entry, and GMC connected services add modern convenience to traditional truck toughness. Visit us today to experience this well-equipped Sierra 1500 AT4 in person. Our team is ready to discuss your financing options and set up a test drive.

Features & options (141)

  • Bluetooth®
  • Heated Steering Wheel
  • Remote Start
  • 4WD/AWD
  • Android Auto
  • Apple CarPlay
  • Heated Seats
  • Keyless Entry
  • Leather Seats
  • Wi-Fi Hotspot
  • Auto Dimming Mirror
  • Emergency Brake Assist
  • Rear View Camera
  • Satellite Radio
  • Tow Hitch/Tow Package
  • Turbo Charged Engine
  • Alloy Wheels
  • Cruise Control
  • Preferred Equipment Group 4SB
  • Trailering Package
  • 6 Speakers
  • 6-Speaker Audio System Feature
  • AM/FM radio: SiriusXM with 360L
  • Premium audio system: GMC Infotainment System
  • Radio data system
  • Radio: Premium GMC Infotainment Sys w/Multi-Touch
  • SiriusXM w/360L
  • Steering Wheel Audio Controls
  • Air Conditioning
  • Automatic temperature control
  • Electric Rear-Window Defogger
  • Front dual zone A/C
  • Rear window defroster
  • 12-Volt Rear Auxiliary Power Outlet
  • 120-Volt Bed Mounted Power Outlet
  • 120-Volt Instrument Panel Power Outlet
  • Driver Memory
  • Memory seat
  • Power driver seat
  • Power Front Passenger Windows w/Express Up/Down
  • Power Front Windows w/Driver Express Up/Down
  • Power Rear Windows w/Express Down
  • Power steering
  • Power windows
  • Remote keyless entry
  • Remote Vehicle Starter System
  • Steering wheel mounted audio controls
  • Auto-Locking Rear Differential
  • Electrical Lock Control Steering Column
  • Manual Tilt-Wheel & Telescoping Steering Column
  • Off-Road Suspension
  • Speed-sensing steering
  • Traction control
  • 4-Wheel Disc Brakes
  • ABS brakes
  • Dual front impact airbags
  • Dual front side impact airbags
  • Front anti-roll bar
  • Front wheel independent suspension
  • Keyless Open & Start
  • Low tire pressure warning
  • Occupant sensing airbag
  • Overhead airbag
  • Power Door Locks
  • Brake assist
  • Electronic Stability Control
  • Hill Descent Control
  • Delay-off headlights
  • Front fog lights
  • Fully automatic headlights
  • Panic alarm
  • Security system
  • Theft Deterrent System (Unauthorized Entry)
  • Speed control
  • 170 Amp Alternator
  • 220 Amp Alternator
  • Auxiliary External Transmission Oil Cooler
  • Block heater
  • Engine Block Heater
  • Heavy-Duty Air Filter
  • Auto-dimming door mirrors
  • Body-Color Surround Grille
  • Bumpers: body-color
  • Heated door mirrors
  • LED Cargo Area Lighting
  • Power door mirrors
  • ProGrade Trailering System
  • Rear step bumper
  • Rear Wheelhouse Liners
  • Spray-On Pickup Bed Liner w/AT4 Logo
  • 2 USB Ports
  • 2 USB Ports (1st Row)
  • 4.2" Diagonal Color Display Driver Info Center
  • 4G LTE Wi-Fi Hotspot Capable
  • Apple CarPlay/Android Auto
  • Auto-dimming Rear-View mirror
  • Color-Keyed Carpeting Floor Covering
  • Compass
  • Driver door bin
  • Driver vanity mirror
  • Floor-Mounted Center Console
  • Front Prem Floor Liners w/Removable Carpet Insert
  • Front reading lights
  • GMC Connected Access Capable
  • HD Rear Vision Camera
  • Illuminated entry
  • OnStar & GMC Connected Services Capable
  • Outside temperature display
  • Overhead console
  • Passenger vanity mirror
  • Rear Dual USB Charging-Only Ports
  • Rear Prem Floor Liners w/Removable Carpet Insert
  • Rear reading lights
  • Rear seat center armrest
  • Tachometer
  • Telescoping steering wheel
  • Tilt steering wheel
  • Trip computer
  • Voltmeter
  • 10-Way Power Driver Seat Adjuster w/Lumbar
  • 10-Way Power Passenger Seat Adjuster w/Lumbar
  • Front Bucket Seats
  • Front Center Armrest
  • Heated Driver & Front Outboard Passenger Seating
  • Heated front seats
  • Perforated Leather-Appointed Front Seat Trim
  • Power passenger seat
  • Split folding rear seat
  • Ventilated Driver & Front Passenger Seats
  • Ventilated front seats
  • Passenger door bin
  • Hitch Guidance
  • Hitch Guidance w/Hitch View
  • In-Vehicle Trailering App
  • Integrated Trailer Brake Controller
  • Red Recovery Hooks
  • 18" x 8.5" Machined Aluminum Wheels
  • Deep-Tinted Glass
  • Variably intermittent wipers
  • 3.23 Rear Axle Ratio
  • CAR FAX ONE OWNER**

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 100 miles of Anacortes, Washington
Asking price$38,977Dealer asking price · 55,102 mi
Market value$35,574Market value · based on 4 comparable cars
vs. market High price+9.6%High price · based on 4 comparable cars

Where this price sits

Among the highest-priced · 25% of 4 similar listings ask more than this car.

$33,900lowest$39,949highest
Middle 50% of asking pricesMarket valueThis car

Price vs. market value

+9.6%
−25%Market value+25%
High price$3,403 above the market value of $35,574

Price range

$38,977
$33,900$39,949
4th lowest price of 5 similar listings within 100 milesTick marks the market value · range of 4 similar listings

AutosXchange Insights

  • Compared with 4 used 2020–2022 GMC Sierra 1500 AT4 listings within 100 mi.
  • Priced $3,403 above the market value of 4 comparable cars — compare options, condition and history.
  • 4th lowest price of 5 similar listings within 100 miles.
  • Has about 25,000 fewer miles than similar listings.
  • About 9,184 miles per year of age (U.S. average is roughly 12,000–14,000).
  • Stock # P19440 — 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 9, 2026. No price change at this dealership since Nov 9 ($38,977).0 price changes at this dealership: $38,977 → $38,977.

$38.7k$38.8k$38.9k$39.0k$39.1k$39.2kNov 9Nov 10Nov 12

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

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 AT4 · used · any miles · within 100 miles of Anacortes, Washington. All 4 comparable cars for sale, nearest first.

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

More GMC Sierra 1500 near Anacortes

All years and trims. Nearest first.

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