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Used

About this vehicle

Experience the rugged elegance of the 2021 GMC Sierra 1500 AT4, a powerful crew cab pickup designed for both work and play. With its striking Ebony Twilight Metallic exterior and luxurious Jet Black with Kalahari accents interior, this truck stands out on any terrain.

Mileage88,478 mi

Engine3.0L Straight 6 Cylinder Engine

Drivetrain4WD

Transmission10-Speed A/T

Fuel typeDiesel

More to know

Whether you’re hauling gear for a weekend adventure or navigating city streets, the Sierra 1500 AT4 combines versatility with style. Don’t miss your chance to own this well-equipped truck—schedule a test drive today and see why this pickup is a top choice for drivers who value performance and sophistication.
This GMC Sierra 1500 AT4 is ideal for those who demand both capability and comfort in their daily drives or weekend getaways. With its robust performance and upscale features, it’s ready to tackle any challenge you throw its way. Visit today to experience the power and luxury of this exceptional pickup firsthand.
Duramax 3.0L Turbo-Diesel I6 Engine: Delivers 277 hp and 460 lb-ft of torque for impressive towing and hauling capabilities.
10-Speed Automatic Transmission: Provides smooth shifting and enhanced performance with tow/haul mode for added control.
Premium GMC Infotainment System: Features an 8" diagonal color touch-screen with Bluetooth streaming, Apple CarPlay, and Android Auto for seamless connectivity.
Heated and Cooled Front Seats: Ensures comfort in any weather, making every drive enjoyable.
4WD Capability: Offers superior traction and stability, perfect for off-road adventures or challenging weather conditions.
CARFAX 1-Owner: Purchase with confidence knowing this vehicle has a clean history.

CARFAX

CARFAX Snapshot

2021 GMC Sierra 1500 AT4

✓Verified vehicle history available for this VIN
✓Service records, ownership, and reported events
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Vehicle history data provided by CARFAX. See full report for complete details.

Specifications

VIN: 1GTU9EET4MZ397110
Stock: 1434
Year: 2021
Make: Gmc
Model: Sierra 1500
Trim: AT4
Body: Crew Cab Pickup
Mileage: 88,478 mi
Title: 2021 GMC Sierra 1500 AT4
Engine: 3.0L Straight 6 Cylinder Engine
Fuel: Diesel
Drivetrain: 4WD
Transmission: 10-Speed A/T
Exterior: Ebony Twilight Metallic
Interior: Jet Black with Kalahari accents
Condition: Used

Features & equipment

ENGINE
DURAMAX 3.0L TURBO-DIESEL I6 (277 hp [206.6 kW] @ 3750 rpm, 460 lb-ft of torque [623.7 N-m] @ 1500 rpm) Includes (KW5) 220-amp alternator and (K05) engine block heater.) (Standard on TK10743 models.
TRANSMISSION

Fuel economy

City MPG

EPA-estimated ratings when provided by the manufacturer. Actual mileage and range may vary.

Why buy from Renn Kirby

Frontline units marked Maryland Inspected passed in our shop
Family owned in Frederick since 1938
EV & hybrid service specialists
Se habla español — sales & service

Protect this vehicle after you buy

Ask for a Major Guard, GAP, or maintenance quote on this VIN. Optional — never required to get financed.

Request protection quote

Build this truck with the full Rough Country line

Ask sales to package any in-catalog item with this vehicle — lift, level, bumper, armor, lights, winch, steps, wheels, bed cover, or Jeep extras — or book the shop after you buy.

Get a fitment quote

Book service while you shop

Schedule an oil change, Maryland inspection, brakes, or tires the same day as your test drive — $150/hour shop labor, ASE-certified techs on Buckeystown Pike.

View service menu Prefer we come to you?Need pickup & delivery?Call service: (301) 835-1283

Mobile Service: a tech comes to you (~50 miles). Pickup & delivery: we take the car to the shop and bring it back.

Pricing disclaimer

Advertised price excludes tax, title, license, and documentary preparation fees. See dealer for complete details. One Time Price reflects our no-haggle approach. Eligible discounts (e.g. trade-in or financing promotions) may apply — ask your sales consultant.