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MD inspectedUsed

Stock #U8409

2021 GMC Sierra 1500 AT4

122,594 mi · Summit White · Jet Black with Kalahari accents

Price dropped

One Time Price

Price breakdown

Sales Price: $31,100
Dealer processing fee (not required by law): +$795
Kirby Price: $31,895

Before taxes, title, registration, and tags.

Maryland safety inspected · registration-ready

Estimated monthly payment

$411/mo*

Starting point: 20% down · 72 months

Down payment: $6,500 (20%)

*Estimated monthly payment is for illustration only and is not an offer or guarantee of financing. Actual payment, rate and terms depend on lender approval, credit qualifications, down payment, and applicable taxes and fees. Kirby Price includes the $795 dealer processing fee. Taxes, title, registration, and tags are additional.

Get financedText us

VIN: 3GTU9EET6MG443150
Stock #: U8409

Call (301) 835-1283

About this vehicle

This 2021 GMC Sierra 1500 AT4 pairs a Duramax 3.0L turbo-diesel with 4WD and a 10-speed automatic transmission for a capable, well-equipped pickup. Finished in Summit White with a Jet Black interior and Kalahari accents, it has 122,594 miles.

Mileage122,594 mi

Engine3.0L Straight 6 Cylinder Engine

Drivetrain4WD

Transmission10-Speed A/T

Fuel typeDiesel

More to know

Visit us in the Frederick, Maryland area to see the truck in person and take a test drive. Please confirm equipment details before purchase.
This Sierra may suit drivers looking for a diesel-powered 4WD crew cab with useful towing-focused features and connected infotainment. Its AT4 trim and distinctive interior accents add a considered touch to a practical pickup.
Duramax diesel power: The 3.0L inline-six produces 277 horsepower and 460 lb-ft of torque.
10-speed automatic: Overdrive, Tow/Haul mode, Cruise Grade Braking, and Powertrain Grade Braking support varied driving and towing needs.
Premium GMC infotainment: The 8-inch touchscreen includes Bluetooth audio, wireless Apple CarPlay and Android Auto capability for compatible phones, voice recognition, and in-vehicle apps.
20-inch machined aluminum wheels: Carbon Grey Metallic accents complement the AT4’s Summit White exterior.
Hitch Guidance with hitch view: Included with the trim to help when lining up a trailer.

Maryland State Safety Inspection

Sold inspected. Ready to register.

Maryland will not title or register a used vehicle until it passes a state safety inspection at a licensed station. This one already has.

Included in the price

What that means for your price

Everything the state requires — the inspection itself, plus any repair needed to pass it — is completed in our own shop before this vehicle is listed. A car sold without that certificate leaves the inspection, and whatever it turns up, to the buyer after the sale. Our price already has that work in it.

The inspection alone is a $95 service in our service department. On this vehicle it is already done.

Checked to Maryland standards

Brakes, lines & parking brake
Steering, suspension & ball joints
Tires, wheels & wheel fasteners
Lights, signals & electrical
Glass, wipers & mirrors
Exhaust & fuel system
Frame, floor & underbody
Seat belts & safety equipment
Speedometer & odometer

A Maryland Safety Inspection Certificate confirms the vehicle met state safety standards when it was inspected. It is not a warranty, service contract, or guarantee of future mechanical condition.

CARFAX

CARFAX Snapshot

2021 GMC Sierra 1500 AT4

✓Verified vehicle history available for this VIN
✓Service records, ownership, and reported events
✓Shop with confidence — transparency built in

View dealer on CARFAX

Vehicle history data provided by CARFAX. See full report for complete details.

Specifications

VIN: 3GTU9EET6MG443150
Stock: U8409
Year: 2021
Make: Gmc
Model: Sierra 1500
Trim: AT4
Body: Crew Cab Pickup
Mileage: 122,594 mi
Title: 2021 GMC Sierra 1500 AT4
Engine: 3.0L Straight 6 Cylinder Engine
Fuel: Diesel
Drivetrain: 4WD
Transmission: 10-Speed A/T
Exterior: Summit White
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

Kirby Price is the sales price plus the $795 dealer processing fee (not required by law). Taxes, title, registration, and tags are additional. A trade-in allowance or a financing discount is separate and is not already taken off Kirby Price. One Time Price means that Kirby Price is not haggled.