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Used

About this vehicle

SLT trim, Onyx Black exterior and Jet Black interior. CARFAX 1-Owner, Excellent Condition.

Mileage63,135 mi

Engine6.6L 8 Cylinder Engine

Drivetrain4WD

Transmission10-Speed A/T

Fuel typeDiesel

More to know

<br /><br />Pricing analysis performed on 10/18/2026. Horsepower calculations based on trim engine configuration.
), SLT CONVENIENCE PACKAGE includes (A50) bucket seats with (D07) center console, (KQV) ventilated front seats, (A48) rear sliding power window, (UG1) Universal Home Remote, (MCR) USB Ports (Inside Console with bucket seats), (MCZ) 2 USB ports with auxiliary input and (KA6) rear heated seats; Single rear wheel models also include (U01) Roof Marker Lamps, GOOSENECK / 5TH WHEEL PACKAGE includes (Z6A) Gooseneck / 5th Wheel Prep Package.
(Includes (CGN) spray-on bed liner and (UVN) Bed View Camera.
ASSIST STEPS, CHROMED TUBULAR, 6" RECTANGULAR CAB LENGTH (factory installed), GVWR, 14,000 LBS.
), TRANSMISSION, ALLISON 10-SPEED AUTOMATIC, GOOSENECK / 5TH WHEEL PREP PACKAGE -- Hitch platform to accept Gooseneck or 5th Wheel hitch.
Includes hitch platform with tray to accept ball, stamped bed holes with removable caps installed and bed mounted 7-pin trailer harness (similar to UY2 harness).
Please confirm the accuracy of the included equipment by calling us prior to purchase.

CARFAX

CARFAX Snapshot

2021 GMC Sierra 3500HD SLT

✓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: 1GT49UEYXMF241287
Stock: 7397P
Year: 2021
Make: Gmc
Model: Sierra 3500HD
Trim: SLT
Body: Crew Cab Pickup
Mileage: 63,135 mi
Title: 2021 GMC Sierra 3500HD SLT
Engine: 6.6L 8 Cylinder Engine
Fuel: Diesel
Drivetrain: 4WD
Transmission: 10-Speed A/T
Exterior: Onyx Black
Interior: Jet Black
Condition: Used

Features & equipment

ENGINE
DURAMAX 6.6L TURBO-DIESEL V8
B20-DIESEL COMPATIBLE (445 hp [332 kW] @ 2800 rpm, 910 lb-ft of torque [1220 Nm] @ 1600 rpm) (Includes (K05) engine block heater.)
TRANSMISSION
ALLISON 10-SPEED AUTOMATIC (Included and only available with (L5P) Duramax 6.6L Turbo-Diesel V8 engine. Not available with (PTO) Power take-off.)

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.