Used 2021 Gmc Sierra 1500 AT4

$42,997

Financing as low as $703 per month.

Key Features

Mileage

39,467

Drivetrain

4WD

Engine

3L I6 DOHC Turbo

Transmission

10 Speed Automatic

Fuel Type

Diesel

MPG

22 / 26

Color

Summit White / Jet Black W/Kalahari Accents

Title

Clean

Contact Seller

Di

Diehl of Robinson

6181 Steubenville Pike

McKees Rocks, PA 15136

By submitting this form, you agree to be contacted by the seller.

Dealer Description

2021 GMC Sierra 1500 AT4 Crew Cab 4x4 — Duramax Diesel, CarbonPro Bed, Tech Package, and Off Road Luxury. If a truck could wear a fitted tuxedo and steel toe boots at the same time, it would be this 2021 GMC Sierra 1500 AT4 Crew Cab 4x4. Built for drivers who want real off road capability wrapped in premium comfort, this AT4 checks every box and even invents a few new ones. Powered by the legendary 3.0L Duramax turbo diesel, this Sierra delivers smooth torque, impressive fuel efficiency, and the kind of quiet strength that makes towing feel effortless. Paired with GMC’s advanced 4x4 system, off road suspension, skid plates, and hill descent control, the AT4 is built for mud, highway, snow, and more. The exterior finishes the one you will compare to.

Features & Options

  • backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera backup camera.
  • Backup Camera
  • Tow Package
  • Fog Lights
  • Side-Impact Air Bags
  • Bluetooth
  • Alloy Wheels
  • Leather Seats
  • Automatic Climate Control
  • Cruise Control

Vehicle History Report

VIN: 1GTU9EET8MZ256542

Check this vehicle's history for accidents, service records, ownership, and more.

Seller Details

Listed 11/23/2025

View original listing
Di

Diehl of Robinson

6181 Steubenville Pike

McKees Rocks, PA 15136

Phone

412-282-7000

Location

Contact Seller

Di

Diehl of Robinson

6181 Steubenville Pike

McKees Rocks, PA 15136

By submitting this form, you agree to be contacted by the seller.

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