Used 2021 Gmc Sierra 1500 AT4

$38,554

Financing as low as $630 per month.

Key Features

Mileage

81,487

Drivetrain

4WD

Engine

3L I6 DOHC Turbo

Transmission

10 Speed Automatic

Fuel Type

Diesel

MPG

22 / 26

Color

Onyx Black / Jet Black With Kalahari Accents

Title

Clean

Contact Seller

Ca

Cargill Chevrolet

23 LIVERY ST

Putnam, CT 06260

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

Dealer Description

2021 GMC Sierra 1500 AT4 with the 3.0L Duramax Turbo-Diesel engine combines rugged capability with refined comfort, making it a standout in the full-size pickup segment. Powered by a 3.0-liter inline-six turbo-diesel engine producing 277 horsepower and 460 lb-ft of torque, this truck delivers impressive towing and hauling abilities while maintaining excellent fuel efficiency. Paired with a smooth 10-speed automatic transmission, the Sierra 1500 AT4 offers seamless performance both on highways and off-road trails. The AT4 trim elevates the Sierras off-road prowess with features such as a factory-equipped 2-inch suspension lift, skid plates, and a locking rear differential, ensuring superior traction and ground clearance in challenging conditions. Its off-road tires and unique blacked-out grille contribute to a rugged, aggressive look that stands out on and off the pavement. Inside, the cabin balances luxury and utility with premium materials, comfortable seating, and advanced technology. The 2021 model includes the GMC infotainment system with a large touchscreen, Apple CarPlay, Android Auto, and a built-in Wi-Fi hotspot, keeping drivers connected wherever they go. Additional convenience features like wireless charging and a head-up display further enhance the driving experience. Safety is also a priority, with a suite of driver assistance features including forward collision alert, lane keep assist, and adaptive cruise control. Overall, the 2021 GMC Sierra 1500 AT4 3.0L is a powerful, versatile pickup that meets the demands of both work and adventure with style and capability.

Features & Options

  • Leather upholstery
  • Automatic temperature control
  • Wireless phone connectivity
  • Front dual zone A/C
  • Auto-dimming rearview mirror
  • Split folding rear seat
  • Memory seat
  • Heated front seats
  • Ventilated front seats
  • Perimeter/approach lights
  • Remote keyless entry
  • Heated steering wheel
  • AT4 Preferred Package
  • AT4 Value Package
  • Driver Alert Package I
  • Driver Alert Package II
  • Preferred Equipment Group 4SB
  • Technology Package
  • Trailering Package
  • Premium Bose 7-Speaker Sound System
  • Apple CarPlay/Android Auto

Vehicle History Report

VIN: 1GTU9EET8MZ279142

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

Seller Details

Listed 12/5/2025

View original listing
Ca

Cargill Chevrolet

23 LIVERY ST

Putnam, CT 06260

Phone

860-928-6591

Location

Contact Seller

Ca

Cargill Chevrolet

23 LIVERY ST

Putnam, CT 06260

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

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