Used 2021 Gmc Sierra 1500 AT4

$44,758

Financing as low as $731 per month.

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Key Features

Mileage

39,508

Drivetrain

4WD

Engine

6.2L V8

Transmission

Automatic

Fuel Type

Gasoline

MPG

16 / 21

Color

Onyx Black / Jet Black With Kalahari Accents

Title

Clean

Contact Seller

Mi

Michigan City Kia

710 E. US Hwy 20

Michigan City, IN 46360

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

Dealer Description

Experience rugged capability and premium refinement with this 2021 GMC Sierra 1500 AT4, a truck engineered to deliver power, style, and innovation both on and off the road. With only 39,000 miles, this Sierra stands out as a well-maintained, low-mileage option for anyone seeking a powerful half-ton pickup with true off-road pedigree. Under the hood, the commanding 6.2L V8 engine provides exceptional performance, delivering robust horsepower and torque that makes towing, hauling, or conquering rough terrain effortless. The AT4s off-road suspension, skid plates, and AT4 High Clearance Step enhance capability while maintaining everyday practicality. Paired with GMCs trail-ready engineering, this truck is equally confident on highways, job sites, and backcountry trails. Finished in a striking Onyx Black exterior, this Sierra AT4 is complemented by bold 20-inch aluminum wheels, aggressive styling cues, and signature AT4 badging that distinguish it from the crowd. The design balances strength and sophistication, projecting a modern, upscale presence that GMC trucks are known for. Inside, the cabin blends durability with refinement. The interior features Jet Black leather with Kalahari accents, creating a premium environment with sporty contrast. Thoughtful ergonomics, intuitive technology, and high-quality materials ensure comfort on every drive. With advanced infotainment, driver-assist features, and spacious seating, the Sierra AT4 provides convenience and confidence whether you're commuting or adventuring off the grid. If you're looking for a truck that delivers the perfect mix of power, ruggedness, and refinement, this 2021 GMC Sierra 1500 AT4 with the 6.2L V8 is an outstanding choice. With its low mileage, premium features, and trail-ready design, it's built to exceed expectations.

Features & Options

  • Off-road suspension
  • Skid plates
  • AT4 High Clearance Step
  • 20-inch aluminum wheels
  • Aggressive styling cues
  • Signature AT4 badging
  • Leather seat upholstery
  • Heated driver mirror
  • Heated passenger mirror
  • Heated steering wheel
  • Leather/metal-look steering wheel trim
  • Machined aluminum rims w/ painted accents
  • Memorized Settings for 2 drivers
  • Power remote w/tilt down driver mirror adjustment
  • Power remote w/tilt down passenger mirror adjustment
  • Power retractable mirrors
  • Premium GMC Infotainment System
  • Remote Engine Start : Keyfob remote start
  • Remote power door locks
  • Remote window operation
  • SiriusXM with 360L AM/FM/HD/Satellite

Vehicle History Report

VIN: 3GTP9EEL0MG403790

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Seller Details

Listed 8/25/2025

View original listing
Mi

Michigan City Kia

710 E. US Hwy 20

Michigan City, IN 46360

Phone

219-214-1770

Location

Contact Seller

Mi

Michigan City Kia

710 E. US Hwy 20

Michigan City, IN 46360

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

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