Used 2021 Gmc Sierra 1500 AT4

 59,655 miles
 Gas
 Ephrata, PA

$38,700

AI Analysis:

$39,153 average market price. You save $453 (1%). 

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Key Features

Mileage

59,655 miles

Drivetrain

4WD

Engine

5.3L 8 Cylinder

Transmission

10 Speed Automatic

Fuel Type

Gas

MPG

16 / 21

Color

Onyx Black / Jet Black With Kalahari Accents

Title

Clean

Contact Seller

Ma

Mark Martin Motors

4126 Oregon Pike

Ephrata, PA 17522

Ephrata, PA 17522

Financing Available

Pre-qualification takes just minutes. Compare multiple offers and save!

$655 / month

  • Rates as low as 4.09% APR

  • Browse multiple offers

  • Same-day approval

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Dealer Description

This 2021 GMC Sierra 1500 AT4 4WD in Onyx Black delivers the perfect mix of factory off-road capability, V8 power, and premium GMC refinement. Powered by the proven EcoTec3 5.3L V8 paired with a 10-Speed Automatic transmission, this AT4 is built to tow hard, handle rough terrain, and still drive comfortably every day. With 8,312 miles below market average, this is a standout opportunity in Lancaster County, Central Pennsylvania, Harrisburg, York, Reading, and the Mid-Atlantic region. This is not a basic pickup. This is AT4 purpose built. This Sierra AT4 delivers real V8 muscle, factory off-road hardware, and premium interior comfort without stepping into new-truck pricing. Ideal for buyers who want a truck that works during the week, explores on the weekend, and looks right doing both. Power. Presence. Capability. AT4 done right.

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 lights
  • Remote keyless entry system with keyless entry and start.
  • Apple CarPlay/Android Auto.
  • Power steering seat with driver assist package.
  • Rear Vision Camera.
  • Blind Spot Monitor.
  • Moon Roof.
  • Lane Change Alert with Side Blind Zone Alert.
  • Rear Cross Traffic Alert.
  • HD Rear Vision Camera.
  • Front and rear park assist.
  • ProGrade Trailering System with integrated trailer brake controller.

Vehicle History Report

VIN: 3GTP9EED8MG259012

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

Seller Details

Listed 1/25/2026

View original listing
Ma

Mark Martin Motors

4126 Oregon Pike

Ephrata, PA 17522

Ephrata, PA 17522

Phone

888-726-**** Show number

Location

Contact Seller

Ma

Mark Martin Motors

4126 Oregon Pike

Ephrata, PA 17522

Ephrata, PA 17522

Financing Available

Pre-qualification takes just minutes. Compare multiple offers and save!

$655 / month

  • Rates as low as 4.09% APR

  • Browse multiple offers

  • Same-day approval

Get pre-qualified

Powered by MyAutoLoan.

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