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Active inventory

2021 · AT4

2021 GMC Sierra 1500

$34,931

MSRP $37,299

Mileage: 97,615 mi
Drivetrain: 4x4
Condition: Used
Body style: Truck
Transmission: 10-Speed Automatic
Fuel: Diesel
Exterior: Onyx Black
Interior: Jet Black w/Kalahari Accents
Stock: C14223A
VIN: 3GTU9EET1MG120995

Listed as available at Umansky Chevrolet in Glendale, WI. Inventory last confirmed Aug 12, 2026. Contact the dealer to confirm current availability.

Autorrive Report

What to know about this vehicle

Here’s the official information available for this vehicle as of Aug 29, 2026. If a detail comes from a matching model or configuration rather than this specific vehicle, we’ll say so.

Vehicle specifications

Dimensions, capacity and mechanical details

Dealer-provided specifications

Engine: 3.0L I6
Features: Backup Camera · Tow Package · Fog Lights · Side-Impact Air Bags · Bluetooth · Cruise Control · Remote Start · Push Start · Keyless Entry · Android Auto · Apple Car Play · Wifi Hotspot · Heated Seats · Leather Seats · Power Seats · Automatic Climate Control · Navigation System · Premium Package · Sunroof/Moonroof · Wireless Phone Charging · Technology Package

VIN-decoded details come from NHTSA vPIC. Dealer-provided fields are shown separately and are not used to calculate missing values.

Matched year, make and model · not VIN-specific

NHTSA investigations and service information

Defect investigations

5 NHTSA investigations found for this model year

Loss of motive power due to engine failure

NHTSA action: EA25007 · ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL

Opened Oct 23, 2025

Loss of motive power due to engine failure post recall remedy

NHTSA action: EA26005 · ENGINE

Opened Aug 20, 2026

Air Bag Malfunction

NHTSA action: PE21010 · AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE

Opened Apr 9, 2021 · Closed Aug 24, 2023

Loss of motive power due to engine failure

NHTSA action: PE25001 · ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL

Opened Jan 16, 2025 · Closed Oct 23, 2025 · Related recall 25V274

Loss of motive power due to engine failure post recall remedy

NHTSA action: RQ26001 · ENGINE

Opened Jan 16, 2026 · Closed Aug 20, 2026

Manufacturer communications

1,448 communications found for this model year

These records can include service bulletins, repair instructions, campaigns, warranty extensions, software updates and other manufacturer notices. The total is not a problem rate or reliability score.

View example records

Document 11012189

This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during transit and or long period of stand time at the dealerships.

Document 11012247

This Preliminary information communicates an issue with premature brake pad life and engineering is working on release new pad lining material.

Document 11012690

This warranty administration bulletin provide policy information for variable diagnostic time allowances on select labor operations (U.S. Only).

Document 11012907

This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.

Document 11012908

This service bulletin provides information for customers/dealers/technicians on Normal Camera Display Operation - Flashing Diamond - Spot - or UFO like image on Camera Display.

Document 11012929

This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.

Source: NHTSA Office of Defects Investigation. Checked Aug 29, 2026. Records match 2021 GMC Sierra 1500, not a specific VIN. Search NHTSA records.

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