NGK 21546 OE Replacement Oxygen Sensor for Select GM 2003-14 Trucks/SUVs

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Product Specification:

SKU:NGK21546

MPN: 21546

UPC: 1008729515460

Weight: 0.29 lb

Inventory: 12

Type: Oxygen Sensors

Vehicle Fitment

2003-2014 GM Trucks and SUVs (e.g., Chevy Silverado/Sierra, Tahoe/Suburban, GMC Yukon/Yukon XL) with 4.8L/5.3L/6.0L/6.2L V8 engines - fitment confirmed through 2014; 2015-2025 coverage unconfirmed.

Features

Direct-fit OEM-style oxygen (O2) sensor, designed to match factory form, fit and function.

Specifications

Part Number: 21546
Sensor Type: Narrow-band O2 sensor (heated) with 4-wire connector.
Thread Size: M18-1.5 mm.
Wiring Harness Length: approx. 420 mm (16.5").

Included Components

1x NGK/NTK 21546 oxygen sensor (with integrated wiring and connector)
Installation instructions showing connector orientation and recommended torque

Product Description

The NGK/NTK 21546 OE replacement oxygen sensor offers a direct-fit solution for many GM trucks and SUVs built in the mid-2000s through the early 2010s. This sensor plays a key role in monitoring exhaust oxygen levels and providing accurate feedback to the engine's control system, enabling the proper air/fuel mixture and maintaining performance, economy and emissions compliance.

With its factory-matched design and quality heritage, the 21546 sensor simplifies installation: remove the old sensor, install the new at the same exhaust port, then allow the engine to complete its drive-cycle so that the ECM can relearn and adapt to the new input. Proper torque, connector engagement and clearance around the sensor are important to ensure reliable operation.

Although fitment is listed through 2014 for many vehicles, confirm compatibility for 2015 and newer models before purchasing - this listing uses the most recent verified information at time of printing.