Home » Oxygen Sensor Upstream Lambda O2 Front Probe for GMC Sierra

Oxygen Sensor Upstream Lambda O2 Front Probe for GMC Sierra

SKU: 1005012108472332-Default Title
Default Title
€36,36
-38% €58,18 €36,36

Main Description

Meet the Oxygen Sensor Upstream Lambda O2 Front Probe—a precise, drop‑in replacement designed for GMC Sierra and a wide range of GM vehicles. This upstream oxygen sensor helps monitor the air–fuel ratio, delivering accurate lambda readings to your engine computer. By ensuring the proper oxygen sensor data, it supports efficient combustion, steadier idle, and better overall emissions performance.

Built to fit a variety of GM models, including GMC, Chevrolet, Cadillac, and Yukon/Yukon XL series, this sensor aligns with OEM specifications for reliable, long‑lasting operation. It’s a direct replacement for the upstream/front sensor position and is compatible with engines such as 5.3L V8, 4.3L V6, and 6.2L V8 across multiple years.

With a compact, robust design from IWOKPHD, this part is crafted to withstand the rigors of daily driving, helping your vehicle maintain optimal fuel economy and performance while staying within emissions guidelines.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

At intercyprus.com since 2002 — trusted for quality and reliability.

Benefits & Tips

  • Direct upstream/front O2 sensor replacement for GMC Sierra 1500 (2014–2016) with 5.3L V8, 4.3L V6, or 6.2L V8 engines, plus compatible GM models listed in the fitment details.
  • Supports correct air–fuel ratio readings to improve engine performance, throttle response, and emissions performance.
  • Install in the upstream position as specified for most models; note that a few listed variants use Upstream Left on certain Yukon/Yukon XL configurations.

Product Specifications

  • Brand: IWOKPHD
  • Sensor Type: Piezoelectric
  • Position: Upstream (Front); some variants listed as Upstream Left for certain models
  • OEM No.: 12659516
  • Part Numbers: 234-4940, 2344940, 234 4940, 12659516
  • Origin: Mainland China
  • Measuring Range: Upstream Lambda O2 Oxygen Sensor (specific range data not provided)
  • Compatibility/Fitment (selected vehicles):
    • GMC Sierra 1500 (2014–2016) 5.3L V8 — Upstream
    • GMC Sierra 1500 (2014–2016) 4.3L V6 — Upstream
    • GMC Sierra 1500 (2014–2016) 6.2L V8 — Upstream
    • Cadillac Escalade (2015–2017) 6.2L V8 — Upstream
    • Cadillac Escalade ESV (2015–2017) 6.2L V8 — Upstream
    • Chevrolet Silverado 1500 (2014–2016) 6.2L V8 — Upstream
    • Chevrolet Silverado 1500 (2014–2016) 5.3L V8 — Upstream
    • Chevrolet Silverado 1500 (2014–2016) 4.3L V6 — Upstream
    • Chevrolet Suburban (2015) 5.3L V8 — Upstream
    • Chevrolet Suburban (2016) 5.3L V8 — Upstream
    • Chevrolet Tahoe (2015–2016) 5.3L V8 — Upstream
    • GMC Yukon (2015) 5.3L V8 — Upstream
    • GMC Yukon (2015) 6.2L V8 — Upstream
    • GMC Yukon (2016) 5.3L V8 — Upstream
    • GMC Yukon (2016) 6.2L V8 FLEX — Upstream Left
    • GMC Yukon XL (2015) 5.3L V8 — Upstream
    • GMC Yukon XL (2015) 6.2L V8 — Upstream
    • GMC Yukon XL (2016) 5.3L V8 — Upstream
    • GMC Yukon XL (2016) 6.2L V8 FLEX — Upstream Left

Package Includes

  • 1 x Oxygen Sensor Upstream Lambda O2 Front Probe

Warnings / Reminders

Please verify compatibility with your exact year/model before purchase. If you are unsure, contact support for confirmation. Professional installation is recommended to ensure proper fitment and electrical connection.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Providing quality and trusted service since 2002 at intercyprus.com