Performance Oxygen Sensor. The O2 Oxygen Sensor; Upstream monitors exhaust gases before they reach the catalytic converter, providing critical feedback to the engine control unit. This sensor helps optimize fuel mixture for improved engine efficiency, emissions reduction, and overall performance.

Construction and Appearance. Manufactured using premium materials with an isostatic pressing process for enhanced strength, the sensor features a double-layered 310S stainless steel body for corrosion resistance and durability. It has a heated narrow-band thimble design with a square male connector and a wire harness length of 13.62 inches, finished in an industrial metallic texture.

Installation. Installation is straightforward and requires no drilling, with a specialized 22 mm O2 sensor socket recommended for removal and tightening. This part fits specifically and directly without any modifications, ensuring ease of replacement.

Warranty. Backed by a limited lifetime warranty covering manufacturing defects under intended use.

Application. This sensor fits the 07-10 6.0L Sierra 2500 HD as an upstream O2 sensor; users should verify compatibility for their specific model generation and emission specifications.

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