O2 Oxygen Sensor Upstream Downstream for Chevrolet Colorado (2015-2022) 2.5L

Direct-Fit Upstream & Downstream O2 Sensor Kit for 2015-2022 Chevrolet Colorado (GMT31XX)

What it Does: This matched upstream and downstream O2 sensor kit for the 2015-2022 Chevrolet Colorado (GMT31XX) LCV 2.5L monitors exhaust air-fuel ratios and catalyst efficiency for closed-loop ECM fueling.

The Stock Chevrolet Colorado Oxygen Sensor Failure

Factory oxygen sensors on the GMT31XX Colorado with the LCV 2.5L engine operate in extreme exhaust heat cycles that eventually degrade the zirconia element and fracture internal heater windings. Carbon fouling, oil vapor, and thermal shock slow lambda voltage switching, preventing timely closed-loop fuel trim adjustments. Once heater resistance spikes or signal response lags, the ECM logs codes like P0135, P0141, P0171, or P0420.

Common Symptoms of a Failing OEM Oxygen Sensor

• Check Engine Light / DTCs: Triggers P0135, P0141, or P0420 when heater circuits fail or switching slows.
• Excess Fuel Consumption: Lagging upstream feedback locks the ECM into rich open-loop fueling.
• Rough Idle & Hesitation: Corrupted fuel trims cause light-throttle stumble and failed emissions tests.

The Direct-Fit Dual-Sensor Solution

This matched kit pairs an upstream and downstream direct-fit sensor built with fast-acting planar zirconia ceramic elements and laser-welded stainless steel housings for superior thermal shock resistance. Protective double-layered sensor shields guard against soot buildup and exhaust condensation while maintaining accurate gas flow to the sensing tip. Factory-matched OEM connectors and precision-cut threads allow true plug-and-play installation without cutting, splicing, or adapting harnesses.

What's Included

• 1 Upstream Oxygen Sensor
• 1 Downstream Oxygen Sensor

Technical Specifications

Compatibility

• 2015-2022 Chevrolet Colorado (2.5L LCV — 2-Sensor Configuration; Confirm Engine Before Ordering)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT31XX Colorado?

Yes. Direct fit for 2015-2022 Chevrolet Colorado LCV 2.5L models. Excludes 3.6L V6, 2.8L diesel, and GMC Canyon or other GM 2.0L/2.5L applications; confirm engine before ordering.

Will this clear P0135 or P0141 codes?

Yes, if caused by sensor failure. Replacing both units restores heater resistance and switching speed to clear P0135, P0141, and P0171.

Are connectors included for direct installation?

Yes. Both sensors include OEM-style harnesses for plug-and-play mounting; inspect bung threads and torque to spec.

The Chevrolet Heavy-Duty Standard

Built for the thermal demands of work and highway driving in your GMT31XX Colorado, this kit restores accurate fueling and CEL-free LCV 2.5L operation.