O2 Oxygen Sensor Upstream Downstream for Chevrolet Colorado (2015-2016) 3.6L

Direct-Fit Upstream & Downstream Oxygen Sensor Kit for 2015-2016 Chevrolet Colorado (GMT 31XX)

What it Does: The 4-piece oxygen sensor kit monitors pre- and post-catalytic exhaust gas composition on the 2015-2016 Colorado to restore closed-loop fuel trim accuracy and resolve emissions-related check engine lights.

The Stock Chevrolet Colorado Sensor Degradation

The direct-injected 3.6L LFX V6 operates with tight air-fuel ratio thresholds. Over time, thermal cycling and exhaust deposits foul the factory zirconia sensing elements. When upstream sensors suffer from response lag or heater circuit failure (e.g., DTC P0135, P0155), the ECM relies on default fuel maps, skewing short- and long-term fuel trims (STFT/LTFT). Meanwhile, worn downstream sensors trigger false catalytic converter efficiency codes (P0420, P0430), leading to increased fuel consumption, elevated emissions, and rough idling under load.

The Engineering Solution

This 4-piece kit replaces both Bank 1 and Bank 2 upstream and downstream sensors as a matched service set. Built with laser-welded stainless steel bodies, high-temperature ceramic sensing cores, and fast-acting integrated heating elements, these units reach operating temperature rapidly to enable immediate closed-loop ECM metering. Factory-matched harness lengths and OE-pinned weatherproof connectors eliminate splicing, while pre-applied anti-seize simplifies thread engagement in tight exhaust locations.

What's Included

• 2x Upstream Oxygen Sensors
• 2x Downstream Oxygen Sensors

Technical Specifications

Compatibility

• 2015 Chevrolet Colorado 3.6L V6 (LT, WT, Z71)
• 2016 Chevrolet Colorado 3.6L V6 (LT, WT, Z71)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT 31XX Colorado?

Yes, this is a direct fit for the 2015-2016 Chevrolet Colorado equipped with the 3.6L LFX V6 engine. Does not fit 2.5L 4-cylinder or 2.8L Duramax diesel models.

Do I need to clear ECM adaptations after replacement?

Yes, executing a fuel trim reset or clearing DTCs with an OBD-II scan tool is recommended so the ECM immediately learns fresh lambda values.

The Chevrolet Truck Caliber

Midsize haulers demand reliable closed-loop fueling to sustain power band stability during heavy towing and grade climbing. Installing fresh oxygen sensors ensures the direct-injected V6 preserves steady throttle delivery and optimal fuel economy on and off the job site.