O2 Oxygen Sensor Upstream Downstream for GMC Canyon (2015-2022) 2.5L

Direct-Fit O2 Oxygen Sensor Kit for 2015-2022 GMC Canyon (GMT31XX)

What it Does: This matched upstream and downstream oxygen sensor kit restores closed-loop air-fuel metering and catalyst monitoring on the 2015-2022 GMC Canyon (GMT31XX) with the LCV 2.5L engine.

The Stock GMC Canyon O2 Sensor Failure

Factory oxygen sensors on the GMT31XX Canyon equipped with the LCV 2.5L engine endure severe thermal cycling and exhaust contamination. Over time, carbon fouling, silicone poisoning, or internal heater burnout degrades the zirconia sensing cell, causing sluggish voltage switching. When response times slow or heater circuits open, the ECM logs codes like P0135, P0141, or P0171 and forces open-loop fueling during operation.

Common Symptoms of a Failing OEM O2 Sensor

• Check Engine Light & DTCs: Codes like P0135, P0141, or P0133 from open heaters or slow response.
• Rich Fuel Trim: Delayed switching causes over-fueling, rough idle, and poor fuel economy.
• Emissions Failure: Erratic downstream feedback prevents readiness monitors or triggers P0420 faults.

The Direct-Fit Zirconia O2 Sensor Solution

This matched 12643707, RE1687-247, and 234-4762 replacement kit uses rapid-light-off zirconia elements housed in corrosion-resistant stainless steel shells. Laser-welded bodies block exhaust gas intrusion, while factory-length harnesses and weatherproof OEM connectors plug directly into the LCV 2.5L loom without splicing. Replacing both upstream and downstream sensors simultaneously balances closed-loop fuel trims and restores accurate post-cat oxygen storage monitoring on the GMT31XX.

What's Included

• 1 Upstream Oxygen Sensor
• 1 Downstream Oxygen Sensor

Technical Specifications

Compatibility

• 2015-2022 GMC Canyon 2.5L (LCV)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT31XX Canyon?

Yes. This fits 2015-2022 GMC Canyon models with the LCV 2.5L engine. Excludes 3.6L V6 and 2.8L Duramax Diesel trims; confirm engine before ordering.

Will this clear P0135/P0141 codes, and are both sensors included?

Yes. Replacing both sensors resolves heater faults (P0135/P0141) and slow-response codes (P0133) once cleared, covering both upstream and downstream positions.

Is wiring splicing required for installation?

No. Both 12643707 and 234-4762 sensors feature direct OEM connectors and pre-coated threads for straightforward installation on a cool exhaust.

The GMC Heavy-Duty Standard

Engineered for sustained thermal durability and stable closed-loop fueling, these sensors keep your GMT31XX Canyon compliant and reliable during daily driving and towing.