O2 Oxygen Sensor Upstream Downstream for GMC Yukon XL 2500 (2008-2013) 6.0L

Direct-Fit Replacement Oxygen Sensor Kit for 2008-2013 GMC Yukon XL 2500 (GMT931)

What it Does: The 4-piece oxygen sensor kit monitors pre- and post-catalytic exhaust gases on the 2008-2013 Yukon XL 2500 to restore precise closed-loop air-fuel metering and prevent catalytic converter fault codes.

The Stock GMC Yukon Sensor Degradation

High thermal cycles, rich cold starts, and sulfur contamination steadily degrade the factory zirconia sensing elements on heavy-duty GMT900 platform trucks. Over 100,000 miles of heavy towing, sluggish switching response times lead to delayed closed-loop fueling corrections. This deterioration causes excessive fuel trim divergence, compromised fuel economy, fouling of the catalytic substrate, and common check engine light codes including P0135, P0155, P0420, or P0430.

The Engineering Solution

This 4-piece direct-fit set matches upstream and downstream operating characteristics to ensure consistent voltage transitions between rich and lean states. Built with fast-activating internal ceramic heaters, high-grade planar sensor elements, and dual-layer protective stainless steel outer shielding, these sensors resist carbon fouling and thermal degradation. Factory-pinned weather-pack connectors ensure clean harness integration without splicing, guaranteeing correct signal resolution for the powertrain control module on high-load LY6 and L96 Vortec engines.

What's Included

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

Technical Specifications

Compatibility

• 2008-2013 GMC Yukon XL 2500 6.0L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT900 Yukon?

Yes, this is a direct fit for the 2008-2013 GMC Yukon XL 2500 equipped with the 6.0L Vortec engine. Does not fit 1500 models equipped with 5.3L or 6.2L engines.

Do these sensors require wire cutting or splicing during installation?

No, these sensors feature factory-style multi-pin connectors that plug directly into the original GM harness without modification.

The GMC Heavy-Duty Reliability Standard

Engineered for 3/4-ton heavy hauling and continuous thermal stress, this oxygen sensor set stabilizes air-fuel ratios to protect converter efficiency and maintain consistent torque under sustained towing loads.