O2 Oxygen Sensor Upstream Downstream for Chevrolet Tahoe (2008-2014) 4.8L, 5.3L, 6.0L, 6.2L

Direct-Fit 4-Piece Oxygen Sensor Kit for 2008-2014 Chevrolet Tahoe (GMT900)

What it Does: The 4-piece upstream and downstream oxygen sensor kit restores closed-loop air-fuel metering accuracy and catalyst efficiency monitoring on the 2008-2014 Chevrolet Tahoe to eliminate DTCs and improve fuel economy.

The Stock Chevrolet Tahoe Sensor Degradation & Thermal Fatigue

Factory zirconia O2 sensors on GMT900 platform SUVs degrade over time due to severe exhaust thermal cycling, oil vapor blow-by, and fuel additive contamination. As the internal ceramic electrolyte element coats with carbon deposits and aging internal heater circuits slow down, sensor response latency increases. This sluggish closed-loop feedback forces the ECM to default to rich fuel trims, leading to poor fuel economy, rough idle, fouled spark plugs, premature catalytic converter failure, and diagnostic trouble codes such as P0135, P0141, P0420, or P0430.

The Engineering Solution

This 4-sensor replacement set restores factory signal latency and target lambda monitoring across both exhaust banks on Gen IV Vortec V8 engines. Featuring high-grade planar ceramic sensing elements shielded by double-laser-welded stainless steel housings, these sensors resist thermal shock and mechanical vibration. Factory-terminated weather-pack harness connectors and high-temperature PTFE wire lead insulation guarantee direct plug-and-play installation without wire splicing, matching OEM cross-references including 234-4668 and 234-4254.

What's Included

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

Technical Specifications

Compatibility

• 2008-2014 Chevrolet Tahoe 4.8L V8
• 2008-2014 Chevrolet Tahoe 5.3L V8
• 2008-2014 Chevrolet Tahoe 6.0L V8
• 2008-2014 Chevrolet Tahoe 6.2L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT900 Tahoe?

Yes, this is a direct fit for the 2008-2014 Chevrolet Tahoe equipped with the Gen IV Vortec 4.8L, 5.3L, 6.0L, and 6.2L V8 engines.

Do these sensors require wire splicing or ECU calibration?

No, these sensors feature factory-style harness connectors for direct plug-and-play installation, though clearing stored ECM trouble codes and fuel trim tables via OBD-II scanner is recommended after installation.

The Chevrolet Heavy-Duty Towing Caliber

Full-size GM utility platforms endure sustained heavy-load operating temperatures during towing and hauling; maintaining accurate closed-loop stoichiometry prevents catalyst overheating and preserves peak powertrain torque under severe service conditions.