Seller notes

Compatibility： Specification: *Direct Plug-In Replacement.*Warranty: 1 Year*Position:Upstream&Downstream*4 wire configuration Interchange Part Number: 234-4407 Note: Downstream location is between the catalytic converter and the tailpipe Upstream location is between the catalytic converter and the engine Package Include: 2*Upstream & 2*Downstream Oxygen Sensor Fitment: YearMakeModelEngine2003CHEVROLETEXPRESS 1500V6 (4.3L); V8 (5.3L)2003CHEVROLETEXPRESS 2500V6 (4.3L); V8 (4.8L/5.3L/6.0L)2003CHE...

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