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Where is the oxygen sensor bank 1 2 located on a 2001 Chevrolet Silverado?

2001 Chevrolet Silverado O2 Sensor (upstream), left (location)

>Located downstream of the manifold catalytic converter. Use the following steps to aid you in locating the O2 sensor:

1. Find O2 sensor connector at rear fuel injection.

2. Sensor will be located directly behind the connector downstream.