O2 sensor location on 09 enclave

Asked by DieselDad67 Jan 30, 2020 at 12:27 PM about the 2009 Buick Enclave CXL AWD

Question type: Maintenance & Repair

I have to replace the O2 sensor on my 09 enclave.
Does any one know where the upstream one is
located on the engine?

1 Answer

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