How many O2 sensors are on this vehicle?

Tiny
STEVE620
  • MEMBER
  • 2007 GMC ENVOY
  • 4.2L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 110,469 MILES
Tried looking for the one downstream and I couldn't find it unless it was hidden.
Thanks.
Monday, December 27th, 2021 AT 7:44 AM

1 Reply

Tiny
AL514
  • MECHANIC
  • 4,688 POSTS
Hello, this vehicle has two oxygen sensors, the rear one is behind the Catalytic Converter. Below is a picture of its location to the right side of the transmission.

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor
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Monday, December 27th, 2021 AT 9:05 AM

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