where is the downstream o2 sensor on a trailblazer plugged in at

Asked by May 13, 2015 at 04:44 PM about the 2003 Chevrolet TrailBlazer LT

Question type: Maintenance & Repair

I can not see it or feel it

1 Answer

96,895

It is aft of the catalyst about an inch or so, the harness will go right through the floor on that side, sometimes they incorporate it with the transmission harness.

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