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Catalytic Converter Issue 2010 LaCrosse CXL

Rich B.

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Minot, ME
Buick Ownership
2016 LaCrosse & 2013 Boss 302 Mustang
Bank 1 should be in the front, has cylinder #1. See what I can find.

Have noticed also I stand corrected on O2 sensor locations from when I was doing a lot of my own car repairs. Never used to have them aft of converters but these days.... Wickpedia has a good history. Oxygen sensor - Wikipedia

Didn't mean to infringe on '07's post, think we were working on at same time, he has many good replies. image.jpeg
 
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