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I’m having a problem. I need to change my bank one catalytic converter. Anyone do this on their Acadia give me any tips? I have a 2009. I see it fine but reaching everything is issue. Do I need to drop something?
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They should bolt that are welded to the exhaust manifold for the side closest to the engine so you only need to loosen the nut attached to it and simple bolts/nuts on the flange side of the cat furthest from the engine. Put her on a jack and get it done. I have a 2009 aswell and i had to take mine off to remove my power steering pump.

You'll have to loosen the entire front part of the exhaust though, so unbolt the bottom flange of bank 2 cat and you should have enough play to slide it out.
 
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