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Discussion Starter · #1 ·
Hi all, I am a recent owner of 2006 chevy trailblazer ss and have a 0420 code. Need to pass emissions and local mechanic is telling me I need new set of catalytic converters and over $2500 quote. Any advice and can this be fixed by the 02 sensor?
 

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TrailblazerSS AWD
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Most people would tell you to just turn it off in the tune with HPtuners as stated above. That’s what I would do.

I assume you’re not worried about your actual vehicle emissions or else you wouldn’t be driving a TBSS lol. You could buy a set of headers with a catted Y-pipe and technically “fix” the issue too. You’ll have a brand new set of cats, they just wouldn’t be factory cats. And it’s be less than $2500 too
 

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Discussion Starter · #5 ·
Most people would tell you to just turn it off in the tune with HPtuners as stated above. That’s what I would do.

I assume you’re not worried about your actual vehicle emissions or else you wouldn’t be driving a TBSS lol. You could buy a set of headers with a catted Y-pipe and technically “fix” the issue too. You’ll have a brand new set of cats, they just wouldn’t be factory cats. And it’s be less than $2500 too
I just need to pass this emissions and if a real problem does exist can get that fixed later
 

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'07 3SS 2WD
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Yeah the light is on, arizona checks everything
Insure it as a collector car with Hagerty. No more emissions testing, and you can get 5 year tags.
 

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'07 3SS 2WD
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533 Posts
Looks like there are aftermarktet options.

 

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'07 3SS 2WD
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533 Posts
Let's say Hypothetically...a guy in PHX had a take off cat'd OE Y pipe, what would it be worth?
 
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