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TrailblazerSS
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Discussion Starter · #1 ·
07 ss. Bought it and within 200 miles the cat converter goes bad. The dealership replaced it with magnate direct fits. Two days later get codes for bank 1 o2 sensor downstream and misfirs. Back to dealership replaced 02 and cleaned injectors th and mag. Checked all connections and then walla no ceo. Drove fine for a day. Now getting codes for p0430and p 0420. Again clogged cats. Back to dealership rechecked everything. Ceo went away ss running great. Put it on the highway now its having all the original driving symptoms it had at first. Smells bad of gas. Misfiring again. Pulled over on highway to check things over. I could touch the cats and exhaust with bare hands and hold it no heat whatsoever. I'm stuck any help? Please
 

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TrailblazerSS
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Discussion Starter · #2 ·
Sorry for the missed words I'm typing from my new phone. It's magnaflow cats. Cleaned tb and maf. And cel
 

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'07 awd
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How many miles are on the TBSS?. If under 80,000, the cats should have been replaced with originals, for free.
 
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