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Originally Posted by yall
Oops I forgo to mentkion it is a 95 Blazero, with nothing fancy about it. Jus the norm.
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Can't say for sure if it's the o2 sensors or not, but it's highly likely as that's the codes it throwing.
Your description above sounds like a plugged or faulty EGR valve.
The sensors themselves aren't too expensive, ~$20.00 each,and probably not a bad idea to replace them if they're original.
The EGR valve is quite expensive, ~$150.00, but you may be able to get by with a good cleaning of that.