there is this rattling noise under my 95 blazer and when I hit the gas it happens and i was told that it was the cataylic converter I don't know and the person who told me wasn't from a real expert just an alley mechanic. I was wondering if that was true and how long do I have to fix this problem. And how much do you think it would cost me to get it fixed. It's been going on for about 2weeks now.
Optional Information:
1995 Chevrolet blazer
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no one