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po740,po758,po785,po7453 all these codes have come up at one time. what to do?

Vehicle: 03 chevy s-10,4.3 ltr ,v-6, 4wd i have replaced catalitic converter 3 times already .anyways lost of power has me suspecting cloged cat. again. service engine soon light come on last night and engine performance went away. also the 10 amp fuse #11 for the cluster keeps blowing
asked Jul 5, 2012 by anonymous

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