o2 sensor [post catylitic converter] for a 2001 truck

2001 CHEVROLET IMPALA
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SILVERADO
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i have a code [po160 post cat.] that comes up. i replaced the sensor and the code came back. i then replaced the catylitic converter and the code came back again. the truck has 94000 miles with a 5.3 liter. i'm out of anwsers, does anyone have a suggestion?
Jan 8, 2006 at 8:38 AM
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2CARPRO JACK
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did you put a OBD2 compliant cat on it?
Jan 11, 2006 at 3:45 PM
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SILVERADO
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i am not sure if it was obd2 compliant. i asked the owner of a local muffler shop if it would work on that year of truck. he did say it was an universal type, which was a concern of mine. i will call him and find out what brand or make it is and do some more research on the type he put in. thanks again for the reply.
Jan 12, 2006 at 8:12 PM
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