Please HELP!

[avguy]

It would be unusual for a cat to go so soon, and typically it takes a good deal of raw gas to trash it kaput. Did you ever have a bad misfire that went on for an extended period of time? If not, the usual choice is to either hang on a new upstream O2 sensor, or (better yet) remove and test it. Replacement is an easy DIY, if you're up for that. For testing it, you would need to find the test specs for the factory sensor, which I have not seen in print, and is probably only found in the FSM.

[ch3mw4r]

It would be unusual for a cat to go so soon, and typically it takes a good deal of raw gas to trash it kaput. Did you ever have a bad misfire that went on for an extended period of time? If not, the usual choice is to either hang on a new upstream O2 sensor, or (better yet) remove and test it. Replacement is an easy DIY, if you're up for that. For testing it, you would need to find the test specs for the factory sensor, which I have not seen in print, and is probably only found in the FSM.

This was the only CEL I've had on it, I've never had a misfire code, at least in the 7 mos I've had it. What does testing the O2 sensor take to do? I've got a bit of equipment and my appointment at the Chevy dealer is a 2 p.m. tomorrow.