Code/Service Bulletin Help.
Here are a couple of threads where I found this information:
https://ls1tech.com/forums/pcm-diagnostics-tuning/881614-ses-light-code-help-i-have-code.html
https://ls1tech.com/forums/general-lsx-automobile-discussion/868977-code-420-cats-questions-options.html
https://ls1tech.com/forums/pcm-diagnostics-tuning/683184-code-p0420.html
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I've also gotten a lot of good factory info at www.mygmlink.com, definitely worth looking at, I have some good printouts from them here in my files.
I've also gotten a lot of good factory info at www.mygmlink.com, definitely worth looking at, I have some good printouts from them here in my files.
thanks! - if the warranty extension covers v6 cars or just LS1 cars
- if it covers just the original owner or mileage on car regardless of number of owners.
I had already removed my cats so I didn't pay much attention to the letter...but I'm sure I still have it. I'll try to find it tonight.
Yes it does. The LS1 just has 2 rather than 1.
I got the letter for my '01 V-6 which I traded in for the WS6. I didn't have mine fixed because right about the time it was just starting to throw the code I saw the WS6 I have now and the next day I turned the light off and traded. My bad. Stealership's problem after that.






