An Impala SS that I had to tune needed to have a bung added for the wideband (it was easier than trying to access the factory O2 sensors for removal). Long story short, the bung ended up destroying the threads on my NTK sensor when all was said and done. I'm pretty sure there's not enough left to salvage the threads with a chaser.
Having said that, I found that GM part number 12581687 is a cross reference for the NTK 24302 sensor, and it's significantly cheaper from GMPartsDirect.com than it is to buy an "NTK" sensor elsewhere. Has anybody confirmed that it's the same sensor?