Quote Originally Posted by BillBoost37 View Post
Please do not use Bosch plugs or O2's in your GM product. For some reason they have issues much more often than other brands. Denso is a great O2 and last I checked.. Rockauto had them for $35.
I've never heard of bosch problems, they're probably the best aftermarket for o2 sensors that I know of. I wouldn't buy their plugs though. Is denso the oem brand?