o2 sensor

Looking for advice, I have a 06 Colorado with the 2.8l rwd. I need to replace the bank 1 sensor 1 O2 sensor. Also my catalytic converter (from the manifold) has separated from the lower weld. I am really hoping to use this as an advantage and gut the cat while it is already exposed then just...

I recently purchased a 2010 Colorado with a 3.7L. The mileage on the odometer is not correct as the mileage reported on the title when it was purchased by the previous owner 2 years ago is only 36 miles less than what the actual mileage on the odometer now. I do a lot of traveling so I want to...

Well after waiting about 158,000 miles for the valves to fail I finally got to work on my '04 3.5 5MT that we bought new. After a Valve job, pre-cat delete, Supermod 89 oct tune, Supersparkz, Supermod ported throttle body & air filter box inlet upgrade it seemed to be almost perfect but...

I know it is possible to have an O2 sensor start to go bad and affect gas mileage, but not be bad enough to throw a code. My question is how common is this (I have 70K miles on the truck), and does one of the O2 sensors seem to go bad before the other? Does one of the O2 sensors have a...