I have a 2006 Trailblazer with a bad O2 Sensor. I am looking for advice on how to get the old sensor removed. It is the sensor on the exhaust manifold. I have borrowed a set of O2 sockets from Autozone, but I am only rounding off the edges of the sensor. I have tried warming up the engine and heating the area with a propane torch, and spraying a lot of PB blaster on it, but I still can't get it loose. I tried removing the heat shield, but those nuts are really rusted on, and I expect I will snap the bolts if I try to remove them. I would appreciate any tips.
Sunday, October 2nd, 2011 AT 1:02 PM