I can now wholeheartedly agree with your assessment on them being a PIA to change. I changed the back one between the motor and the firewall last weekend. My hand is still healing from the skin I left behind. All changed and working now anyway, so hopefully won't have to do that one again. Thanks ...

Thanks for the info, I appreciate the help.

Greetings. I'm new to this forum and already a big fan. I'm trying to find the locations of the O2 sensors on my "new" GXP. I have a P0135 code and am not sure of the location of the bank one, sensor one location. Any info would be greatly appreciated. Thanks.