Hello,
I have recently had some problems with my 2001 Yukon, it a 5.3L and has 4x4. when I accelerate I get about 2000RPMs maybe and can barely get above 35mph I brought it to a local dealer for a diagnosis and was told I had a bad catalytic converter, four bad O2 sensors and bad injector connectors. I've replaced the injector connectors but its still acting up. I don't want to spend the 700-1000 on a new catalytic converter when I can just replace the sensors. Has anyone had this problem before????