I had to have a new cat.installed in May 2008. It died on me on a trip and the dealership said it was "clogged." This week I get a service engline light and am told the 02 sensors are bad. I had all 4 replaced and still have the light on. Could cat be going bad again? What is the warranty on a GM cat installed at a dealership? I am not feeling the love with my tahoe lately.

I had to have a new cat.installed in May 2008. It died on me on a trip and the dealership said it was "clogged." This week I get a service engline light and am told the 02 sensors are bad. I had all 4 replaced and still have the light on. Could cat be going bad again? What is the warranty on a GM cat installed at a dealership? I am not feeling the love with my tahoe lately.

whenever the cat converters fail there is a reason,,,did they correct this ???? or just install new parts at your expense..

you must give dtc numbers so that the forum members can aid you with this ...

He didn't give me the numbers. Originally, i was told it was clogged from age and needed to be replaced. (150,000 miles) This week i was told " cat readings were above threshold and it probably was the 02 sensors since they had never been replaced. He did not give me the error code numbers.

He didn't give me the numbers. Originally, i was told it was clogged from age and needed to be replaced. (150,000 miles) This week i was told " cat readings were above threshold and it probably was the 02 sensors since they had never been replaced. He did not give me the error code numbers.

part stores like auto zone etc have scanners,,,get dtc then report the findings..to the forum..


whenever a cat converter is replaced from clogging the idiot technician must find out why before new converters are installed...

had a guy that needed injector work,,car would not pass emission test...we told him do not replace the cat converter,,fix the injector.....well the NEW cat got so hot it burned the car up...