Catalytic Converters

[jr2966]

Hello!

I recently bought a 2004 Denali XL 60. L and I'm getting post cat codes after I replaced the sensor with a OE 02 sensor. It must have a faulty cat on the RHS. Does GM warranty this part and for how long. I haven't looked at the raw sinnal yet just cleared the codes and the P 0161 is back. Does anyone have the same problem? The truck has 100k on it. JR

[jrrod2004]

If memory serves me correctly it is 8/80 (8 years/ 80,000 miles). Whichever comes first. you are completely out of any applicable warranties with 100K on the odometer