P0420 code - Just took to dealer, Y Pipe failed

[Biggredd2069]

Have an 04 Yukon Denali. My check engine light came on recently. Have a couple of free dealer oil changes and took it in. I didn't have a full diagnostic done but they told me the Y pipe failed. Just wondering if that is something I can do on my own very easily to replace or if that's a tough job? also said I need a new oil pan gasket. I'm ready to trade it in soon but hard to do with a check engine light on.

 

[clandr1]

I think the Y pipe just involves unbolting the pipe, removing a couple of O2 sensors, and bolting it back on. The oil pan gasket is a little more involved, but not terrible.

 

[SLCHOE]

If you want to save money and only have one cat per bank, I'd look at having a shop weld in universal cats if you're just going to sell it anyway. The price difference of a couple welded in cats is about $400-$600. The cost of a factory y-pipe at a dealership is easily over $1000 just for the part and not including labor.