2007 Tahoe sudden P0300 P0154 P0352 P0354 P0356 P0358

[Roger08LTZ]

As Bank 1 went completely down, no fire at all. I don't see how I could have melted the honeycomb media. All 4 injectors were no doubt firing saturating it good. I broke down in a bad area, chose to escape rather than wait for a tow truck. I probably drove it 15 miles on 4 cylinders to get it home.

 

[Doubeleive]

the magnaflows are good, not sure what prices are right now but they were running about $600 when I did mine before covid.
you could try swapping 02 sensors from left to right just to confirm it's the cat.
or like Fless mentioned below, also run it a bit and clear the code and see if keeps coming back or not

 

[Fless]

I'd probably run it a few days and see if the code clears out. Might have some fuel in the pipes that needs to be gone.