"EGR DELETE" Instructions

I believe you will get a CEL code with blocking the flow or unplugging the valve. Two different codes, possibly. The system is expecting a certain air pressure in the manifold. That's the MAP sensor's job.
It would be easiest to put a thin metal 'gasket/plate' at the intake to 90° pipe. You can make quick with and without tests!
I doubt 'soot would build up in the cooler if there is no flow going through, right?

I was planning on using small brass wire rotary brushes in a drill to clean the very small EGR passages in the intake.
But alas, I came to a better solution!
Bail on the Gen 3 and buy a Gen 4.

I'm sill learning about that new EGR system but it sounds much better and does not require so much routing cleaning.
I bought a '19 Gen4 Eco in Dec '25 with 232k miles, for a song, and it's now at 252k mi. Yes, it's a work car! And it gets much better mpg than the Gen3. Doesn't seem to use oil and keeps it fairly clean between 5-7k mi changes.

Who needs a '10 Gen3 Level 5 with the Advanced Tech Package, but not the 17" wheels?