Enjoy the videos informative and entertaining. 
My 2000 Chevy Silverado 4X4 4.8 L is not passing the Blue Tooth Smog TEST.
Getting P0410 error code. Most FAQ's list the issue as: Fuse, Relay, Air Injector and check valves.
Fuse and Relays test good, Injector and check valves have been replaced, found a bad vacuum line and replaced.
Still fails Air Injector test with P0410. 
Also this test is slow to run, stays at pending status.
Not a daily driver, maybe 1k/ year and the mileage is 120K. Any recommendations?
Thank-you,
Perplexed Friend_fan 
Do you have a bidirectional scan tool to test the various components?
Here's a few other suggestions - though oriented to foreign cars the tech is the same:
https://eeuroparts.com/blog/p0410-code-meaning-causes-and-how-to-fix-it/
Air bypass solenoid, air diverter valve?
