I've got a 2013 Silverado with 135k miles on it that just started jerking and feels like a dead miss while driving down the road. I've had it since it was new, never raw hided or miss treated it and have kept it serviced. My question is what can be the problem?

I pulled a code of P015B and P015D which pull up as bank 1 and 2 sensor 1. Could this be the cause of this problem?

First time I've had trouble out of this model. I've had older models with the same codes that never missed like this, they just preformed a little less and used more gas.

Thank you for the help in advanced.

I have never seen those codes before, but they are delayed responses from the O2 sensors....what is strange is this happening to both sides at the same time?

This is a dual cat setup, and the sensors affected are the ones before the cats...

This code can be caused by a bad sensor, bad cat, exhaust leak, etc...

Did this happen all at once?

I mean what are the odds, both sensors or cats go bad at the same time?

What I am wondering is, did one code set and you continued to drive it, and then the other one set? If this didn't happen then we are looking for one problem affecting both sides/banks at the same time....possible fuel delivery or vac leak or MAF problem?

Also, last complete tuneup? And these are the ONLY codes?

Last complete tune up was about 50k miles back, my check engine light popped on around 75k miles showing the O2 sensors but the shop I took it to showed they were still working so they reset it.
Those are the only 2 codes that popped up last night but I'm going to check it again this morning.

The last service 50,000 miles ago included spark plugs, right?

Yes, new plugs, wires, air filter and all

When it is acting up, shift the transmission down a gear and otherwise maintain speed. What happens?

I tried that and even put it in tow mode, I kept doing the same thing with everything I tried.

Does the tach needle move around with the "miss"?

It does, usually jumps about 500 RPM'* when it misses

Jumps 500RPM each time? Strikes me as transmission . . . ? An ignition miss or a injection miss wouldn't make the engine run up 500RPM each time it skips.