O2 sensor voltage looks a little funky. Can you graph it?

 

Yes sir, I will and get back with you on this post.

 

I'm just a shade tree mechanic too...
O2 stuck out to me but RPM looks a bit low too. I also don't ever remember seeing exactly 0 for throttle position. Might want to graph that too while moving the throttle. Does it show the idle air control?

Edit: according to this I'm wrong on the RPM.
https://www.tahoeyukonforum.com/thre...dle-rpm.29465/

 

I should add... Your temps look fine.
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Which o2 sensor are you referring to. I replaced the bank 1 sensor 1 with oem.

 

Bank 2 sensor 1 is what I saw. For driveability just the first sensor matters. The second is for emissions.

 

sensor 1. Both banks

 

I just replaced the bank1 sensor 1 with a new AC Delco oem.

 

Ya'll got to remember now.I was sitting still on all if these screenshots. That's when I'm having the problem. Sitting at a light or stop sign. Otherwise it will run just fine

 

I know. You already said that. Maybe the sensor isn't the problem. Maybe the wiring is damaged or there's an exhaust leak. Who knows.
It still would helpful to see the graphs. Something doesn't look right to me.
We are diagnosing here, right? Not firing the parts gun and hoping for the best.