a few mis-fires during drive cycle?

[seakone]

2011 Chevy Tahoe 5.3 4x4
I recently bought this vehicle 97k miles I went ahead and did new ac Delco spark plugs, intake manifold gasket, both exhaust manifold gaskets, both valve cover gaskets, all 4 oxygen sensors, ring gasket driver side exhaust to cat, donut gasket for passenger side exhaust to cat, both acDelco knock sensors, duralast mass airflow sensor from AutoZone, new map sensor as well. I did have vac and intake leaks so I decided to pretty much go in all those places and clean up all the dirt and stuff that I could, idles and rides much better I do not have anymore dtc's but I have my blue driver and when I do the mode 6 in the span of driving about an hour I check it and I do see misfires on current drive cycle on every cylinder 1-5 misfires each depending on current drive time, at idle sometimes I can feel the vibration from that sometimes I don't it's not enough to set a dtc but it is annoying since I know it's happening where could I start for diagnosing, I did switch spark plugs coil packs and wires and nothing changes still have misfires happening

 

[Foggy]

That's not really a number I'd be concerned with at all
Try running some Techron Concentrate thru a couple of tanks of fuel and
try some other brand and higher quality fuel.. Then check it out again

 

[OR VietVet]

Welcome to your first post on the forum.

I would do as recommended by @Foggy and can use Sea Foam as well.

 

[Fless]

I also wouldn't be concerned about that few misfires. If the cam or crank position sensor (either, or both) has been changed a crankshaft correlation procedure should be done with a bidirectional scan tool; doing that will sometimes correct mysterious misfires. If nothing else, have one done for peace of mind.

 

[seakone]

thanks all will try everything mentioned!