My 2016 Yukon with the L86 will backfire on the first start of the day after sitting overnight... more often than not. I'm not noticing any misfires, etc. It simply gives one single loud "pop/bang" out the tail pipe right at the end of the crank when the engine starts. That will be it until the next day.
I took a quick log of the crank/start this morning to see if anyone can see something that sticks out that I'm missing.
Truck is stock minus CAI, Corsa cat-back and the tune. New plugs, wires, etc. No codes or anything else being reported. I am running a flex sensor and currently sitting at ~E80. To my recall, it does it on 93 as well.
Initial-Morning-Crank_09172023.hplInitial-Morning-Crank_09172023.hpl
Thanks in advance.