Funny, the summer blend gives my Yukon a hard start issue. But the winter blend seems to tap the valves a bit more at start up. That could also be the oil being thicker in colder temps too. Not enough to worry about.

 

Curious what the OP ended up doing? I still have pinging with my Superchips regardless of the tune and the "one shot" tunes I am getting from SC don't seem to be resolving the issue. At this point, I am considering getting rid of the flashpaq all together and trying a different tuner.

 

In the end I kept it. I did an update that eliminated most of the pinging. I currently run yow tune with no pinging. After looking at the alternative I decided superchip was still the best way to go.

 

Thanks for the update, even with tow tune the pinging is not completely gone. I put mine back to stock tune this morning to see if there is some other issue going on.