Time to time the truck doesn't turn over on first try, I have to keep the key over a tad longer then she fires up.

I had the dealer flash all the computer components not to long ago...
I did have a small bottle of Lucas Fuel Injector cleaner...
Injector issue?

After a fuel filter change same issue.

 

turn over or start? 06-newer are starter is controled by the ECM/TIPM and always has had a hesitation. sometimes more noticable because we get lazy with the key.

 

Ah, mine stumbles a little when it's cold, but smooths out in a second or two. I wouldn't worry about it unless it does not clear up at idle.

 

Being cali its been 44 a few times. I tried to get a video / sound clip of it but no luck... Which is a good thing id say haha.