2013 Express Crew Cab; recently upon cranking up there is a hiccup between firing and cranking, it's like the fuel line isn't primed. I usually some Sea Foam or other additive through regularly. Air filter is clean (K&N), plugs were changed around 6k ago [that sure was a blast], even ran Sea Foam through the vac lines within the last 10k. Thoughts? It runs like a champ, under WOT or cruising no issues and I am not seeing any codes. On my 03 I remember being able to turn to key to "On" 3or 4x and it'd display trouble codes...is there a similar technique on this one? Forgive me as I cannot remember the level of stereo/gauge cluster; I have the ability to see the speed in big numbers and scroll through multiple menus, set a different gauge in each of the 4 corners. Thanks for any help.

 

Coil packs?