When my truck sits for over 12 hrs it takes it while for it to crank

Could be losing fuel pressure prime. If the car is under warranty bring it back to the dealer. If not then you will need to bring this in for a hands-on inspection. I suspect fueling issues but there are many variables here that require someone experienced to take a look. Also, I want to make sure we are on the same page. Cranking and turning over are the same thing. That refers to the starter turning or cranking the engine in an attempt to start. If it's doing that and not firing or starting right away then it could be fuel related. If it's not cranking or turning over at all then it could be a weak battery or starter issue. If you need a shop for this, use this link to find a shop near you. https://repairpal.com/repair-shops Alex