Normally with a stock (as in electronics) LLY there should be no need to pull any fuses then lift your left leg and cross your fingers before you reflash.
We spent a fair amount of time on LLY's getting this right, I did not want people to be needing to pull fuses to get them to flash.
From what we hear things for the most part go smoothly on the LLY, the stubborn trucks also seem to exhibit the same programming issues with handhelds & TechII, it is almost like there is a build of trucks with a made in China BCM fitted!
Cheers,
Ross