Won't start because I installed "unflashed" pcm. Having it towed to dealer to flash pcm. Wondering if I should return to stock tune before towing Thanks

Hi. New here. I decided to change out fuel pump and fuel pump control module on 2007 sierra that was tuned with diablosport predator before I bought it. I've got the programmer. Now that I have to have the fpcm programmed at the dealer should I return truck to factory settings? Should I unplug the ...