Dealer service?

[Danfrmmaine]

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 new fpcm before I do that? Truck will not start, will that affect the programming? Ideas? Thoughts? Thanks Dan in Maine

[mikel]

the truck will not start?

I would not suggest doing anything with the tuner for now, figure out why it wont start first.

ALso going to need to know if the dealer flashed the pcm while it was there. Ideally the stock tune should have been restored before the dealer trip.

[Danfrmmaine]

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