07' Upgrades

Stroker07 · #1 Tue, July 27th, 2010, 02:19 PM

I have an 07' PSD and I was wondering what is the best upgrade to start with. I've been reading here where the FICM reprogramming is a must. I've also heard that the Gryphon is a must. What do you all think is the best place to start. I tow a heavy (12,000+lbs) toy hauler most of the time with this truck and would like to see better power and fuel mileage. What do the experts here at PHP suggest?

Thanks in advance,
SB