Wow, thanks to both of you. I mean it. I had no idea those other parts fit my car.

I will probably want to keep the DOD (although it doesn't seem to work as well as it should, my 2006 Silveradogot the same city MPG) for traveling, etc, unless I find out I'm only saving 1-2MPG highway with it ...

Monte:

I realize I'm getting ahead of myself, since I don't even own a Predator yet. My 2008 GXP and I are patiently waiting. Are you able to make a custom DOD tune that modifies when the engine switches from V8 to V4 (ie: any time the transmission is in 4th gear or Overdrive, or switches when the ...

Hi. Who is HP? I have a 2008 GXP. Any idea when something will be available for that? I was told it would be last month. I can't wait for it. Does Diablo need a test dummy for it?