There's sticker on radiator support on my truck saying "original fuel system has been modified" or something along those lines.
So does that mean that I have in-tank fuel pump?

 

If you don't see your fuel pump in-between your filter housing and starter...yup....

 

why sad face, is it such a bad thing?

 

Well, as long as your pressure is ok, you're ok. But if that pump takes a dump, you have to pull the tank .

There are a million threads that describe all of the thoughts about that. Have fun with search... It's your best friend in here...

 

I went online and seller states that 05+ AirDog Raptor comes with the fuel upgrade module that goes in the tank and replaces the in-tank pump. it has a new float and plugs into the existing wiring harness and everything.

Can anyone confirm this?

 

That is incorrect, the Airdog comes with a kit to modify YOUR existing module in the tank it does NOT come with a new module canister.

 

hi just wanted to see if i could post. thanks