fuel pump relay

[whiplash]

Hello everyone! Brand new to this forum, and I have a couple of questions. First off, where is the fuel pump relay on my 2005 Sierra 6.0? I have not had a chance to pick up a service manual yet, so I apologize in advance. Also, has anyone here installed a MSD fuel pump booster? I looked at the MSD tech forum, and they claim it will not work on my truck, but the guy I got mine from was running one with no problems, however I am too far away to see the install and he did not do it himself. Any help is greatly appreciated!!

[GM-Tech]

It's in the UBEC (Underhood fuse box). The lid is labeled so you can easily find out which one it is.

 

I have no clue what an MSD fuel pump booster is.