I have a 2009 GMC Acadia that’s currently dead. It died the other day while driving. The high pressure pump is fine and the fuel pump is fine. The fuel pump control module isn’t getting correct voltage. It’s only getting 4v at the pins. I just recently installed a new control module and fuel pump and when I did that the plug was getting 12v. Now the car won’t start unless I hot wire the fuel pump to build pressure then it’ll start and die once pressures gone. Anyone have any ideas? I’ve checked the plug under the spare tire it’s fine as well. The pins are also reading 4v.