Hi New to the forum and have searched for an answer to my question without success. I am putting back together an '08 H2 that was disassembled when I got it and I am now at the point of putting in the fuel tank and emissions. I have everything in place and have identified all but one line connection on the fuel pump, I believe it must be a vent but don't want to put the tank in until I am sure. There is a 3/8" fuel supply connection and a 1/2" Vent Line connection but off of the vent line connector there is another connector that looks like it must be a vent. I have been to the GM parts house but their drawings show a different pump and connections to what I have.

Has anyone replace a pump on a 2008 and is this a vent that has no connection? Appreciate any help.

Photo attached.