VU SS ute fuel pump replacement

[bladerunnerkim]

Hi guys,
bought a replacement fuel pump/sender unit(GMH) for my VU SS ute, has LS1 motor and have been trying to put it in but it doesnt seem to want to sit back flat so I can get the circlip back in place. It has spring type motion but wont go down any lower. Anyone else struck this problem before? Any ideas?? Cheers

[utes r us]

i have been trying to replace the the fuel pump sender unit in my vu ss after my own research and a lot parts guys know FA and stuffing me around twice, vu ss II has a specific pump sender unit, the others seem to be higher/longer ,, bet you have the wrong one???