Also posted this on FB. For reference on the fuel pump, this is the release tool and the repair kit you'd need. The crimp tool is listed as well on the website. It's a Delphi connector. https://www.corsa-technic.com/item.php?item_id=376 https://www.corsa-technic.com/item.php?item_id=311 This is the crimp tool. https://www.corsa-technic.com/item.php?item_id=695
If you're having issues with the fuel pump and/or errors related to it, this would be the kit to replace the connector.