If driving the militech SUV doesn't progress the quest it might be best to send a ticket to CDPR support:
Welcome to CD PROJEKT RED Technical Support! Here you will find help regarding our games and services, as well as answers to frequently asked questions.
support.cdprojektred.com
You can try the suggestion from this article first. If that doesn't do anything, contact them by clicking on "contact us".
As for reloading save games, it's usually more effective to load a save game before the start of a quest or before getting the specific quest task.
Sometimes a certain order of actions can trigger a bug in a game, which is why loading a save game too close to the point where an issue occurs often doesn't change anything.