Well, if the other guy is driving my truck at the launch ramp, he is
using my truck. I'd hate to see that usage excluded.
It isn't under the truck policy. He is only excluded under the GL
umbrella policy, as he should.
He was never included under the GL umbrella policy. You were, and you will
be sued if someone in your vehicle kills someone. And the GL umbrella
coverage is not there for that.