I jus bought 03 trailblazer 400 off a guy. He blowed the head gasket on it so he installed a new one. But it wouldn’t start. So I got it an discovered water pump gasket had leaked an I suppose it leaked all the water out that’s why the head gasket blowed. So I fix that now I can’t get spark at all. I did get spark a few times but it not at all now. Now it’s leaking oil down inside the crank rope. So I’m lost I need help. An if anybody has a Manuel I can download id greatly appreciate it.