problem is that engine dies after highway driving and then coming to a stop, it is a know problem and there is a recall on that, as mentioned before, majority of 95 LS develop this some time in their lives. just like suggested previously, contact the dealer and arrange an ECU swap, if i remember correctly that what has to be done.
make sure you dont agree to any "extra" services from the dealer:) since they are not going to be free:)