I had a 1997 Bravada and had this happen 3 times. Twice it was the ignition switch and once the fuel pump. They display the same symptoms. Based n your surge I believe it will be the ignition switch as excess fuel is temporarily burned as the ignition switch reconnects. The first time my ignition switch went bad it simply would not start (it would crank). The second time it went bad (30k miles later) It died two or 3 times at stop signs, then died at 70mph on the interstate (I was able to restart it before coming to a complete stop and kept driving) only to have it die for good on the freeway going through downtown St Louis. 1 year later simular symptoms occurred and I replaced the ignition switch again- only to discover this time it was the fuel pump. Replacing the ignition switch is fairly easy in a 1996, the part cost about $120 at NAPA. Be careful not to break the emergency flasher while removing the plastic, as it breaks easily and will require a new turn signal assembly if broken (as I broke mine).