1991 Chevrolet Blazer 4x4 43 v6 got to 35MPH died like the key was turned off has not started since motor is still in time new coil wire and coil but no start anyone got any ideas where else to look?

Take the plastics off of your steering column, and right by the ignition, bottom side, there should be a small black box. Two inverted torx bolts holding it in place. That's your ignition switch. This can cause your vehicle to lose power, like it was turned off, even while driving. A new part, if I remember correctly is around a hundred bucks. It is kind of a pain to get to, but not the hardest job by far. Good luck!!