In the past week, my truck died five times while travelling at highway speeds. The speedo/tach goes to zero, but I'm going 45-55 MPH. The truck re-started after a few seconds on four of the five times. On that one occurance that it didn't re-start, the THEFT light triggered and I had to cycle the ignition to get it to start again.
Just removed my Superchip to see if that was causing the problem. Chip had been installed for over three years. Anyone experience this kind of problem?