It'll just die.  Might be hitting some washboards.  Cycle the key and it starts right back up.  Normally.  Today it died in the bean line at ADM.  Didn't think it was going to restart.  ECM has been replaced.  Fuel shutoff solenoid has been replaced.  It has done this ever since I've had the truck.  Might not do it again for 20k.  The ECM is wired hot to the batteries.  I just don't get it.  Even thinking about changing the key switch. Generally, when it dies, the check engine light comes on and it cuts out.  Today when I turned on the wipers the check engine buzzer came on for just a second but no lights.  I The circuit breaker panel looks O.K.  Grounds look O.K.  About ready to start pulling panels out of the dash and see what's back there.  Anybody had similar issues?