I've got an 89 silverado k1500 and recently died on me while I was slowing to a stop sign. It would not start. I replaced the ICM within the distributor and it fired right up. A couple weeks later, the same thing happened. Replaced the ICM again and it fired back up. A third time this happened and this time the ICM did not fix the problem. I've also replaced the distributor cap and the coil but still am not getting a spark. I noticed also that this time the fuel injectors are no longer spraying fuel. I've checked all related fuses and made sure the fuel pump was in fact working. I've not tried to replace the map sensor, yet. I didn't know if that would matter. Does anyone know a problem that would cause both the ignition and the fuel delivery to cease. The ECU is the only thing I could think of but that's kindof a pricy guess. Any suggestions would be appreciated.