Not if ignition module . Electronic componets when heated up will act just like that . When it dies check spark, fuel pressure right away an find out what quit . Test don't guess . Videos on youtube on testing GM ignition system. Which engine does yours have ? Had option of two different ones . 3.4 an 3.8L . Ignition module or cranhshaft position sensor could be the cause .
Three dual tower ignition coils are mounted to the ICM, and are serviced individually. The ICM performs the following functions:
• The ICM supplies a power and low reference circuit to the CMP and CKP sensors.
• The ICM determines the correct direction of the crankshaft rotation, and cuts spark and fuel delivery to prevent damage from backfiring if reverse rotation is detected.
• The ICM determines the correct coil triggering sequence, based on how many 18 X ON-OFF pulses occur during a sync pulse. This coil sequencing occurs at start-up, and is remembered by the ICM. After the engine is running, the ICM will continue to trigger the coils without the CKP sync pulse.
• The ICM inputs 18 X and 3 X reference signals to the PCM.
• The 3 X reference signal is also known as the low resolution engine speed signal. This signal is generated by the ICM using an internal divide-by-six circuit. This circuit divides the 18 X signal pulses by 6. This divider circuit will not begin operation without a sync pulse present at start-up, and without 18 X and 3 X reference signals no fuel injection will occur.
Pull plug wires off same coil when it dies , crank the engine , is there spark ? Ignition Control Modules ICM by Wells featuring Sgt Tech