p0606 code 04 Envoy 4.2 Liter

While driving this evening with the radio, headlights, front wipers, rear wiper, defrost and a spot light shining the car stalled as I coasted along a road.
Turned everything off and tried to start the engine without success at first, then it did start a couple of minutes later.
Went to Autozone - Good Guys there and a great service to read the codes, the read a P0606 code that translates to:
ECM processor error
Explanation:
ECM detected an internal fault
Probable Causes:
1.-Failed ECM

I've been looking around for this code and occurance but have not found anything concrete.

Can you help guide me?

Thanks!

On rare occasions, a SES light and a Reduced Engine Power Message may be experienced due a DTC P0606 DTC. This may be due to the software and calibration not being optimum for all driving conditions.If a Reduced Engine Power Message is not present right now and the P0606 is just a history DTC, reprogram the PCM with the latest calibrations.If the P0606 is resetting, perform the P0606 diagnosis.if reprogramming does not fix it,replace the ecm.

On rare occasions, a SES light and a Reduced Engine Power Message may be experienced due a DTC P0606 DTC. This may be due to the software and calibration not being optimum for all driving conditions.If a Reduced Engine Power Message is not present right now and the P0606 is just a history DTC, reprogram the PCM with the latest calibrations.If the P0606 is resetting, perform the P0606 diagnosis.if reprogramming does not fix it,replace the ecm.
brian 1, nicely done, on the money info.