Latest GM OTA update failed and truck won’t start

[damabo]

Tried to download the latest GM software update and got about halfway through and it stopped. All electronics would turn on but truck would not start. Tried disconnecting the neg battery terminal to reset the computer and still no start.

Towed to dealer. Sat for a week before they would look at it and the battery was dead. Once they charge the battery and tried to force download the software update. They had the same symptoms of walking up halfway through.
They believe that the range DFM disabler module that I installed, possibly caused a short to the ECM and killed the ECM. They are gonna replace the ECM under warranty. Or at least that’s the direction they’re going.
Curious, if anybody else is running the range DFM module in it have downloaded the latest software update. And experience similar problems.

 

[AXE]

Tried to download the latest GM software update and got about halfway through and it stopped. All electronics would turn on but truck would not start. Tried disconnecting the neg battery terminal to reset the computer and still no start.

Towed to dealer. Sat for a week before they would look at it and the battery was dead. Once they charge the battery and tried to force download the software update. They had the same symptoms of walking up halfway through.
They believe that the range DFM disabler module that I installed, possibly caused a short to the ECM and killed the ECM. They are gonna replace the ECM under warranty. Or at least that’s the direction they’re going.
Curious, if anybody else is running the range DFM module in it have downloaded the latest software update. And experience similar problems.

I'm running two of them and they have been tonthe dealer for updates and recently had an OTA update with no problems.

GM has many poor quality electronics. I'd believe their shit was broken before the Range caused problems.

My wife's Tahoe had a dead ass battery one morning and multiple codes thrown. I charged the battery up and no more problems. I chalked it up to failed OTA and dealer could not find any other issues and tested the battery per GM protocol twice.

 

[MrScottly]

They believe

The good ol' days of "We know" are gone, replaced by the best educated guess from techs that can't keep up on training for all the new "tech" crap on these vehicles.