Error $0331 when flashing CM2450B (CMF) controllers

[battey914]

Hi Guys, I went to repair a truck that was stock and not running after a flash from a company. The Fix to this is to turn on the ignition. Then pull fuses 49 and 51 Under the hood. Your radio and the instrument cluster will turn off, Then hit the license button if you have not already, and then the full flash button. Then the flash will go thru just fine. IF you licensed the ecm previously then you do not have to hit the license button again. This will work if the computer is in bootmode from a failed flash and if it is talking and letting the truck run.

After the flash is complete, you can then put the fuses back into the fuse block.

Also, make sure your SGM bypass cable is plugged into one of the green connectors under the driver side kick panel area. Sometimes you have to try a few different open slots to get it to work too i have seen.

Confirmed that pulling fuses 49 and 51 seem to quiet the bus and let the ecm complete a flash without error

Sent from my SM-S908U using Tapatalk

[CPS-Mike]

Confirmed that pulling fuses 49 and 51 seem to quiet the bus and let the ecm complete a flash without error

Sent from my SM-S908U using Tapatalk

Confirmed x2