2019 Enclave BULLETIN 18-NA-379

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JKBuicks

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My Enclave Miles (1799) hit me with a engine light as I had started it up in my 50 deg garage. Had to tow it to the dealership. They told me it was a code P2731 with a BULLETIN 18-NA-379 reprogram tcm with updated calibration and preform fast learn following procedure test drive ok. What does this mean? Thank you for your time
 

MelsRegal

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P2731 refers the transmission control solenoid.
18-NA-379 is
#18-NA-379 - 1st Gear or Reverse Only with No Upshift, Vehicle wont Go Above 25 mph, 1-2 Shifts Feels Like a Momentary Tie Up, Malfunction Indicator Lamp (MIL) Illuminated - DTC P2731 Set - (Jan 2, 2019)

They reprogrammed the computer module that controls your transmission shifting.
 
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JKBuicks

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P2731 refers the transmission control solenoid.
18-NA-379 is
#18-NA-379 - 1st Gear or Reverse Only with No Upshift, Vehicle wont Go Above 25 mph, 1-2 Shifts Feels Like a Momentary Tie Up, Malfunction Indicator Lamp (MIL) Illuminated - DTC P2731 Set - (Jan 2, 2019)

They reprogrammed the computer module that controls your transmission shifting.
Thank you MelsRegal, what would cause the need to reprogram it with less than 2000 miles? If you don't mind answering. Is this a generic bulletin?
 
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