Error codes and updates

[diamondventura]

After updating the ECMs on my 2019 Acadia, i suddenly got hit with a "service suspension" warning. Plugged in the scanner and found codes C0575, C0580, C0585 and C0590 on the suspension control module, plus a U0421 code on the BCM. Not sure if the update triggered it or if something else is going on. Has anyone else run into this after an update?

 

[familyhauler1022]

Sometimes, ECM updates can lead to problems with how the suspension module communicates. If you see codes like C0575, C0580, C0585, or C0590, those usually point to issues with sensors or actuators. Meanwhile, a U0421 code indicates there's a communication loss with the BCM. You might want to start by clearing the codes, then cycle the ignition, or go through the suspension module relearn procedure.