ECM flush I'm replacing the ECM in my 03 GMC but somebody has told me that it needs to be flush since the vehicle wouldn't start after i had replaced the ECM how do ido that?

Need a faster answer?
Having it flashed mean to have it reprogrammed for which you will need access to a GM factory scan tool your best bet is to bring it to a facility with the capability to perform the task.
Was this answer helpful?
Yes
No
Thank you for your feedback!