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?

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17 Jun, 2012

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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.
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