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International Automotive Technicians Network
Re: GM Reprogramming Error E4399
Posted to Technical Discussion Forum on 1/27/2015

Hello,ran into the same error last week on a program for a rear suspension control module on a 07 [...] turns out that the software required to flash this module was not in the gm data base.I had to retrieve the old software info etc from the old module and gi... Login to read more.