Hey all, Tryed to put a 02 pcm in today. service code ending 411.
I did the passkey relearn 4th time would not start. tried repeat but no security light.. Still wount start, Scan tool reads p1638 witch is not an optional code on a silverado. I did over here a guy say he pulled it out of a bravada? When I asked they said no its from a running 01 silverado. So im not sure if its not suposed to start cuz im missing a step, like getting it programed first? or just a bad pcm. Thanks for any help.