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30-Minute Vehicle Key Relearn
Important: This procedure will only relearn the vehicle keys. This procedure will not learn the immobilizer prerelease password ***** the challenge/response data. Do not use this procedure as a substitute for a 10-minute relearn when replacing or reprogramming a body control module (BCM). Doing so will result in a failure to learn the fuel enable password.
This 30-minute learn procedure should be used when all vehicle keys are desired to be replaced or reprogrammed. This procedure will erase all previously learned vehicle keys from the BCM. Once the 30-minute learn procedure has been completed, any remaining vehicle keys may be programmed using the Adding Keys procedure to ensure their continued functionality.
Important: The BCM learns the key transponder information upon the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
yah but you had a new master key made correct?
a new GM transponder key is programed like this i know step 5 is phrased odd