OK, here's a question: You have a 16K calibration going into a 64K EEPROM. There are 4 16K offsets to choose from (0000, 4000, 8000, C000). GM uses the 4000 offset. If you use another offset, will the computer look for the first 16K block that is not empty? Reason I ask is I noticed an EEPROM from another tuner is using the C000 offset rather than the 4000 offset.