Circuit Description
WARNING: This page is about a different car, the 2003 Chevrolet SSR. However, it is still accessible from the selected car via links, so may be relevant.
Each control module runs a program that tests its ability to write to the electrically erasable programmable read-only memory (EEPROM). No external circuits are involved. The module writes information to a data block in the EEPROM. The module then reads the data and compares it to what was sent to the data block. If the data does not match after 3 consecutive attempts, that control module may set DTC B1007.