Conditions For Setting DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana Special, 2001 GMC Savana Camper Special, and 2001 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.

Calculated checksum is compared with checksum value stored in EEPROM. If 2 values are not equal, DTC B1007 will set.
Passlock(tm) module writes certain information onto EEPROM. If Passlock(tm) module is unable to write onto EEPROM, DTC B1007 will set.