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Diagnostic Code Index

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX

DTC Description
DTC B1000  Electronic Control Unit (ECU) Performance
DTC B1001  Option Configuration Error
DTC B1004  Electronic Control Unit Identification Circuit
DTC B1007  EEPROM Read/Write Error
DTC B1009  EEPROM Checksum Mismatch
DTC B1013  Calibration Read Only Memory (ROM) Checksum Error
DTC B1370  Device Ignition 1 (ON and START) Circuit
DTC B1380  Device Ignition ACCESSORY Circuit
DTC B1385  Device Ignition START Circuit
DTC B1390  Device Voltage Reference Input Circuit
DTC B1420  Device Voltage
DTC B1428  Ignition-Switched Power Relay Circuit
DTC B1433  Ignition-Switched Power Relay 2 Circuit
DTC B1475  Retained Accessory Power Circuit
DTC C0550  Electronic Control Unit (ECU) Performance
DTC P2535  Ignition One Voltage High
DTC U1000 and U1255 
  • DTC U1000 Class 2 Data Link Malfunction
  • DTC U1255 Lost Communications
DTC U1001-U1254  DTC U1XXX Lost communication With XXX Module (See Table In DTC Testing
DTC U1300, U1301 or U1305 
  • DTC U1300 Class 2 Data Link Low
  • DTC U1301 Class 2 Data Link High
  • DTC U1305 Class 2 Data Link Low or High