Diagnostic Information and Procedures: Notes

DTC	Description
DTC B1000	Electronic Control Unit (ECU) Performance
DTC B1004	Keep Alive Memory (KAM) Reset
DTC B1007	EEPROM Write Error
DTC B1009	EEPROM Checksum Mismatch
DTC B1397	Device Voltage Reference Output Circuit Low
DTC B1440	Power Mode Master Input Circuits Mismatch
DTC B1477	Retained Accessory Power Circuit Low
DTC U0101	Lost Communication With Transmission Control Module (TCM)
DTC U1000	Class 2 Data Link Malfunction
DTC U1001	class 2 serial data circuit monitor
DTC U1300, U1301, U1305 (5.3L)	Class 2 Data Link Low or High
DTC U1300, U1301, U1305 (4.2L)	Class 2 Data Link Low or High
DTC U2100	High Speed CAN Communication Bus
DTC U2105	Lost Communication With Engine Control Module (ECM)