GM Service Manual Online
For 1990-2009 cars only

DTC

Description

B1397

DTC B1397 Device Voltage Reference Out #1 CKT Low

B1398

DTC B1398 Device Voltage Reference Out #1 CKT High

B1477

DTC B1477 Retained Accessory Power Circuit Low

B1478

DTC B1478 Retained Accessory Power Circuit High

B1480

DTC B1480 Battery Rundown Protection Circuit Malf

B2577

DTC B2577 Headlamp Control Circuit Low

B2585

DTC B2585 Parklamp Control Circuit Malfunction

B2600

DTC B2600 Daytime Running Lamp Circuit Malfunction

B2613

DTC B2613 Dim Potentiometer Circuit High

B2617

DTC B2617 Courtesy Lamp Circuit Low

B2618

DTC B2618 Courtesy Lamp Circuit High

B2647

DTC B2647 Ambient Light Sensor Circuit Low

B2648

DTC B2648 Ambient Light Sensor Circuit High

B2752

DTC B2752 Horn Relay Coil Circuit Low

B2961

DTC B2961 Key In Ignition Circuit Malfunction