GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

Module(s)

B1480

DTC B1480 Battery Rundown Protection Circuit Malfunction

BCM

B2527

DTC B2527 Front Fog Lamp Circuit Low

BCM

B2577

DTC B2577 Headlamp Control Circuit Low

BCM

B2585

DTC B2585 Parklamp Control Circuit Malfunction

BCM

B2613

DTC B2613 Pass Compartment Dimming # 1 Circuit High

BCM

B2617

DTC B2617 Pass Compartment Dimming # 2 Circuit Low

BCM

B2618

DTC B2618 Pass Compartment Dimming # 2 Circuit High

BCM

B2642

DTC B2642 Delayed Exterior Lighting Control Circuit Low

BCM

B2643

DTC B2643 Delayed Exterior Lighting Control Circuit High

BCM

B2647

DTC B2647 Ambient Light Sensor Circuit Low

BCM

B2648

DTC B2648 Ambient Light Sensor Circuit High

BCM