2004 Chevrolet S10 PickupFACTORY OEM SERVICE PROCEDURE

Lighting DTCS

LIGHTING DIAGNOSTIC TROUBLE CODE (DTC) LIST

DTC Description
DTC B1397 Device Voltage Reference Out #1 CKT Low
DTC B1398 Device Voltage Reference Out #1 CKT High
DTC B1480 Battery Rundown Protection Circuit Malf
DTC B2527 Front Fog Lamp Circuit Low
DTC B2537 Rear Foglamps Circuit Low
DTC B2577 Headlamp Control Circuit Low
DTC B2585 Parklamp Control Circuit Malfunction
DTC B2600 Daytime Running Lamp Circuit Malfunction
DTC B2613 Pass Compartment Dimming #1 Circuit High
DTC B2617 Pass Compartment Dimming #2 Circuit Low
DTC B2618 Pass Compartment Dimming #2 Circuit High
DTC B2647 Ambient Light Sensor Circuit Low
DTC B2648 Ambient Light Sensor Circuit High
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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