Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003S10 PICKUP 2D PICKUP, 2.2 H, AUTOMATICREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXLIGHTING DTCS
2003 Chevrolet S10 Pickup 2D Pickup, 2.2 H, Automatic
Lighting DTCS
2003 Chevrolet S10 Pickup 2D Pickup, 2.2 H, AutomaticSECTION Lighting DTCS
LIGHTING DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B1397 | 5 Volt Reference Output Circuit Voltage Low |
| DTC B1398 | 5 Volt Reference Output Circuit Voltage High |
| DTC B1480 | Inadvertent Power Relay Control Circuit |
| DTC B2527 | Front Fog Lamp Switch Signal Circuit Is Shorted To Ground |
| DTC B2537 | Rear Fog Lamp Switch Signal Circuit Is Shorted To Ground |
| DTC B2577 | Headlamp Relay Coil Supply Voltage Circuit Shorted To Ground |
| DTC B2585 | Short To Ground In Interior Park Lamps Fused Supply Voltage Circuit Or An Open In Park Lamp Relay Control Circuit |
| DTC B2600 | Dimmer Switch High Beam Signal Circuit |
| DTC B2613 | Voltage 2 Circuit Is Shorted To Battery Voltage |
| DTC B2617 | Courtesy Lamp Relay Coil Control Circuit Is Open Or Shorted To Ground |
| DTC B2618 | Courtesy Lamp Relay Coil Control Circuit Is Shorted To Battery Voltage |
| DTC B2647 | Ambient Light Sensor Input Voltage Voltage Low, Or Courtesy Lamp Relay Coil Control Circuit Open Or Shorted To Ground |
| DTC B2648 | Ambient Light Sensor Input Voltage High, Or Courtesy Lamp Relay Coil Control Circuit Shorted To Battery |
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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.