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.
2004 GMC Jimmy 2D Utility, Part Time, AutomaticFACTORY 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
Use the Manual With the Right Hardware
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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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