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 Chevrolet ClassicFACTORY OEM SERVICE PROCEDURE
Lighting DTCS
LIGHTING DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B2532 | Front Foglamp Relay Out Short to Ground/Open |
| DTC B2533 | Front Foglamp Relay Output Short to Battery |
| DTC B2558 | Interior Lamp Control Output Short to Battery |
| DTC B2575 | Headlamp Request/Feedback Mismatch |
| DTC B2577 | Headlamp Control Circuit Low |
| DTC B2578 | Headlamp Relay Output Short to Battery |
| DTC B2585 | Parklamp Control Circuit Malfunction |
| DTC B2587 | Parklamp Relay Output Short to Ground/Op |
| DTC B2588 | Parklamp Relay Output Short to Battery |
| DTC B2600 | DRL Error |
| DTC B2601 | Daytime Running Lamp Control Circuit Range/Performance |
| DTC B2602 | DRL Relay Output Short to Ground/Open |
| DTC B2603 | DRL Relay Output Short to Battery |
| DTC B2647 | Ambient Light Sensor Circuit Low |
| DTC B2648 | Ambient Light Sensor Circuit High |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.