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.
2003 Cadillac Seville SLSFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B1000 | Internal Fault |
| DTC B1004 | Running Check Sum Error |
| DTC B1007 | EEPROM Error |
| DTC B1009 | EEPROM Error |
| DTC B1390 | Two Battery Positive Voltages Differ |
| DTC B1556 | 3 Redundant Copies Of The Vehicle Odometer Mileage Within The EEPROM Do Not Agree |
| DTC B1652 | Running Check Sum Error |
| DTC B1656 | EEPROM Error |
| DTC B1658 | EEPROM Error |
| DTC B1805 | Monitored Ignition Switch Circuits Is Open Or Shorted |
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.