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 Impala SSFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | DEFINITION |
|---|---|
| DTC B1000 | ECU Malfunction |
| DTC B1007 | EPROM Read Write Error |
| DTC B1009 | EEPROM Checksum Mismatch |
| DTC B1339 | Device Power #3 Circuit Open |
| DTC B1349 | Device Gnd #1 (Chassis Gnd #1) CKT Open |
| DTC B1440 | Power Mode Master Input Circuits Mismatch |
| DTC B1507 or B1508 | High Power Control Circuit |
| DTC C0550 | Electronic Control Unit (ECU) Performance |
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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