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 Pontiac Grand Prix GTPFACTORY OEM SERVICE PROCEDURE
Body Control DTCS
BODY CONTROL DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | DEFINITION |
|---|---|
| DTC B1000 | BCM Malfunction |
| DTC B1001 | Option Configuration Error |
| DTC B1004 | KAM In Module Has Been Reset |
| DTC B1007 | EEPROM Module Mismatch |
| DTC B1009 | EEPROM Checksum Mismatch |
| DTC B1013 | EEPROM Checksum Mismatch |
| DTC B1370 | Ignition 1 Signal Is Shorted To Ground, Voltage Or Open |
| DTC B1380 | Ignition 3 Signal Is Shorted To Ground, Voltage Or Open |
| DTC B1385 | Crank Signal Is Shorted To Ground, Voltage Or Open |
| DTC B1390 | 2 Battery Positive Voltages Differ By 1 Volt Or Greater |
| DTC B1420 | Voltage Supplied To Body Control Module Is In Range Of 7-26 Volts |
| DTC B1428 | IGN 1 Relay Control Feed Circuit Open Or Short |
| DTC C0550 | Internal Write Or Checksum Malfunction |
| DTC P2535 | Ignition 1 Voltage Signal 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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