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.
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HOMESERVICE MANUALSCADILLAC1996SEVILLE STSREPAIR AND DIAGNOSISBODY & FRAMEBODY, CAB CONTROL SYSTEMSBODY CONTROL MODULE
1996 Cadillac Seville STS
Body Control Module
1996 Cadillac Seville STSSECTION Body Control Module
- Description & Operation
- Self-Diagnostic System
- Diagnostic Parameters
- Diagnosing & Repairing BCM DTCS
- Notes
- DTC PZ1552, Loss Of PZM Keep Alive Memory (KAM)
- DTC PZ1556, PZM EEPROM Write Error
- DTC PZ1558, PZM EEPROM Checksum Error
- DTC PZ1970, Exterior Light Power Fault
- DTC PZ1971, Inadvertent Power Fault
- DTC PZ1972, Low Power Control Fault
- DTC PZ1973, High Power Control Fault
- DTC PZ1981, Battery Voltage Too Low
- DTC PZ1982, Battery Voltage Too High
- DTC PZ2016, Loss Of Serial Communications - Pcm
- DTC PZ2042, Loss Of Serial Communications - Abs/TCS
- DTC PZ2056, Loss Of Serial Communications - RSS
- DTC PZ2088, Loss Of Serial Communications - Sir
- DTC PZ2096, Loss Of Serial Communications - IPC
- DTC PZ2128, Loss Of Serial Communications - IRC
- DTC PZ2152, Loss Of Serial Communications - HVAC Programmer
- DTC PZ2153, Loss Of Serial Communications - CCP
- DTC PZ2255, Generic Loss Of Serial Data (Source Id Unknown)
- DTC PZ2470, Daytime Running Lights Fault
- DTC PZ2471, Interior Lights Fault
- DTC PZ2472, Low Beam Output Fault
- DTC PZ2473, High Beam Output Fault
- DTC PZ2476, Parking Lights Output Fault
- DTC PZ2550, Storage Mode Entered
- DTC PZ2719, UTD - Trunk Tamper Switch Fault
- Removal & Installation
- Wiring Diagram
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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.