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.
1996 Cadillac Seville STSFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DTCS
| OEM Code | Description |
|---|---|
| PZ1552 | LOSS OF PZM KEEP ALIVE MEMORY (KAM) |
| PZ1556 | PZM EEPROM WRITE ERROR |
| PZ1558 | PZM EEPROM CHECKSUM ERROR |
| PZ1970 | EXTERIOR LIGHT POWER FAULT |
| PZ1971 | INADVERTENT POWER FAULT |
| PZ1972 | LOW POWER CONTROL FAULT |
| PZ1973 | HIGH POWER CONTROL FAULT |
| PZ1981 | BATTERY VOLTAGE TOO LOW |
| PZ1982 | BATTERY VOLTAGE TOO HIGH |
| PZ2016 | LOSS OF SERIAL COMMUNICATIONS - PCM |
| PZ2042 | LOSS OF SERIAL COMMUNICATIONS - ABS/TCS |
| PZ2056 | LOSS OF SERIAL COMMUNICATIONS - RSS |
| PZ2088 | LOSS OF SERIAL COMMUNICATIONS - SIR |
| PZ2096 | LOSS OF SERIAL COMMUNICATIONS - IPC |
| PZ2128 | LOSS OF SERIAL COMMUNICATIONS - IRC |
| PZ2152 | LOSS OF SERIAL COMMUNICATIONS - HVAC PROGRAMMER |
| PZ2153 | LOSS OF SERIAL COMMUNICATIONS - CCP |
| PZ2255 | GENERIC LOSS OF SERIAL DATA (SOURCE ID UNKNOWN) |
| PZ2470 | DAYTIME RUNNING LIGHTS FAULT |
| PZ2471 | INTERIOR LIGHTS FAULT |
| PZ2472 | LOW BEAM OUTPUT FAULT |
| PZ2473 | HIGH BEAM OUTPUT FAULT |
| PZ2476 | PARKING LIGHTS OUTPUT FAULT |
| PZ2550 | STORAGE MODE ENTERED |
| PZ2719 | UTD - TRUNK TAMPER SWITCH FAULT |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.