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.
1999 Cadillac Seville STSFACTORY OEM SERVICE PROCEDURE
Body Control Modules
- Description
- Component Locations
- Programming
- Self-Diagnostic System
- System Tests
- Diagnostic Tests
- DTC B0530: Fuel Level Sensor Stuck
- DTC B0532: Fuel Level Sensor Shorted To Ground Or Open
- DTC B0533: Fuel Sensor Feedback Shorted High
- DTC B1007: EEPROM Write Error
- DTC B1009: EEPROM Checksum Error
- DTC B1310: Outside (Ambient) Air Temperature Sensor Failure
- DTC B1317: In-Car Air Temperature Sensor
- DTC B1318: Driver's Side Solar Sensor
- DTC B1321: A/C Low Side Temperature Sensor
- DTC B1324: A/C Refrigerant OVERPRESSURE
- DTC B1327: Battery/Source Voltage Low
- DTC B1328: Battery/Source Voltage High
- DTC B1329: Passenger's Side Solar Sensor
- DTC B1330: Left A/C Temperature Sensor
- DTC B1331: Right A/C Temperature Sensor
- DTC B1332: Left Heater Temperature Sensor
- DTC B1333: Right Heater Temperature Sensor
- DTC B1340: Driver's Side Air Mix Actuator Feedback
- DTC B1341: Passenger's Side Air Mix Actuator Feedback
- DTC B1343: Air Inlet Door Movement Fault
- DTC B1344: HTR/Def/Ac Door Movement Fault
- DTC B1390: Battery Voltage Sensor Failure
- DTC B1399: Loss Of KDD Main Control Head
- DTC B1652: Loss Of Keep Alive Memory (KAM)
- DTC B1656: EEPROM Write Error
- DTC B1658: EEPROM Checksum Error
- DTC B1805: Ignition Switch Problem
- DTC B1982: Source/Battery Voltage High
- DTC B1983: Source/Battery Voltage Low
- DTC B2419: Ambient Light Sensor Circuit Problem
- DTC B2420: Twilight Delay Pot Failure
- DTC B2422: Interior Light Rheostat Failure
- DTC B2510: Steering Wheel HVAC Control Switches Stuck
- DTC B2511: Steering Wheel Convenience Control Switches Stuck
- DTC B2512: Steering Wheel Controls Illegal A/D Values
- DTC U1016: Loss Of Communications With Pcm
- DTC U1040: Loss Of Communications With Abs
- DTC U1056: Loss Of Communications With RSS
- DTC U1064: Loss Of Communications With Dim
- DTC U1065: Loss Of Communications With IPM
- DTC U1066: Loss Of Communications With Rim
- DTC U1088: Loss Of Communications With SDM
- DTC U1096: Loss Of Communications With IPC
- DTC U1128: Loss Of Communications With IRC
- DTC U1129: Loss Of Communications With Amp
- DTC U1144: Loss Of Communications With PHN
- DTC U1160: Loss Of Communications With DDM
- DTC U1161: Loss Of Pass Door Module SBI
- DTC U1162: Loss Of Rear Driver Door Module SBI
- DTC U1163: Loss Of Rear Pass Door Module SBI
- DTC U1166: Loss Of Communications With SCM
- DTC U1170: Loss Of Driver Door Switch SBI
- DTC U1192: Loss Of Communications With VTD
- DTC U1255: Class 2 Serial Data Line Initialization Error
- DTC U1300: Class 2 Serial Data Line Shorted To Ground
- DTC U1301: Class 2 Serial Data Line Shorted To Voltage
- Removal & Installation
- Wiring Diagrams
Factory Service Tools
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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.