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 Cadillac XLRFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Antenna Module | Right rear of roof. See Figure . |
| Blower Motor Control Processor | Right side of blower motor. See Figure . |
| Body Control Module (BCM) | Behind right side of dash. See Figure . |
| Distance Sensing Control Module | Center front of engine compartment. See Figure . |
| Driver Door Module (DDM) | In driver's door. See Figure . |
| EBCM-BPMV | Center of engine compartment. See Figure . |
| Electronic Brake Control Module (EBCM) | Left front of engine compartment. See Figure . |
| Electronic Suspension Control Module | Left rear of luggage compartment. See Figure . |
| Engine Control Module (ECM) | Behind lower right front fender. See Figure . |
| Engine Control Module (ECM) Connector | Lower right rear of engine compartment. See Figure . |
| Folding Top Module | In center of luggage compartment. See Figure . |
| Front Passenger Door Module (FPDM) | In front door. See Figure . |
| Fuel Pump Control Module | Right rear of vehicle. See Figure . |
| HVAC Control Module | At center of dash. See Figure . |
| Ignition Coil/Module 1 | Right front of engine. See Figure . |
| Ignition Coil/Module 2 | Top left front of engine. See Figure . |
| Ignition Coil/Module 3 | Top right of engine. See Figure . |
| Ignition Coil/Module 4 | Top left front of engine. See Figure . |
| Ignition Coil/Module 5 | Right top of engine. See Figure . |
| Ignition Coil/Module 6 | Top left rear of engine. See Figure . |
| Ignition Coil/Module 7 | Top right rear of engine. See Figure . |
| Ignition Coil/Module 8 | Top left rear of engine. See Figure . |
| Inflatable Restraint I/P Module | Right side of dash. See Figure . |
| Inflatable Restraint Sensing & Diagnostic Module (SDM) | Center of dash. See Figure . |
| Inflatable Restraint Sensing & Diagnostic Module (SDM) | Located underneath vehicle console. See Figure . |
| Inflatable Restraint Side Impact Module-Left | Right side of driver's seat back. See Figure . |
| Inflatable Restraint Side Impact Module-Right | Right side of passenger's seat. See Figure . |
| Inflatable Restraint Steering Wheel Module | Center of steering wheel. See Figure . |
| Memory Seat Module | Under driver's seat. See Figure . |
| Remote Control Door Lock Receiver (RCDLR) | Right side of dash. See Figure . |
| Steering Column Lock Control Module | Behind left side of dash. See Figure . |
| Transmission Control Module (TCM) | Behind lower right side of front fender. See Figure . |
| Transmission Control Module (TCM) Connector | Lower right rear of engine compartment. See Figure . |
| Vehicle Communication Interface Module (VCIM) | At front of right wheelwell. See Figure . |
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.