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.
2001 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Automatic Transmission Control (BTSI) | Center of console. |
| Blower Motor Control Module | In right side of HVAC module. |
| Body Control Module (BCM) | Behind left side of dash, left of steering column. |
| Cruise Control Module | Front of left strut tower. |
| Electronic Brake Control Module (EBCM) | At left side of engine compartment, near strut tower. |
| Ignition Control Module (ICM) (3.1L VIN M) | Top right side of engine. See Figure . |
| Ignition Control Module (ICM) (3.8L VIN K) | Top front of engine. |
| Ignition Control Module (ICM) (3.8L VIN 1) | Top front of engine. |
| Inflatable Restraint Sensing & Diagnostic Module (SDM) | Below carpet, under right front seat. |
| Powertrain Control Module (PCM) | Left front side of engine compartment, in air cleaner assembly. |
| Radio Antenna Module | On rear window header panel, above headliner. |
| Remote Control Door Lock Receiver (RCDLR) | Left side of dash, on right side of instrument cluster. |
| Seat Heater Control Module (2) | Below respective front seat. |
| Sun Roof Module (Express Open) | Center rear of sun roof. |
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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