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 Buick Roadmaster BaseFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS
| Component | Component Location |
|---|---|
| ABS System Module | In left side of engine compartment, on brake pressure modulator valve. |
| A/C-Heater Module | Behind center of dash. |
| Audio Alarm Module | On convenience center. |
| Automatic Headlamp Control Module | Behind right kick panel. |
| Automatic Transmission Control Module | Part of transmission, left rear. |
| Blower Motor Control Module | Behind right side of dash, near blower motor. |
| Cruise Control Module | On left front inner fender panel, near master cylinder. |
| Daytime Running Lamps (DRL) & Twilight Sentinel Module | Behind right kick panel. |
| Diagnostic Energy Reserve Module (DERM) | Behind left side of dash, above convenience center. |
| Driver Seat Adjuster Memory Module | Below center of driver's seat. |
| Electronic A/C Power Module | Behind right side of dash, near blower motor. |
| Keyless Entry Module | In luggage compartment, attached to rear shelf. |
| Power Steering Control Module | Behind left side of dash, near fuse block. |
| Powertrain Control Module (PCM) | On left front of engine compartment, under air cleaner. See Figure. |
| Powertrain Control Module (PCM) Ground | Front of left cylinder head. See Figure. |
| Theft Deterrent Module | Behind left side of dash, left of brake pedal bracket. |
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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