1994 Buick Roadmaster BaseFACTORY OEM SERVICE PROCEDURE

Control Units

CONTROL UNITS LOCATION

Component Location
ABS System Module Behind left side of dash, above convenience center.
A/C-Heater Module Behind center of dash.
Air Bag System
Inflator Module At center of steering wheel.
Resistor Module Behind left side of dash, above parking brake pedal.
Audio Alarm Module On convenience center.
Auto. Headlight Control Module Behind right kick panel.
Blower Motor Control Module Behind right side of dash, near blower motor.
Cruise Control Module On left rear of inner fender panel, near master cylinder.
Daytime Running Lights (DRL) & Twilight Sentinel Module Behind right kick panel.
Diagnostic Energy Reserve Module (DERM) Behind left side of dash, above convenience center.
Electronic A/C Power Module Behind right side of dash, near blower motor.
Keyless Entry Module In luggage compartment, attached to rear shelf.
Low Coolant Warning Module Behind right side of dash, below glove compartment.
Low Oil Warning Module Behind right side of dash, below glove compartment.
Power Seat Pneumatic Control Module Under passenger's side seat.
Power Steering Control Module Behind left side of dash, near fuse block. See Figure .
Powertrain Control Module (PCM) On left front of engine compartment, under air cleaner. See Figure .
Theft Deterrent Module Behind left side of dash left of brake pedal bracket. See Figure .
Vehicle Speed Sensor Module Behind left side of dash, on top of convenience center.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.