1997 Geo Metro BaseFACTORY OEM SERVICE PROCEDURE

Control Units

CONTROL UNITS

Component Component Location
Audio Alarm Module Behind dash, left of steering column.
Daytime Running Lamps (DRL) Module Behind left side of dash.
Diode Module Behind center of dash, taped to harness.
Electronic Brake Control Module (EBCM) Behind left side of dash.
Ignition Control Module (Igniter) (1.0L VIN 6) Left side of firewall. See Figure.
Ignition Control Module (Igniter) (1.3L VIN 9) Left side of firewall. See Figure.
Power Door Lock Control Module Behind left side of dash.
Powertrain Control Module (PCM) (1.0L VIN 6) Behind right side of dash. See Figure.
Powertrain Control Module (PCM) (1.3L VIN 9) Behind right side of dash. See Figure.
Sensing & Diagnostic Module (SDM) Behind center console.
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.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.