ABS Computer Module Replacement

Easy step by step replacement guide for changing an ABS computer control module, configuration may vary but follow the same steps, this article pertains to many GM ABS brake system vehicles.

Difficulty Scale: 4 of 10

Tools and Supplies Needed

  • Replacement ABS Brake Control Module Assembly
  • Socket set including torx
  • Screw driver set
  • Shop towels
  • Protective eye wear and gloves
Begin by placing your car on level ground with the emergency brake set and remove the battery cable from the negative side of the battery.

Step 1 - Locate and identify the ABS brake computer module which is usually under the hood or mounted to the frame rail under the vehicle, disconnect all electrical connectors.

Disconnecting Electrical Connectors
Step 2 - Next, remove all ABS controller mounting screws, these bolts may or may not be torx head bolts.

Removing ABS Computer Controller Mounting Bolts
Step 3 - Once all mounting bolts have been removed gently remove the controller by lifting it straight up from the ABS valve assembly.

Removing ABS Computer Control Module
Step 4 - After the old module has been removed, match the old module to the new replacement unit, they should be an identical match.

New ABS Computer Control Module
Step 5 - Next, install the new unit, be sure to clean the mounting surfaces to ensure proper installation.

Installing New ABS Computer Control Module
Step 6 - After the module is securely in place, reinstall the mounting bolts and tighten in an "X" pattern.

Mounting Bolt Tighten Pattern
Step 7 - Once all the mounting bolts are tight, reconnect the remaining wiring connectors and recheck system operation.


Reconnecting Electrical Connectors

Helpful Information

The ABS controller is responsible for limiting the brake line pressure which allows a tire or tires that has locked up to start rotating under sever braking conditions which helps keep the vehicle under control. If the controller fails it can cause the ABS system to stop working and illuminate the ABS brake warning light. Most ABS diagnostic systems can be access by the ALDL connector much like the body or engine control system. Use a trouble code reader with ABS code capability to read such codes.

Common Problems

  • If the vehicle is equipped with a traction control system it uses a different ABS computer which are not interchangeable with non-traction controlled vehicles.
Best Practices

  • Always use quality ABS replacement parts.
If further assistance is needed, our certified technicians are ready to answer car repair questions for free.

Related Information

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ABS Computer Replacement