The following is an ABS control module repair guide on:
2000 to 2006 Chevy Suburban, Tahoe, Silverado, GMC Yukon and Cadillac
(antilock brake skid) controller or computer is responsible for limiting the
brake line pressure which allows a wheel or wheels that have locked
up to start rotating under severe braking conditions which helps keep the vehicle
under control in a hard braking or skid event. Every vehicle equipped with an
this system has a computer module controller that can go bad as parts
sometimes do which casus the ABS warning light to be on.
Please follow this video and article to determine if your module has failed
by process of elimination.
ABS Warning Light On Repair
Watch the video below then continue with the guide to gain additional tips
and updated information
Begin Repair Guide
Most ABS diagnostic codes can be access by the ALDL connector much
like the engine control system, but this takes a specialized code scanner with the
capability to read such codes. 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.
When this module fails it can do so in a few different ways one of the
most common problems is the control relay that is built into the unit to fail either
by not closing which delivers electrical power to the computer circuitry, or the
relay will not disengage which leaves the unit on even with the ignition key
off, which will
drain the battery down.
This relay is internal inside the controller, but I have heard of people
opening them up and just replacing the relay though it takes some soldering on
the circuit board. If you do not feel comfortable doing this simply get a
replacement factory replacement you can get them from Amazon for about $190.00.
The dealer or repair garage will charge about $450 to $550 for the same job
(parts and labor).
The unit can fail because one of the control valve activation coils has
burned out which leaves only three out of the four wheels to be controlled hence
the light being on. The computer control module appearances may vary, but
follow the same steps. This article pertains to many Chevy trucks and SUV's, this
particular repair was done on a Chevy Tahoe.Before we begin, you will need to locate the module which is usually under
the vehicle or in the engine compartment. If it's not located in the engine
compartment it will be under the vehicle on the frame rail on the driver’s side,
this location is used mostly on trucks and SUV's. If it is in this location you
will need a jack to lift up the vehicle to get to it.
Replacing the module is not too difficult and should take you about an hour,
are you ready to change your own part and save some cash?
Begin the repair by parking your vehicle on level ground with the transmission
in park and the emergency brake set. Remove the battery cable from the negative
terminal of the battery. Lets get started!
Tools and supplies
you will need:
brake control module assembly
Socket set including Torx bits
Screw driver set
Protective eye wear and gloves
Once the module is located and with negative battery cable disconnected,
release the electrical connectors from the unit by pushing the connector’s safety using a small screwdriver. One
connector will be for the main power and ground for the unit while the opposing
connector will be sensor inputs and data bus wiring to the main ECM computer that controls the warning light itself.
The weather packing can
make it a little difficult to remove sometimes so wiggle the connectors as you
gently pull on them to remove.