How do I fix the C0265 ABS Code?

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by cbe295, Oct 10, 2013.

  1. cbe295

    cbe295 New Member

    In my 2001 Suburban I have a C0265 code which is Electronic Brake Control Module Relay Circuit. What can I do to fix it? Both my ABS light and Park Brake light are on because of it. Since my suburban has the auto 4wd system it will not going into 4wd, so I need to get it fixed. Thanks

    99'HEARTBEAT MODERATOR Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    The below Information should be able to help with DTC C0265

    G.M.Document ID# 1988903

    Subject: ABS Light On, DTCs
    C0265, C0201, U1041 Set and/or Loss of Communication with Brake Module (Reground EBCM Ground) #04-05-25-002D - (06/14/2007)

    2002-2006 Cadillac Escalade, Escalade EXT

    2003-2006 Cadillac Escalade ESV

    1999-2007 Chevrolet Silverado Classic

    2000-2006 Chevrolet Suburban, Tahoe

    2002-2006 Chevrolet Avalanche

    2002-2007 Chevrolet TrailBlazer, TrailBlazer EXT

    2003-2006 Chevolet SSR

    1999-2007 GMC Sierra Classic

    2000-2006 GMC Yukon, Yukon Denali, Yukon XL

    2002-2007 GMC Envoy, Envoy XL, Sierra Denali Classic

    2004-2005 GMC Envoy XUV

    Condition:...Some customers may comment that the ABS light is on. Upon further inspection, DTCs C0265 and C0201 may be set in the brake module. It is also possible for DTC U1041 to set in other modules. There may also be a loss of communication with the brake module.

    Cause....A Poor Connection at the EBCM ground is causing unnecessary replacements of Brake Modules.

    Important:....The EBCM Ground is different for each application. Refer to the list below for the proper ground reference:

    • Midsize Utilities = Ground 304

    • SSR = Ground 400

    • Fullsize Trucks and Utilities = Ground 110


    Perform the following steps to improve the connection of the EBCM Ground:
    ...Remove the EBCM Ground.
    ...The EBCM Ground is located on the frame beneath the driver's side door.
    ...If multiple grounds are found in this location, the EBCM ground can be identified as the heavy (12-gauge) wire.
    ...Clean the area, front and back, using a Whiz Wheel®.
    ...Install the ground, then the washer and then the bolt to the frame.

    Important:....It is important to use the bolts, washers and nuts specified in this bulletin. These parts have been identified due to their conductive finish.

    Install a washer and nut to the back side of the frame.
    Tighten the nut to 9 N·m (79 lb in).

    Cover the front and back side of the repair area using Rubberized Undercoating. An additional check can be made to ensure a good connection for the Battery Cable to Frame ground. It is possible for this ground to cause similar symptoms with the ABS as described above.

    Parts Information:....FULL-SIZE TRUCKS, SUVs AND H2

    Description.....Part Number#
    ***Rubberized Undercoating/Paint-able...#12378398
    Last edited: Oct 10, 2013
    1 person likes this.
  3. cbe295

    cbe295 New Member

    Ok. I will have to try it when I have free time. Thanks.
  4. bazar01

    bazar01 Rockstar 100 Posts

    The EBCM relay circuit is internal to the module. You have to pull the module and open it to access the printed circuit board where the relays are soldered. The solder joints have cracked and need to be reflowed.

    Reflowing the solder joints fixed my ABS problem.
    I cleaned all the ground points under the truck and it did not help.

    You can try cleaning first the ground points as they are very easy to do.

    Here is what I did to fix the same problem in my 2001 Suburban.

    Here is the video.
  5. ChevyFan

    ChevyFan The Sheriff Staff Member 5+ Years 1000 Posts

    Nice. Video and all. Thanks.

    Sent from my SAMSUNG-SGH-I317 using Tapatalk
  6. esteban77

    esteban77 New Member

    I have code c0265 on a 2002 gmc envoy, I replaced the computer before reading stuff online... and that didn't fix my problem... so I tryed the ground wire trick next and it didn't work... so know I don't know what to try next, any ideas?
  7. Favian

    Favian New Member

    -hey I know it's been a while since you posted this up but what did u end up doing to your vehicle to fix the problem

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