bobcat5544

I would start with the wire harness. I believe gm does have a new connector to replace the old one. All you would need to do is cut the old one off and wire in the new one. If not then you could cut off both connectors and wire them together. If that does not fix the problem then check make sure the system does have power. If it does then check the load level sensors they may not be giving the control unit a signal.

Document ID# 1988903 2001 Chevrolet Tahoe - 4WD -------------------------------------------------------------------------------- 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) Models: 2004-2007 Buick Rainier 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 2002-2004 Oldsmobile Bravada -------------------------------------------------------------------------------- This bulletin is being revised to update model years. Please discard Corporate Bulletin Number 04-05-25-002C (Section 05 -- Brakes). -------------------------------------------------------------------------------- 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 Correction DO NOT REPLACE THE BRAKE MODULE. 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 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 Part Number Description 11588564 Bolt 15650962 Washer 15672934 Nut 12378398 (in Canada, 10952414) Rubberized Undercoating -- Paintable MIDSIZE SUVs Part Number Description 11517555 Bolt 15650961 Washer 11503749 Nut 12378398 (in Canada, 10952414) Rubberized Undercoating -- Paintable Warranty Information For vehicles repaired under warranty, use: Labor Operation Description Labor Time N9502 Ground Repair - EBCM Ground 0.2 hr