I HAVE A CHEVROLET 2001 TAHOE AND HAVE NOT HAD ANY PROBLEMS WITH THE ABS IN THE LAST FIVE YEARS OF OWNING THIS VEHICLE. HAD A ABS MODULE PROBLEM SO HAD IT REBUILD. AFTER REBUILD I STARTED HAVING PROBLEMS WITH ABS AND BRAKE LIGHTS STAYING ON INTERMITTENLY. WAS TOLD TO CHANGE ABS SENORS SO I CHANGED ABS SENSORS , CHANGED BRAKES, TOPPED OFF BRAKE FULID AND STILL THE PROBLEM REMAINS. CHECKED CODES ON ABS DIGNOSTIC AND CODE READS O265 WHICH MEANS MODULE IS BAD. COULD THIS BE POSSIBLE AFTER A REBUILT MODULE ?? REBUILT ON MODULE TOOK CARE OF THE PUMP STAYING ON CONSTENTLY AFTER MODULE REBUILT BEGIN TO HAVING PROBLEMS WITH THE ABS AND BRAKE LIGHTS COMING ON. WILL SOMEBODY PLEASE HELP ME THIS IS DRIVING ME UP THE WALL SINCE I CAN NOT PASS THE CALIFORNIA SMOG TEST...

Hello,
There is a ground wire connected to the engine block. Look for it on the back passenger side of the engine towards the top. Remove it and clean the connection and the wire connector and replace. Sometimes they get real bad and throw the ABS light on. Sometimes a brake light out can throw the ABS light on.

• You said you rebuilt the ABS module, do you have a short in it you are missing? The bulletin for this originally suggested to replace the module and was corrected because the ground itself was the major offender.
• Try to reground the EBCM. The code 0265 says "loss of communication with the brake module" 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.