my GMC Sierra T1XX (2019-Present) has a code C0265, what does it indicate?

Learn how to diagnose and fix C0265 ABS issue in GMC Sierra T1XX. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the ignition is off.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Repair Wiring

• Sub-steps:
  1. Remove the wheel to access the ABS wiring harness.
  2. Visually inspect the wiring for frays, breaks, or corrosion.
  3. If any damage is found, repair or replace the damaged sections of the wiring harness.
• Tools Required: Socket set, wire strippers/crimpers, electrical tape.

3. Check ABS Wheel Speed Sensors

• Sub-steps:
  1. Locate the ABS wheel speed sensors on each wheel hub.
  2. Disconnect the sensor connectors and clean them to ensure good contact.
  3. Test the sensors using a multimeter to check for proper resistance (consult manufacturer specifications for values).
  4. Replace any faulty sensors.
• Tools Required: Multimeter, socket set.

4. Inspect ABS Module

• Sub-steps:
  1. Locate the ABS module, typically found near the master cylinder.
  2. Check the module for any visible signs of damage or leaks.
  3. If necessary, disconnect the module and test its connections for continuity and proper voltage.
  4. Replace the ABS module if it fails the tests.
• Tools Required: Multimeter, socket set.

5. Reassemble and Test

• Sub-steps:
  1. Reconnect all components and ensure all connections are secure.
  2. Reconnect the battery.
  3. Clear the trouble codes using the OBD-II scanner.
  4. Conduct a test drive to verify the ABS system is functioning properly.
• Tools Required: OBD-II scanner.