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Tahoe / Yukon Service Manual

Parking Brake Service Mode Selection

In order to perform repairs on certain parts of the brake system, it is necessary to fully retract the park brake caliper pistons. There are two ways to set the park brake into service mode. The preferred method is with a scan tool. With Scan Tool

  1. Install a scan tool.
  2. Ignition On/Vehicle in Service Mode with engine off.
  3. Select Brake System Control Module.
  4. Select Control Functions.
  1. Select Activate Rear Park Brake Service Position. Without Scan Tool
  2. Ignition On/Vehicle in Service Mode with engine off.
  3. Release the electronic park brake.
  4. Apply the service brake pedal.
  5. Push and hold the electronic park brake switch.
  6. After 15 seconds, the electronic park brake lamp will begin flashing.
  7. Release the electronic park brake switch.
  8. Within 5 seconds perform the following 7.1. Release the service brake. 7.2. Push and release the electronic park brake switch. Exiting Service Mode The park brake can be taken out of service mode with either of the following methods: With Scan Tool With a scan tool, select Deactivate Rear Park Brake Service Position. Without Scan Tool
  9. Apply the service brake pedal.
  10. For Push/Pull electronic park brake switch proceed to step 3. For Push/Push electronic park brake switch proceed to step 4.
  11. Pull and hold the park brake switch until the electronic park brake lamp stops flashing.
  12. Push and hold the park brake switch until the electronic park brake lamp stops flashing.