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. Turn the ignition ON with the engine OFF.
3. Select Electronic Brake Control Module/Brake System Control Module.
4. Select Control Functions.
NOTE:

Do NOT apply any brake pressure during this step.

5. Select Rear Brake Caliper Piston Retract or Front Brake Caliper Piston Retract if available.

Without Scan Tool 

1. Turn the ignition ON with the engine OFF.
2. Press accelerator pedal halfway down.
3. Place the park brake switch in the release position and hold for 10 seconds. Release the park brake switch.
4. Within 5 seconds, place the park brake switch into the release position again.

Exiting Service Mode 

The park brake can be taken out of service mode with either of the following methods:

• With a scan tool, select Rear Brake Caliper Piston Extend or Front Brake Caliper Piston Extend if available.
• Place the park brake switch in the apply position.