GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Engage the park brake.
  2. Observe the park brake pump motor.

Does the park brake pump motor continue to run?

--

Go to Park Brake Pump Motor Runs Continuously

Go to Step 2

2

Perform the Park Brake Pressure Sensor Circuit Check test. Park Brake Pressure Sensor Circuit Check .

Is the pressure sensor circuit OK?

--

Go to Step 3

Go to Step 4

3

Replace park brake pump assembly. Refer to Park Brake Pump Replacement .

Is the repair complete?

--

System OK

--

4

Repair park brake pressure sensor circuit. Refer to Park Brake Pressure Sensor Replacement .

Is the repair complete?

--

System OK

--