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Park Brake System Diagnosis

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
Step Action Yes No
DEFINITION: This diagnostic table is designed to diagnose ONLY the components of the PARK brake system in order to determine if the PARK brake system is operating properly. You will be directed by the appropriate Symptom Table to go to other brake system diagnostic tables as appropriate.
1 Were you sent here from a Hydraulic Brake Symptom Table? Go to Step 3  Go to Step 2 
2 Were you sent here from a Park Brake Symptom Table? Go to Step 3  Go to Diagnostic Starting Point - Vehicle
3
  1. Raise and support the vehicle with the rear axle supported by jack stands. Refer to Lifting and Jacking the Vehicle .
  2. Shift the transmission into NEUTRAL.
  3. With the park brake RELEASED, attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
Do the rear brakes have a significant amount of drag?		 Go to Step 10  Go to Step 4 
4
  1. Shift the transmission into NEUTRAL.
  2. Apply the park brake.
  3. Attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
Do the rear brakes have a significant amount of drag?		 Go to Step 5  Go to Step 6 
5
  1. Release the park brake.
  2. Rotate the rear wheels to check the rear brakes for a significant reduction in the amount of drag.
Did the rear brakes exhibit a significant reduction in the amount of drag?		 Go to Step 21  Go to Step 10 
6 Visually check the park brake cable connections and the cables that are accessible on the UNDERSIDE of the vehicle for disconnections and/or damage.
Were any or the park brake cables disconnected and/or damaged?		 Go to Step 7  Go to Step 8 
7 Reconnect or replace the park brake cables as necessary. Refer to the following procedures as necessary:
Did you complete the repair and/or replacement?		 Go to Step 8  -
8 Check the adjustment of the park brake. Refer to Parking Brake Adjustment .
Was the park brake adjusted properly?		 Go to Step 10  Go to Step 9 
9 Adjust the park brake. Refer to Parking Brake Adjustment .
Were you able to attain adjustment of the park brake?		 Go to Step 15  Go to Step 10 
10
CAUTION:

Do not depress the brake pedal with the brake rotors and/or the brake drums removed, or with the brake calipers repositioned away from the brake rotors, or damage to the brake system may result.

  1. Remove the rear brake rotors. Refer to Rear Brake Rotor Replacement .
  2. Inspect the park brake shoe hardware for looseness, damaged, broken or missing components.
  3. Check the park brake actuators for a seized condition.
Does the park brake hardware and/or the park brake actuators require replacement?		 Go to Step 11  Go to Step 12 
11 Replace the park brake actuators as necessary. Refer to Parking Brake Actuator Replacement .
Did you complete the replacement?		 Go to Step 12  -
12 Have an assistant apply and release the park brake, while you observe the park brake cables for free movement.
Did the park brake cables move freely?		 Go to Step 13  Go to Step 16 
13 Check the adjustment of the park brake. Refer to Parking Brake Adjustment .
Was the park brake adjusted properly?		 Go to Step 15  Go to Step 14 
14 Adjust the park brake. Refer to Parking Brake Adjustment .
Were you able to attain adjustment of the park brake?		 Go to Step 15  Go to Step 25 
15
  1. With the transmission still in NEUTRAL, apply the park brake.
  2. Attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
  3. Release the park brake.
  4. Rotate the rear wheels to check the rear brakes for a significant reduction of drag.
Did the park brake apply and release properly?		 Go to Step 27  Go to Symptoms - Park Brake 
16 Disconnect the park brake cable connections that are accessible on the UNDERSIDE of the vehicle one at a time and check each cable for free movement.
Do any of the park brake cables accessible on the underside of the vehicle require replacement?		 Go to Step 17  Go to Step 18 
17 Replace any of the park brake cables that do not have free movement (not releasing properly). Refer to the following procedures as necessary:
Did you complete the replacement?		 Go to Step 18  -
18
  1. Disconnect the front park brake cable connection accessible INSIDE the vehicle at the park brake pedal assembly and check for free movement.
  2. Replace the front park brake cable if it does not have free movement. Refer to Parking Brake Front Cable Replacement .
Did you find and correct a condition?		 Go to Step 23  Go to Step 19 
19 Replace the park brake pedal assembly (not releasing properly). Refer to Parking Brake Lever Pedal Assembly Replacement .
Did you complete the replacement?		 Go to Step 24  -
20 Check the adjustment of the park brake. Refer to Parking Brake Adjustment .
Is the park brake adjusted properly?		 Go to Step 27  Go to Step 21 
21 Adjust the park brake. Refer to Parking Brake Adjustment .
Were you able to attain adjustment of the park brake system?		 Go to Step 26  Go to Step 22 
22
  1. Remove the rear brake rotors, if they have not yet been removed. Refer to Rear Brake Rotor Replacement .
  2. Check the park brake actuators for a seized condition.
  3. Replace the park brake actuators as necessary. Refer to Parking Brake Actuator Replacement .
Did you find and correct a condition?		 Go to Step 23  Go to Step 25 
23 Adjust the park brake. Refer to Parking Brake Adjustment .
Were you able to attain adjustment of the park brake system?		 Go to Step 26  Go to Step 25 
24 Adjust the park brake. Refer to Parking Brake Adjustment .
Were you able to attain adjustment of the park brake system?		 Go to Step 26  Go to Symptoms - Park Brake 
25
  1. Replace the component that is used to adjust the park brake system. Refer to Parking Brake Lever Pedal Assembly Replacement .
  2. Adjust the park brake. Refer to Parking Brake Adjustment .
Did you complete the replacement and adjustment?		 Go to Step 26  Go to Symptoms - Park Brake 
26
  1. With the transmission still in NEUTRAL, apply the park brake.
  2. Attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
  3. Release the park brake.
  4. Rotate the rear wheels to check the rear brakes for a significant reduction of drag.
Did the park brake apply and release properly?		 Go to Step 27  Go to Symptoms - Park Brake 
27 Install or connect any components that were removed or disconnected during diagnosis.
Did you complete the operation?		 Park Brake System OK -
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