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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 44 (Park Brake System) >> Diagnostic Information and Procedures >> Park Brake System Diagnosis

Park Brake System Diagnosis

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. 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. 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 8  Go to Step 4 
4
  1. Apply the park brake.
  2. 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 18  Go to Step 5 
5 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 6  Go to Step 7 
6 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 18  -
7 Check the adjustment of the park brake. Parking Brake Adjustment 
Was the park brake adjusted properly?		 Go to Step 18  Go to Step 8 
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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. Rear Brake Rotor Replacement (JH6) , or Rear Brake Rotor Replacement (JH9)
  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 9  Go to Step 10 
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  1. Replace park brake hardware components as necessary. Parking Brake Shoe Replacement (JH6) , or Parking Brake Shoe Replacement (JH9) 
  2. Replace the rear parking brake actuator levers as necessary. Rear Parking Brake Actuator Lever Replacement (JH6) , or Rear Parking Brake Actuator Lever Replacement (JH9) 
Did you complete the replacement?		 Go to Step 18  -
10 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 11  Go to Step 13 
11 Check the adjustment of the park brake. Parking Brake Adjustment 
Did you find and correct the condition?		 Go to Step 18  Go to Step 12 
12 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 13  Go to Step 14 
13 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  -
14
  1. Disconnect the park brake release handle assembly cable connection from the park brake pedal assembly and check for free movement.
  2. Replace the park brake lever handle assembly if the release cable does not have free movement. Parking Brake Lever Handle Replacement 
Did you find and correct a condition?		 Go to Step 18  Go to Step 16 
15 Inspect the park brake lever handle assembly for proper operation and replace if necessary. Parking Brake Lever Handle Replacement 
Did you find and correct the condition?		 Go to Step 18  Go to Step 17 
16 Check the adjustment of the park brake and adjust if necessary. Parking Brake Adjustment 
Did you find and correct the condition?		 Go to Step 18  Go to Step 18 
17
  1. Replace the component that is used to adjust the park brake system. Parking Brake Cable Equalizer Replacement 
  2. Adjust the park brake. Parking Brake Adjustment 
Did you complete the replacement and adjustment?		 Go to Step 18  Go to Symptoms - Park Brake 
18
  1. Install or connect any components that were removed or disconnected during diagnosis.
  2. Verify the operation of the park brake system.
Does the park brake operate correctly?		 System OK Go to Symptoms - Park Brake 
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