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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Hydraulic Brakes) >> Diagnostic Information and Procedures >> Brake Warning Indicator Malfunction (with UJ1) >> Component Testing

Component Testing

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.

Park Brake Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the park brake switch.
  2. Test for infinite resistance between the signal terminal A and ground with the park brake released.
    • If less than the specified value, replace the park brake switch.
  3. Test for less than 1 ohm between the signal terminal A and ground with the park brake applied.
    • If greater than the specified range, replace the park brake switch.

Brake Fluid Level Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the brake fluid level switch.
  2. Test for infinite resistance between the ground terminal A and the signal terminal B.
    • If less than the specified value, replace the brake fluid level switch.
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