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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC B2745 >> 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.
  1. Ignition OFF, disconnect the X1 harness connector at the S48A Multifunction Switch - Instrument Panel.
  2. Test for infinite resistance between the signal terminal 17 and the ground terminal 14 with the switch in the open position.
    • If less than infinite resistance 

      Replace the S48A Multifunction Switch - Instrument Panel.

    • Go to next step: If infinite resistance 
  3. Test for less than 2 Ω between the signal terminal 17 and the ground terminal 14 with the switch in the closed position.
    • If 2 Ω or greater 

      Replace the S48A Multifunction Switch - Instrument Panel.

    • Go to next step: If less than 2 Ω 
  4. All OK.
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