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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Supplemental Inflatable Restraints) >> Diagnostic Information and Procedures >> Airbag Indicator Malfunction (Driver) >> Circuit/System Testing

Circuit/System 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 ON, verify the SDM Battery Voltage Signal parameter is 9 - 16 volts.
  2. Ignition OFF, monitor the IPC, ignition ON. The SIR warning indicator should flash then turn OFF.
    • If the SIR warning indicator continually flashes, program the SDM.
    • If the SIR warning indicator remains on steady, test for DTCs and refer to Diagnostic Trouble Code (DTC) List - Vehicle . If no DTC is current, proceed to the next step.
  3. Perform the Display Test in Instrument Panel Cluster/Special Functions. The Air Bag indicator should turn ON and OFF as commanded.
    • If the air bag indicator does not illuminate as expected, replace the IPC.
  4. If all circuits test normal, replace the SDM.
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