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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1742 (DOOR LOCK SYSTEM AND DOOR HANDLES)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B1474CIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Circuit/System Testing

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X2 harness connector at the PDM.
  2. Disconnect the harness connector at the passenger door handle.
  3. Ignition ON, verify the scan tool Ext. Psgr. Door Handle Switch parameter is Inactive.
    • If not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the RCDLR.
  4. Ignition OFF, connect the X2 harness connector at the PDM.
  5. Ignition ON, verify the scan tool Ext. Psgr. Door Handle Switch parameter is Inactive.
    • If not the specified value, replace the PDM.
  6. If all circuits test normal, test or replace the passenger door handle.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.