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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 897 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B0023CIRCUIT/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 does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
    • The roof rail module - right
    • The SDM module
    • The roof rail module - right wiring harness connector
    • The SDM wiring harness connector
  1. Ignition OFF, remove the center pillar trim and disconnect the roof rail module - right connector. Refer to Garnish Molding Replacement - Center Pillar Upper .
  2. Connect the J 38715-A  to the harness side of the roof rail module - right connector. See Special Tools . Use the PASSENGER INFLATOR connector located on the load tool.
  3. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0023 is set in history.
    • If DTC B0023 is history replace the roof rail module - right.
  4. Ignition OFF, disconnect and remove the J 38715-A  . See Special Tools . Then remove the SDM connector. Refer to SDM Replacement  in Repair Instructions for connector location.
  5. Test the high and low circuits between the SDM and roof rail module - right for a short to voltage, short to ground, or open/low resistance.
    • If any of the above conditions are found make the appropriate repair.
  6. If all circuits test normal then replace the SDM.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
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  • • You are missing required tools, torque specs, or safe lifting equipment.
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