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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1551 (Instrument Panel System Displays & Gauges) >> Diagnostic Information and Procedures >> DTC P0381 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. 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 ECM.
  2. Ignition ON, verify that the wait to start indicator is OFF.
    • If not the specified value, test the signal circuit terminal 16 for a short to ground. If the circuit tests normal, replace the instrument panel cluster (IPC).
  3. Install a 3-A fused jumper between the signal circuit terminal 16 and ground. Verify that the wait to start indicator is ON.
    • If not the specified value, test the signal circuit terminal 16 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.
  4. If all circuits test normal, replace the ECM.
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