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Home >> Chevrolet >> 2006 >> TrailBlazer 6.0 H, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B3445 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Pontiac Torrent and 2007 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the CHMSL assembly. Clear the DTC. Using a test lamp connected to the positive battery terminal, probe the CHMSL voltage supply circuit.
    • If the test lamp illuminates, test for a short to ground in the CHMSL voltage supply circuit. If all circuits/connections test normal, replace the BCM.
  2. Replace the CHMSL assembly.
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