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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1104 (Door Lock Systems & Door Handles) >> Diagnostic Information and Procedures >> Trunk Release Inoperative >> Circuit/System Testing >> Trunk Release Switch Malfunction

Trunk Release Switch Malfunction

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the interior rear compartment lid release switch.
  2. Ignition OFF, scan tool OFF, test for less than 10.0 ohms between the ground circuit terminal A and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the DDM.
  3. Ignition ON, verify the scan tool trunk release switch parameter located in the driver door switch menu is INACTIVE.
    • If not the specified value, test the signal circuit terminal C for a short to ground. If the circuit tests normal, replace the DDM.
  4. Install a 3A fused jumper wire between the signal circuit terminal C and ground. Verify the scan tool trunk release switch parameter is ACTIVE.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the DDM.
  5. If all circuits test normal, test or replace the interior rear compartment lid release switch.
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