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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
  2. Disconnect the cruise control switch.
  3. Ignition ON, cruise control switch ON, verify that the scan tool Cruise Set/Coast Switch parameter displays Off or Inactive.
    • If the scan tool parameter reads On, Active or Invalid, test the cruise control switch signal circuit for a short to voltage. If the circuit tests normal, replace the ECM/PCM.
  4. If all circuits test normal, replace the cruise control switch assembly.
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