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Circuit/System Testing

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, valet switch OFF, if equipped. Press each button of the GDO one at a time. The LED on the GDO should illuminate with each button pressed.
    • If none of the buttons respond, test the battery positive voltage circuit and the ground circuit for an open/high resistance. If the circuits test normal, replace the GDO.
  2. Ignition ON, hold the 2 outer buttons on the GDO until the LED on the GDO stops flashing. Place the J 41540  adjacent to the GDO and press each button of the GDO one at a time. The tester should indicate when each button is pressed.
    • If the tester indicates that one or more of the buttons does not respond, replace the GDO.
  3. Program the GDO with the customers remote. A possible rolling code or incompatibility with the GDO receiver will prevent programming. Refer to www.homelink.com or 1-800-355-3515.
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