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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect connector X2 at the radio.
  2. Test for the vss signal between terminal E and ground while driving the vehicle.
    • If the vss signal is not present test the vss circuit for an open.
  3. If the circuit tests normal, replace the radio.
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