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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Navigation System - Voice Guidance Inoperative or Degraded Quality >> Voice Guidance Inoperative or Degraded

Voice Guidance Inoperative or Degraded

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with replacement. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
  1. Audio prompt out circuits open or shorted-Test the audio prompt out circuits for an open, short to ground or short to voltage. Refer to Circuit Testing and Wiring Repairs .
  2. Defective radio-Replace the radio. Refer to Control Module References for replacement, setup, and programming.
  3. Defective amplifier-Replace the amplifier. Refer to Control Module References for replacement, setup, and programming.
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