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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 898 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B1025-B1095CIRCUIT/SYSTEM TESTING
2006 Chevrolet Suburban C2500, 6.0 U

Circuit/System Testing

2006 Chevrolet Suburban C2500, 6.0 USECTION Circuit/System Testing
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.

Note: It is recommend that Component Testing is performed before Circuit Testing when diagnosing speaker channels.

  1. With the scan tool, verify the DTC is set by the amplifier.
    • If the DTC was set by the amplifier, test the suspect speaker input circuit for an open short to ground or short to power. If all circuits test normal, replace the amplifier.
  2. Test the suspect low level audio signal circuit from the radio to the speakers or amplifier, if equipped, for an open short to ground or short to power.
    • If all circuits test normal, replace the radio.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.