Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1901 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESRADIO DOES NOT INTERFACE WITH PERSONAL AUDIO LINK MODULECIRCUIT/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 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the PAL module.
- Test for less than 5 Ω between terminal 9 and ground.
- If greater than specified value, test the ground circuit for an open/high resistance.
- Ignition ON, verify that a test lamp illuminates between terminal 16 and ground.
- If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
- Ignition OFF, reconnect the harness connector at the PAL module.
- Ignition ON, set the radio to the iPod® interface menu and attempt to operate audio from the iPod®.
- If the iPod® fails to communicate with the radio, replace the interface cable.
- Near the BCM connector, verify the serial data circuit from PAL is properly spliced to the serial data circuit.
- If the serial data circuit is not connected, reconnect the circuit.
- Ignition OFF, disconnect the PAL module and the X1 radio harness connector.
- Test for less than 1 Ω between terminal 9 at the X1 radio harness connector and terminal 5 at the X1 PAL module harness connector.
- If greater than specified value, replace the T-harness.
- If all systems test normal, replace the PAL module.
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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.