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 MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 387 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESRADIO DOES NOT INTERFACE WITH PERSONAL AUDIO LINK MODULEDIAGNOSTIC FAULT INFORMATION
2009 Chevrolet Tahoe Base, 4.8 C
Diagnostic Fault Information
2009 Chevrolet Tahoe Base, 4.8 CSECTION Diagnostic Fault Information
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.
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| PAL B+ | - | 1 | - | - |
| Left Audio Signal (+) | 2 | 3 | 2 | - |
| Left Audio Signal (-) | 2 | 3 | 2 | - |
| Right Audio Signal (+) | 4 | 5 | 4 | - |
| Right Audio Signal (-) | 4 | 5 | 4 | - |
| PAL Ground | - | 1 | - | - |
| 1. PAL module inoperative. No Communication with PAL or DRR, XM can not be selected from radio. BCM DTC U2172, Radio DTC U0194, LED on PAL does not illuminate. 2. No sound from left speakers when PAL or XM™ is sourced on radio. 3. No sound from left speakers when only PAL is sourced on radio. 4. No sound from right speakers when PAL or XM™ is sourced on radio. 5. No sound from right speakers when only PAL is sourced on 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.